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5 Simple Steps To Install A Perfect Camper Van Electric System

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For many, installing the electrics is often the most challenging part of a van conversion. With so many different components, wires, and calculations, it’s easy to feel overwhelmed when planning your camper’s electrical system!

In this electrical guide, we break down everything you need to know in order to DIY your own electric system in a camper van. From start to finish. Step-by-step. No prior experience is needed and no electrical engineering degree required. (We’re social science and art majors, and we did fine!)

By the end of this post, you will be able to build your own van electrical system and understand how all the different components and wires come together to power all the devices in your camper. Our goal is to make this guide easy to understand with information that is practical and actionable.

We’re ready for the challenge. And we hope you are, too. So let’s go!

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    Electrical Wiring eBook For Camper Van Conversions

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    The 5 Parts To A Complete Van Electrical System

    A van’s electrical system can be broken down into five distinct sections. In each section, we provide the information and recommendations you need to help answer all the questions you’ll have. Below is a summary of the 5 parts to a functioning camper electrical system.

    What kind of batteries and how many of them will you need? Should you wire multiple batteries together in series or in parallel? In this section, you will learn everything you need about the most important part of any electrical system: the batteries!

    Most of the electrical devices that you will install in your camper van will likely run on 12V DC. What does this mean? And why? In this section, we show you how to wire 12V devices to your batteries so that they function properly. Don’t fret, intuitive diagrams are included!

    Using solar panels is the most popular way that camper vans charge their battery bank. In this section, we teach you how to properly size your solar panel system and wire all your solar components together so that you have a robust off-grid charging solution!

    In order to charge most laptops and other regular household appliances, you will need a source of 120V AC power. In this section, we show you how to wire an inverter so that you can run these types of devices from your 12V batteries.

    We recommend having at least two ways to charge your batteries. The first is using solar and the second is to connect to your van’s alternator so that you can charge while driving. In this section, we show you how to do just that!

    Chapter 1:

    The Batteries

    The batteries are the “heart” of any camper van’s electrical system and should be the first components to plan for in an electrics build. Batteries supply the power to run all your devices, such as the lights, USB ports, fan, fridge, laptops, blender, and more.

    Before installing any batteries in your camper van, you’ll need to answer three important questions.

    • What type of battery do you want?
    • How many batteries do you need?
    • Will you connect your batteries in series or parallel?

    We help you answer each of these questions below.

    1.1 - Types of Batteries for Camper Vans

    There are four different battery chemistry types that can be used in a camper van. They are:

    • Flooded Lead-Acid (FLA)
    • Gel Cell
    • Absorbent Glass Mat (AGM)
    • Lithium-Ion (LiFePO4)

    However, only the last two types (AGM & Lithium) offer realistic solutions for camper vans. This is because FLA batteries require regular maintenance and Gel Cell batteries require slower charge and discharge rates, which may not be compatible with van life. And ultimately, both of these two battery technologies have shorter lifespans when heavily used on a daily basis. (Source)

    So then which battery chemistry should you choose? AGM or lithium?

    AGM vs. Lithium Batteries

    In the table below, you can see how the two battery chemistries differ in characteristics.



    Initial Cost


    ~50% cheaper



    ~50% lighter

    Usable Energy


    ~2X more energy



    ~5X longer lifespan



    Better in cold

    From this table, you can see that these two batteries have different pros and cons. AGM batteries are almost always cheaper than an equivalent lithium battery, but tend to have shorter lifespans and usable energy.

    What Is "Usable Energy"? This is the amount of power that can be regularly & safely discharged from a battery without drastically shortening its lifespan. Lithium batteries can discharge ~90% of their power without any real negative consequences to its lifespan. Compare that to only ~50% discharge for an AGMs.

    Therefore, to answer the question about which battery chemistry you should use depends on your budget, travel timeline, and van life goals.

    To learn more about which battery better suit your needs, read our AGM vs. Lithium battery post.

    Our opinion: Lithium (LiFePO4) batteries are the clear winner over AGM. This is especially true as lithium prices have declined substantially in recent years. Check out our post ‘Why Lithium Is Worth It’ to learn more.

    Which lithium battery do we recommend? Read our Li Time vs. Redodo lithium battery review to see which budget LiFePO4 we recommend.

    Recommended Lithium & AGM Batteries

    Based on our experience and the experiences of others, below are our battery recommendations.

    Budget Lithium Batteries

    We almost never recommend AGM batteries to anyone. That is because the modern budget lithium surpasses AGMs in every important category. Due to their extremely low cost/charge cycle and long lifespans, we believe that selecting the no-frills LiFePO4 lithium battery from LiTime is the best option for the majority of camper vans. This is especially true if you plan to live in a van for longer than 1.5 years.

    Picking up two 100Ah lithium batteries will adequately serve the needs for most modern van conversions. But if you are still unsure, check out our battery calculator to double check.

    Best Budget LiFePO4
    Li Time "TM" LiFePO4 Lithium Battery

    Our top lithium battery recommendation! The Li Time "TM" packs a serious punch in a compact enclosure. Wide-ranging BMS with low-temperature protection. And superior shock resistance.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 03:33 am GMT
    Premium Lithium Batteries

    If getting the best quality power supply is critical for your van life, we 100% recommend using Battleborn batteries. We’ve been using Battleborn for 4 years in our camper and never once had any issue with them. High quality components and customer service.

    100Ah 12V Lithium (LiFePO4) Battery (Battleborn)
    • Up to a Decade of Use - Enjoy superb return on your investment with this heavy duty 100Ah 12V...
    • Built for Rugged Adventures - Our fast-charging LiFePO4 100Ah 12V batteries are the perfect camper,...
    • Designed for Versatility - This eco-conscious and lightweight Battle Born Lithium 100Ah 12V battery...
    AGM Batteries

    We don’t discount AGM batteries entirely. And for many van lifers, AGMs continue to be the battery of choice to supply their power needs.

    If, after reading this article, you believe AGMs still provide the best battery solution for your needs, we recommend the following AGM model.

    100Ah 12V AGM Battery (VMAX)
    • 12 Volt 100Ah Group 27 Deep Cycle Heavy Duty AGM Marine Deep Cycle Maintenence Free Battery...
    • Electrolyte Suspension system VMAX tanks utilize an electrolyte suspension system consisting AGM...
    • Heavy Duty Grids: VMAX heavy duty lead tin alloys provide an extra margin of performance and service...

    1.2 - Connecting Multiple Batteries Together

    You can connect multiple batteries together in different ways to increase total battery capacity and overall voltage. Batteries can be connected in either parallel or series. We discuss each type of connection below.

    Parallel Connections

    Three batteries connected in parallel

    To connect multiple batteries in parallel, connect all the positive terminals together and all the negative terminals together. The effect is that the total amount of current (Ah) increases but the overall voltage (V) stays the same.

    Series Connections

    Three batteries connected in series

    To connect multiple batteries in series, connect the negative terminal of the first battery to the positive terminal of the second battery. Then the negative terminal of the second battery to the positive terminal of the third battery. And so on. The effect is that the voltage of the battery bank increases, but the overall amount of current does not increase.

    Why increase the voltage? You should only wire batteries in series if you want to increase the voltage of your battery bank. Some campers like to run a 24V system but most choose their battery banks to run on 12V. Read our 12V vs. 24V post to learn more.

    Our opinion: Usually only large, sophisticated RVs tend to utilize a 24V system, which offers little benefit for small to medium-sized electric systems. We recommend buying 12V batteries and keeping the system at 12V by wiring multiple batteries in parallel to increase power capacity.

    Best Wire Size (AWG) For Battery Connections

    If you’ve read our leisure battery wire size post, then you know we like to keep things simple. For all battery to battery connections, we recommend using high quality 2/0 AWG stranded copper wire. This wire thickness will ensure that you can power all your van’s electrical devices without overheating and is safe for 120V inverters that are rated up to 3000W. (We talk more about inverters in Chapter 4)

    Our Recommendation
    EWCS 2/0 Gauge Wire
    $152.80 ($76.40 / Count)

    Safety is a top priority. This ultra flexible, premium copper cable is wrapped in tough EPDM insulation and handles 175+ Amps of 'continuous' current. This is PLENTY for most camper vans. Get peace of mind with this wire.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 10:01 am GMT

    Watch Our Video Review: Click the button in the display box above to watch our YouTube video reviewing these EWCS 2/0 AWG wires.

    We also recommend using 2/0 AWG wire when connecting the batteries to several other downstream electrical components (e.g. bus bars, inverters, & 12V panels). So be sure to get a enough length of red and black wire. 10-15 feet is usually sufficient.

    Wire Quality: All wires that we recommend are high quality, pure copper, stranded wires. Many cheaper wires found online are copper-clad aluminum (CCA). CCA wires are cheaper to manufacture and can safely conduct less current (Amps) than pure copper wires.

    Additional Components & Tools

    To connect the 2/0 AWG wires to the batteries, a copper lug (ring connector) must be attached to the wire end. The ring connector then connects to the battery terminal posts.

    To attach the ring connector, you’ll need the following components and tools.

    2/0 wire with lug terminal crimped on.
    • Copper Lugs – These lugs attach to the 2/0 wire ends and connect to the battery. Make sure you get the lugs with the correct ring size for your battery. The Redodo battery we recommend above uses 5/16″ rings, but the BattleBorn uses 3/8″ rings. Heat shrink is included.
    • Wire Cutter – This is the correct tool to cut through the thick 2/0 AWG wires.
    • Hydraulic Crimper – Crimps the copper lugs to the wire ends. Use this instead of the cheaper hammer lug crimper for higher quality crimps.
    • Heat Gun – Activates heat shrink over copper lugs and wire.

    Watch the video below to learn how all these components and tools work together to successfully attach a lug onto stranded wire cable.

    1.3 - Calculating How Many Batteries You Need

    Power capacity is rated in Watt-hours (Wh) and most 12V batteries that you can find online are rated for 1,200Wh.

    Battery Capacity Note: Battery capacity is rated in Amp-hours (Ah) and most batteries are either 100Ah or 200Ah in size. To get Watt-hours, multiply a battery's Ah with their rated voltage (usually 12V).

    In order to figure out how much battery power you need, you must calculate how much power (Wh) your camper van will use in a 24-hour period. The more electrical devices your van has, the more power it will use, and the more batteries you will need.

    Do The Proper Calculations: We’ve seen too many camper vans trying to power too many devices with too little battery power. As a result, they are always running out of battery power and their batteries die prematurely and need to be replaced. Take the time to properly calculate an appropriate battery bank size.

    To calculate how much battery power you need to sustain your camper’s electrical system, follow these steps.

    To learn how to do each step, check out our post “How To Calculate Your Ideal Battery Size”

    1.4 - How To Charge The Batteries

    There are four primary ways to charge batteries in a camper van.

    • Solar Charging |  This method uses solar panels to convert the sun’s energy into usable power. This is a great option for passive charging throughout the day, just as long as it’s sunny outside. Skip to chapter 3 to learn more.
    • Alternator Charging (while driving) | This popular method charges the camper batteries while you are driving. This is a great option during the winter, when solar power is less reliable. Skip to chapter 5 to learn more.
    • Shore Power Charging | This involves connecting a 12V inverter/charger to any outside wall socket. This is a great option for a quick charge if you happen to be located near a socket. Skip to chapter 4 to learn more.
    • Generator Charging | Portable generators use either gasoline or propane (LPG) to create power. However, you will need a converter (e.g. inverter/charger) to convert the AC power produced by the generator into DC power used by the batteries.

    For more information, read: 4 Ways To Charge Camper Van Leisure Batteries

    1.5 - Chapter One Summary

    At this point, you should have a solid understanding of the following three points regarding the batteries of a camper van’s electrical system.

    1. What type of battery chemistry you will be using,
    2. How many batteries you will need,
    3. How to connect multiple batteries together.

    In the next chapter, we’ll discuss how to begin connecting critical components to those batteries to build a functioning 12V system.

    Chapter 2:

    The 12V DC System

    Now that you’ve selected your batteries and wired them together, you’re ready to assemble the camper van’s 12V electrical system. This section includes wiring the batteries to individual 12V devices, like the ceiling lights, vent fan, and USB ports.

    If you follow this chapter to the end, you should end up with a wiring system that is similar to the diagram below. We’ll discuss all the parts and components you’ll need to recreate this exact same setup.

    Complete camper van 12V wiring diagram connecting leisure batteries to 12V devices
    Complete 12V wiring diagram for camper vans

    Download our free eBooks to view many more electrical diagrams similar to the one above!

    There’s a lot going on in the above diagram. Lots of different components and wiring. So to help you better make sense of this wiring diagram, we separate this 12V DC system into three parts.

    2.1 - Batteries To Bus Bars

    The first step when setting up your 12V system is to connect the batteries to the bus bars. To complete the connection between the batteries to the bus bars, we will be wiring four additional components in-between. We talk about each of these components below.

    Wiring diagram connecting 12V leisure batteries to bus bars
    Wiring 12V batteries to bus bars

    What Are 'Bus Bars'? Bus bars are power distribution & collection centers. Once bus bars are connected to the batteries, you then connect all downstream electrical components to these bus bars instead of directly to the batteries. This keeps your wiring system clean and simple.

    List Of Materials

    Below is a detailed list of materials you’ll need to wire the auxiliary/leisure batteries to the bus bars.

    2/0 AWG Wire

    2/0 AWG wire is ideal to connect the batteries to the bus bars and recommend this wire size if you will be installing up to a 2000W inverter. (If you are using a 3000W inverter, consider upgrading to 4/0 AWG)

    This is the same cable we recommend when wiring multiple batteries together. We will also be using this same wire to connect several other devices in the later chapters.

    Our Recommendation
    EWCS 2/0 Gauge Wire
    $152.80 ($76.40 / Count)

    Safety is a top priority. This ultra flexible, premium copper cable is wrapped in tough EPDM insulation and handles 175+ Amps of 'continuous' current. This is PLENTY for most camper vans. Get peace of mind with this wire.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 10:01 am GMT

    Learn more about this 2/0 AWG wire on our product information page.

    Copper Lug Terminals

    Lug terminals are essential to attach electrical wire to various components. If you’re using the 2/0 AWG wire we recommend, you’ll need a combination of lug with 3/8″ and 5/16″ ring diameter sizes. You can refer to our lug sizing chart below. Our lugs are color coordinated and match with our wiring diagrams so that you know which lug goes where.

    (Note: We will get into the 4 AWG (green) lugs in another section)

    Copper lug terminal sizing chart for 12V systems
    12V lug sizing chart

    Below, we list the two sets of lugs you’ll need below to complete this parts of the wiring process.

    09/15/2023 11:21 pm GMT
    300A ANL Fuse/Holder

    Fuses prevent unforseen spikes in electrical current from overheating and burning your wires. The 2/0 AWG wires we recommend are welding cables and can safely withstand up to 400A of current. (Source)

    We suggest a 300A fuse to protect the 2/0 wire and all downstream electrical devices. You almost certainly will never be drawing more than 300A of power in your camper.

    Terminal Post Size: 5/16″

    ANL Fuse + Holder (300A)

    Protects 2/0 AWG wire from overheating and potentially catching on fire. This fuse accepts 5/16" lug terminals. Comes with backup fuse.

    We earn a commission if you make a purchase, at no additional cost to you.
    Master On/Off Switch

    This master switch keeps you safe from electrical hazards when you a building and maintaining your electrical system.

    Whenever we need to add & remove components or touch any electric terminals, we turn the switch to ‘OFF’ to stop the flow of electrical current from the batteries.

    Terminal Post Size: 3/8″

    Top Quality Pick
    Battery Switch (Blue Sea Systems)

    This heavy-duty master switch is used to disconnect & isolate the leisure batteries from the rest of the electric system. This is useful for safety when conducting routine electrical maintenance and during long-term vehicle storage.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/15/2023 10:26 pm GMT

    Learn more about this master switch on our product information page.

    Battery Monitor

    Unlike a phone or laptop, 12V batteries do not display their state of charge (SOC) percentage. But by installing a battery monitor, this device will display your battery’s SOC by monitoring the watts as they enter and exit the batteries.

    Although pricey, we recommend the Victron BMV-712 because its Bluetooth capabilities allow you to pair the device to your smartphone. Read our battery monitor wiring post to learn more.

    Terminal Post Size: 3/8″

    Important To Have
    Victron Battery Monitor (Bluetooth)

    Prolong your battery's lifespan. Knowing your battery's state-of-charge (SOC) is a critical factor in preventing it's premature death. This monitor displays percentage charge, voltage, instantaneous power flow, and more. Bluetooth capable means easy connection to any smartphone.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/15/2023 08:46 pm GMT

    Learn more about battery monitors on our product information page.

    Bus Bars

    Bus bars are power distribution and collection centers. By connecting your batteries to these bus bars, you can then connect all future downstream electrical components (e.g. the 12V panel, solar charge controller, & inverter) to these bus bars instead of directly to the batteries.

    Prioritize proper cable management with bus bars.

    Terminal Post Size: 3/8″

    Top Recommendation
    Bus Bars (3/8" Posts)
    $34.99 ($17.50 / Count)

    Bus bars are power distribution centers that collect and distribute electricity to/from multiple sources. They simplify the wiring process and help keep electric wiring clean and orderly. Connects to batteries, solar charger, inverter, and DC-DC charger.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/15/2023 09:43 pm GMT

    Learn more about bus bars on our product information page.

    Splurge alternative: Victron Lynx Distributor

    2.2 - Bus Bars To 12V Panel

    With the bus bars now connected to the batteries, you can connect the 12V fuse panel to the bus bars.

    Wiring diagram connecting bus bars to 12V fuse panel
    Bus bars to 12V fuse panel

    List Of Materials

    Below is a list of materials you’ll need to wire the bus bars to the 12V fuse panel.

    4 AWG Wire

    We recommend 4 AWG wire to connect the bus bars to the fuse panel. This is because Windynation rates their 4-gauge wire at 150A, but the Blue Sea Systems fuse panel is rated for only 100A. This means the fuse panel will not be limited by the wire.

    4 AWG Wire (5' Red + Black)

    100% stranded copper wire. Rated for 150 Amps of continuous current and ideal for connecting the bus bars to the 12V panel. Tough EPDM insulation to resist UV, water, oil, and salt corrosion.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 01:11 pm GMT
    Copper Lug Terminals

    To help save you money, we recommend getting this lug terminal set which covers 2 to 8 gauge wires. This set will have the 1/4″ and 3/8″ lugs you’ll need to complete this section and you’ll need other lug sizes for other parts of your electrical system.

    Lug Terminal Set (2-8 AWG, M6-M10, 120PCS)

    Save money with this convenient lug terminal set. It covers 12 different lug sizes from 2-8 AWG wires and M6-M10 ring diameters. Heat shrink is also provided.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 02:20 am GMT
    120A Circuit Breaker

    To protect the 4-gauge electrical wire and the fuse panel, installing a 120A circuit breaker is recommended.

    Terminal post size: 1/4″

    120A Circuit Breaker with Reset Switch (Gloso)

    Protects the 4 AWG wire that connects the bus bars to the 12V fuse panel. The Blue Sea Systems fuse panel recommends a 125A breaker, but this 120A will also do.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 08:11 pm GMT

    12V Fuse Panel

    This fuse panel connects to all your downstream 12V devices and allows for up to 12 device connections. In our van, we connect this panel to our:

    • LED lights
    • Vent fan
    • 12V fridge
    • Water pump
    • Diesel heater
    • USB sockets

    Terminal Post Size: 1/4″

    12V Recommendation
    Blue Sea Systems Fuse Panel (12 Circuits)

    A 12V fuse panel is essential for distributing power from the leisure batteries to each 12V device. This panel accommodates up to 12 circuits with slots for blade fuses. The plastic cover with labels helps keep everything organized and safe.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 08:26 pm GMT

    Learn more about 12V fuse panels on our product information page.

    2.3 - 12V Panel To Devices

    Once the fuse panel is connected to the bus bars, you’re ready to connect all your 12V devices to the panel. Below is everything you will need to get this done.

    Wiring diagram connecting the 12V fuse panel to individual 12V devices
    12V fuse panel to 12V devices

    List of Materials

    Below are the materials you’ll need to wire the fuse panel to each of your 12V devices.

    Ring connector (#8 - 14AWG)

    These specific ring connectors fit the #8 terminal posts on the fuse panel. Each 12V device will need two of these ring connectors; one for the positive post and the second for the negative post.

    Connects To 12V Panel
    #8 Ring Terminals (14 AWG)
    $9.99 ($0.20 / Count)

    Use these ring terminals to connect the 14 AWG wire to the 12V fuse panel. Heat shrink is built into the terminals to reinforce and protect the connection.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/15/2023 08:41 pm GMT
    14/2 AWG Wire

    14AWG wire is the preferred wire size to connect all 12V devices to the fuse panel. These wires can handle 240W of power (20A) at 12V, which is more than enough for each of your devices.

    We recommend getting ’14/2′ wires, which means two 14AWG wires (red and black) are encased in an outer jacket. This gives an additional layer of protection against vibrations, sliced wires, and short circuits.

    Our Recommendation
    GS Power 14AWG Wire - Red & Black
    $79.06 ($0.79 / Feet)

    The #1 seller on our site. Get this 14AWG wire for all your 12V device connections. We like the tough outer jacket that protects the inner wires from the constant vibrations when driving. These tinned copper wires are 'marine grade' for superior resistance against corrosion.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/15/2023 08:30 pm GMT

    Learn more about 14 AWG wire on our product information page.

    Butt Connectors (14 AWG)

    Each 12V device comes attached with a short length of red and black wire. You will need to extend these wires to the fuse panel with butt connectors.

    These butt connectors also come with heat shrink pre-attached for improved connections to the copper wire.

    To Extend 14 AWG Wires
    Wirefy Butt Connectors (16-14 AWG)
    $22.99 ($0.15 / Count)

    Use these butt connectors to extend the red & black wires from each 12V device to the fuse panel.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 10:51 am GMT
    Blade Fuses

    The connection of each 12V device to the batteries isn’t complete until a blade fuse is inserted into the slots in the fuse panel to complete the circuit.

    Blade fuses come in different amp-ratings (color coded). To calculate the correct fuse size for each 12V device, find the device’s peak current draw and round up to the next fuse size.

    For Example: The Maxxair vent, fan at its fastest speed, uses 5A of power. Rounding up to the next fuse size give us 7.5A.

    Insert Into 12V Panel
    Standard Blade Fuses Kit

    Insert these blade fuses into the appropriate slots in the 12V fuse panel to complete each circuit.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 01:45 am GMT

    2.4 - Popular 12V Devices For Campers

    Below is a list of popular 12V devices that are commonly installed in camper vans and RVs.

    • LED Lights:  These 12V puck lights are popular in the van life community. But light strips and fairy lights are also common.
    • Ventilation Fans | Proper ventilation is a must for van life. The Maxxfan and FANtastic Fan are the two most popular models.
    • USB Sockets | We like these USB/12V combo sockets. The number of electric devices that plug into these two types of sockets is virtually endless.
    • Fridges | Our electric fridge cooler is a top 3 van life essential for us. Read 6 Reasons To Get An RV Fridge and our Dometic fridge review to learn more.
    • Water Pumps | Pumps water from your fresh water tank to the faucet. The ShurFlo pump is a popular model among van lifers.
    • Fuel Heaters | Whether a heater runs on diesel, gasoline, or propane, it will require a 12V connection to the batteries.
    • Composting Toilets | Several professionally made composting toilets, like Nature’s Head, include a small 12V fan to exhaust the bad air.

    2.5 - Chapter Two Summary

    At this point, you should be able to connect all the 12V devices to your battery bank through the bus bars. For more detailed help and explanation, check out the following articles.

    And remember, you can always download our electrical wiring eBook, which is completely free.

    Chapter 3:

    The Solar 'PV' System

    Relying on solar panels is the best way to keep your batteries charged on a daily basis. Spending the time to install solar panels is worth it. And if you’re on a tight budget, just know that you can build a complete solar system for less than $450.

    But before you start randomly buying solar panels and hoisting them up on your van’s roof, you’ll need to answer the following questions:

    • What type of solar panels you want?
    • What size solar array do you need?
    • What size charge controller?
    • Will you connect your panels in series or parallel?

    We help you answer each of these questions below.

    3.1 - Types Of Solar Panels

    When building a solar system for a camper van, there are three types of solar panels to choose from.

    Rigid Panels

    These are the most popular solar panels for campers because of their durable construction, which includes a rigid aluminum frame and a top layer of tempered glass for added protection.

    100W BougeRV 9BB Solar Panel

    Flexible Panels

    These panels are much thinner than their rigid panel counterparts and do away with the thick aluminum frame. As a result, these solar panels are highly flexible and have a lower profile, ideal for stealth camping.

    Renogy 100w Flexible Solar Panel For Campers

    Foldable Panels

    Renogy 100w Foldable Suitcase-style Solar Panel

    These solar panels fold up and store away inside your camper when not needed. The ultimate panels for complete stealth. And when you need to charge, simply take the panels out and point them towards the sun.


    Our Opinion: Get rigid solar panels and forget trying to be stealthy. Rigid panels last longer, are more durable, and better withstand scruffs from low branches, dirt, and dust.

    To learn more, read our more thorough solar panel comparison for campers.

    3.2 - How To Calculate Your Solar Array Size

    It is important to have the proper amount of watts in your solar array because if you install too little wattage, you won’t be able to properly recharge your batteries each day. This can lead to running out of power during the night.

    If you already correctly sized your battery bank system (Section 1.3), then figuring out your ideal solar array size is easy. This is because the size of a solar array should correspond to the battery size.

    A Common Misconception: Some van lifers calculate their solar array size based on their daily power usage. However, if you properly sized your battery bank to meet your daily power usage, then you should match your solar array size to your battery bank size.

    If you have a 12V battery bank, use the below ratios to determine your solar array wattage size.

    • If you are using lithium batteries, use a 1:1 ratio of battery bank Ah to solar array watts.
    • If you are using AGM batteries, use a 2:1 ratio of battery bank Ah to solar array watts.

    Have A 24V System? Use a 1:2 ratio for lithium batteries and a 1:1 ratio for AGM batteries.

    Refer to the sizing table below to locate your ideal solar array sized (based on 12V battery Ah size AND chemistry)

    Battery Size (Ah)

    Solar Array Size (W)

    (With AGM)

    Solar Array Size

    (With Lithium)




























    To learn more, read our post on how to calculate your perfect solar array wattage

    3.3 - Series vs. Parallel Connections

    Just as when wiring multiple batteries together, you can choose to connect multiple solar panels  together either in series or parallel. You can see the wiring differences between the two styles in the graphic below.

    Series vs. Parallel Solar Panel Connections

    Wiring Panels In Series

    To wire multiple solar panels in series, connect the negative line of the first panel to the positive line of the second panel. Then connect the negative line of the second panel to the positive line of the third panel. And so on.

    The result is that the voltage (V) of each individual panel is added together, but the overall current (A) only equals the output current of a single panel.

    Wiring Panels In Parallel

    To wire multiple solar panels in parallel, connect all the positive lines together and all the negative lines together using MC4 branch connectors. If you have two solar panels, use a 2-1 branch connector. If you have three solar panels, use a 3-1 branch connector. And so on.

    The result is that the individual current (A) of each individual panel is added together, but the overall voltage (V) equals the output voltage of a single panel.

    Series vs. Parallel: Which Is Better For Solar?

    It is up to you to decide how you like to connect your solar panels together. Panels wired in parallel are more efficient when partially shaded, but require additional components (branch connectors) and you ‘might’ need to install a solar fuse.

    Have A 24V System? You will likely need to wire your panels in series to create a higher voltage with which to charge your batteries.

    Our Opinion: If you only have two solar panels, connect them in parallel for added efficiency in shade. Two panels in parallel do not need to be fused. If you have three or more panels, consider wiring them in series for a simplified wiring process without fuses.

    Learn more:

    3.4 - Solar Charge Controllers

    After the solar panels, the solar charge controller is the most important device in any solar PV system.

    What Are 'Solar Charge Controllers'? Charge controllers regulate the voltage from the solar panels so that a battery can receive the solar power and charge properly. Without a charge controller, the solar panels will overcharge and kill the battery.

    What Size Solar Charge Controller Do You Need?

    Charge controllers come in different sizes (amp-ratings). The larger the solar array, the larger the charge controller will need to be. Find your ideal charge controller size using the table below based on the total wattage of your solar array (assuming you’re running a 12V system).

    Have A 24V System? Divide your solar array size by two and use the below table.

    Solar Array Size


    Charge Controller

    (Amp Rating)

    Buy Now















    Our Opinion: We love our Victron charge controller and connect our smartphones to the device via Bluetooth multiple times per day. Check out our Victron charge controller review to learn more.

    3.5 - How To Wire A Solar System

    In this section, we go over all the wires and components required to connect the solar panels to the bus bars. In the end, your solar system should look like the diagram below.

    Complete solar wiring diagram for camper vans for up to 440W of solar
    Complete solar wiring diagram for camper vans

    Download our free eBooks to view many more electrical diagrams similar to the one above!

    Solar Panels

    With so many types and sizes of solar panels on the market, it can be paralyzing to know which panels to choose.

    Whichever you do select, make sure you’re getting the highest efficiency solar panels with ‘9BB’ technology, like these panels from BougeRV.

    Learn more: What are 9BB solar panels?

    BougeRV 180W Solar Panel (High-Efficiency)
    • 1-on-1 Solar Solution by BougeRV Tech Support & Warm Warranty.BougeRV promises a 25-years warranty...
    • 9BB Cell Design. More Busbar, More Power. BougeRV 180W solar panel uses the high-level 9BB cell...
    • Made of Class A Solar Cell. No visible defects and any microcracks, BougeRV 180 watts solar panel...

    Stranded Copper Wire (Red & Black)

    It is important that you use the correct size wire when assembling your solar system. The two most important factors that decide solar wire size are:

    1. Solar panel connection type (series vs. parallel)
    2. Total wattage of solar array

    10 AWG wire is what most camper vans will need, but check out our solar wire calculator post to help you choose the best wires for your solar system.

    10 AWG Wire (25' RED Only)

    We love Ancor's 'marine grade' wires for solar installations. The insulation jackets are UV & salt water resistant (good for rooftop installations).

    We earn a commission if you make a purchase, at no additional cost to you.
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    Learn more about solar wire in our product information page.

    MC4 Connectors

    MC4 connectors are the standardized connection type for solar systems.

    Although solar panels come with two pre-attached MC4 connectors, you will need at least one additional pair to complete your system.

    MC4 Connectors + Spanners
    • 6 pairs solar panel connectors Male & Female + 6 pairs solar connector pins (male & female) + 1 pair...
    • Conductor pin is tinned Copper£º It makes a rock solid connection after you crimp the pin to the...
    • WATERPROOF RING on connection is perfect to seal out water and dust to prevent corrosion, PPO...

    Solar Entry Gland

    This entry gland attaches to the roof of your van and protects the solar wires as they enter the vehicle from the outside.

    Silicone sealant comes included with this product.

    Solar Entry Gland
    • PG7 Waterproof cable gland used for all cable types 2mm² to 6mm² in Dia ,Widely used for solar...
    • Suitable for most round cables for Solar Panel,DC power, Aerial, satellite, Air conditioning,...
    • Can be fixed with Glue (not included) Sikaflex 221 Sikaflex 252, 291, dicor sealant, alike or...

    Learn more about solar entry glands in our product information page.

    Solar Charge Controllers

    Charge controllers regulate the voltage from the solar panels to the batteries and is a critical device for any solar system. Check out our additional charge controller resources to learn more:

    Top Pick
    Victron MPPT 100/30 Solar Charge Controller

    We love this Victron controller not only for it's high quality build, but the Bluetooth feature is rock solid. The Victron smartphone app provides an amazing interface to monitor all your solar data. This 30A charger is good for solar systems up to 440W (for 12V batteries).

    We earn a commission if you make a purchase, at no additional cost to you.
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    Learn more about solar charge controllers in our product information page.

    Circuit Breaker

    The circuit breaker protects the solar wire from overheating and all downstream electrical components from any unforeseen surges in power.

    The amp rating of the circuit breaker should match the amp-rating of your solar wire, so be sure to size your solar wires first.

    Connect your solar wire to the circuit breaker with appropriately sized ring connectors. If using 10 AWG solar wire, these M6 ring connectors will work.

    T-Tocas 40A Circuit Breaker
    • Compact and lightweight design; Meet S.A.E. J1625, J1171, UL1500 (Ignition Protected)
    • 1/4 inch Stainless Steel Studs, Surface Mount, protective stud insulator included
    • Hi-Amp 40A Circuit Breaker, Red or Yellow (Random Color) manual reset button

    Learn more about this specific circuit breaker in our product information page.

    Ring Connectors (To Bus Bars)

    Use ring connectors to connect the solar wire to the bus bars. If you use our recommended bus bars, get the M10 connectors.

    You must also size your solar wires before selecting your ring connectors. If, like us, you are using 10 AWG solar wires, these exact M10 ring connectors will be what you need.

    M10 Ring Connectors (For 10 AWG Wires)
    • 3/8" EYELET - This value pack includes 90 PCS ring terminals for 3/8" screw. These electrical...
    • EASY TO USE - Wirefy heat shrink connectors can be applied seconds. Simply strip the wire, make a...
    • PROFESSIONAL RING TERMINALS - These wire terminals are crafted from pure copper to achieve maximum...

    3.6 - Mounting Solar Panels On Roof

    Before hoisting your solar panels onto the roof, there are two things to consider.

    Solar Panel Layout

    Will you be laying out your solar panels length-wise or width-wise? And which way is the most space efficient?

    Laying solar panels lengthwise vs. widthwise on a camper van roof

    To answer these questions, you’ll need to know the individual size of your solar panels and the dimensions of your van’s roof. Then you can play around with different configurations to help you decide the best possible fit.

    To learn more, read: Solar Panel Roof Layout Design

    Direct Mount vs. Roof Rack

    Will you be installing the solar panels directly onto your van’s roof with screws and silicone sealant? Or will you install a roof rack first?

    • Direct Mount | By installing the panels directly onto your van’s roof, you will have the lowest profile for your solar panels. This is the stealthier option. The downsides are that you will be creating holes in your van’s roof (leak potential) and removing the panels for maintenance will be a hassle.
    • Roof Rack | All roof racks increase public awareness to your camper but they offer a less invasive installation process for your panels. Plus, the slim roof racks at Flatline Van Co. are pretty slick.

    Our Opinion: We installed the solar panels directly to our van’s roof. They’ve worked great, look streamlined, and we haven’t had any leaks (yet). But we if could do our build again, we’d spend the money on a low profile roof rack instead.

    3.7 - Solar System Summary

    After reading this chapter, you should have a solid understanding of the following concepts.

    • The ideal solar array size that meets your electrical needs.
    • Your perfect solar charge controller size.
    • How to wire the solar panels to the batteries.
    • How to mount solar panels to your van’s roof.

    Still have questions? Check out our other solar resources:

    Chapter 4:

    The 120V AC Inverter System

    To run many common household appliances and most laptops, you will need a source of 120V AC power. The 12V power supplied by the batteries will not be enough to operate these types of devices.

    To get 120V power, you will need to connect an inverter to your 12V batteries. An inverter increases the 12V power from the batteries and outputs 120V AC power.

    This section will help you answer the following questions:

    • What size and type of inverter do you need?
    • What size wires are required?
    • How to install an inverter and all related components?

    We help you answer each of these questions below.

    4.1 - How To Size An Inverter For Your Camper Van

    Getting the right size inverter that meets your energy demands is important. If you select too small of an inverter, some of  your larger appliances may not function properly. There are two factors to consider when sizing your inverter.

    Sum Of Total Load

    To know your minimum inverter size, you will need to calculate the max wattage your AC loads will require when run at the same time. If you don’t plan to use two certain appliances at the same time (like a hair dryer and blender), don’t add them together. Lastly, be sure to account for an appliance’s peak power and not their continuous power. Some appliances require additional wattage on startup.

    Example: Perhaps you plan to run your laptop (~100W), an InstantPot (~850W), and charge your camera (~30W). The max wattage from your AC loads is 980W.

    Next, take the wattage sum and add 20% to this figure to ensure you don’t trip the inverter’s safety shut-off feature. Lastly, round up to identify an inverter size that is right for you.

    Example: 980W * 1.2 = 1,176W. Rounding up means that either a 1,500W or 2,000W inverter would be the right size for your AC loads.

    Battery Bank Chemistry & Capacity

    You must also be conscious that the inverter size you calculated appropriately matches your battery bank’s capacity and chemistry.

    Because lithium and AGM batteries have a different Peukert Exponent, we recommend the following  ratios of battery capacity to inverter wattage (for 12V battery banks).

    • AGM Batteries: 350W of inverter power for every 100Ah of AGM battery capacity.
    • Lithium Batteries: 1000W of inverter power for every 100Ah of lithium battery capacity.

    Have A 24V System? Use 700W of inverter power for every 100Ah of AGM and 2000W of inverter power for every 100Ah of lithium.

    4.2 - Standard Inverters vs. Inverter/Chargers

    Standard inverters will only take 12V power and convert it to 120V power. For these inverters, electricity only flows in one direction.

    However, there are inverters that double as a battery charger. Not only do they convert 12V battery power to 120V, but they can also convert 120V power back to 12V power when connected to shore power to charge the batteries. When you read about charging batteries by connecting to ‘shore power’, you will need to have an inverter/charger model to do this.

    But picking up an inverter/charger model will cost you extra. These models can often cost almost twice as much as a standard inverter. For many camper vans, however, this additional cost is worth it.

    Avoid Cheap Inverters: Many cheap inverters on the market are 'modified sine wave' inverters. These should be avoided as they can break more sophisticated devices, like laptops. Instead, look for 'pure sine wave' inverters.

    Our Opinion: If your budget allows, get an inverter/charger. Charging from shore power is a great backup option when solar power can’t meet your energy demands (i.e. during winter or when parked in shade).

    4.3 - Wiring An Inverter In A Camper

    In this section, we go over all the wires and components required to integrate an inverter into your camper van’s electrical system. In the end, the finished result should look like the diagram below.

    Wiring leisure batteries to the inverter
    Complete inverter wiring diagram

    Download our free eBooks to view many more electrical diagrams similar to the one above!

    We break down the inverter wiring process into three sections:

    • Bus bars to inverter
    • Inverter to sockets (AC Out)
    • Inverter/Charger to shore power (AC IN)

    Bus Bars To Inverter

    The first step in the inverter wiring process is to connect the inverter to the batteries. Because we already connected the bus bars to the batteries (in chapter 2), we only need to connect the inverter to the bus bars to complete the circuit.

    Wiring diagram connecting the inverter to the bus bars
    Inverter (Or Inverter/Charger)

    At this point, you should know what size inverter you need to power your 120V system and whether you will be getting an inverter only or an inverter/charger combo.

    Every inverter has two large terminals (usually color coded in red and black). You will need to connect these terminals to the bus bars.

    Learn more: How To Install An Inverter In A Camper

    Victron 2000W Multiplus Inverter/Charger
    • Victron Energy Multiplus is a powerful compact 12-Volt 2000VA 80 amp 120V true sine wave inverter...
    • With the unique Power Assist feature Victron Energy MultiPlus will prevent overload of a limited AC...
    • In the event of a grid failure, or when shore or generator power is disconnected, the inverter is...

    Learn more about inverters on our product information page.

    2/0 AWG Wire

    2/0 AWG wire is the perfect size for any inverter rated up to 3000W.

    This is the same wire thickness we recommend when connecting multiple batteries together and when assembling the 12V system.

    Our Recommendation
    EWCS 2/0 Gauge Wire
    $152.80 ($76.40 / Count)

    Safety is a top priority. This ultra flexible, premium copper cable is wrapped in tough EPDM insulation and handles 175+ Amps of 'continuous' current. This is PLENTY for most camper vans. Get peace of mind with this wire.

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    Copper Lugs (3/8" - 2/0AWG)

    You will need copper lugs to connect the 2/0 wire to both the inverter and to the bus bars. The 3/8″ lugs we recommend will fit the bus bar terminals any any Victron-branded inverter, but you will want to check the terminal size on the particular inverter you selected to ensure these lugs will fit.

    Copper Lugs (2/0 AWG - 3/8-in) + Heat Shrink
    • 【What You Get:】 10 Pcs per pack of 00 Guage (AWG) 3/8" ring terminals copper lugs closed end...
    • 【Quality Material:】 The TKDMR bare copper battery cable ends are made from 100% annealed copper...
    • 【Reliable and Easy to Use:】These battery lugs with heavy duty construction,improves high...

    Inverter To Sockets (AC Out)

    Every inverter has an ‘AC Out’ section and this is where the 120V power gets distributed to all the AC devices in the camper van. In this section, connect 12/3 AWG wire from the inverter to a circuit breaker (and box) and then connect the wire to all the downstream sockets.

    The final result should resemble the diagram below.

    Wiring diagram connecting the inverter to the power outlets

    A Simplified Solution: Many inverters, like this AIMS 2000W, come with AC sockets built into them. Oftentimes, many van lifers will simply plug an extension cord into these built-in sockets and be done with their 120V wiring.

    12/3 AWG Wire

    Assuming you won’t be using AC devices simultaneously with a combined wattage of more than 2,200W (which is A LOT for a camper), this 12/3 wire will meet your electrical needs.

    12/3 means that there are three 12 AWG wires packed inside an outer jacket. One wire for positive, one for negative, and one for ground.

    Our Recommendation
    Ancor 12/3 AWG Triplex Wire

    Perfect for all 110V wiring. This 'marine grade' wire is perfect for all AC Out connections from the inverter to standard 15A outlets. The tough outer jacket resists cuts & abrasions and like that the copper wires are tinned to resist corrosion.

    We earn a commission if you make a purchase, at no additional cost to you.
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    Learn more about 12/3 AWG wire on our product information page.

    Breaker Box

    This breaker box stores the 15A AC breaker. This particular box has two slots for circuit breakers, although we only use one slot in our camper.

    Square D Circuit Breaker Box (2-Gang)
    • 30A Main Lugs Load Center
    • Surface Mount, 2 Space Circuit
    • 2 Single Poles
    Circuit Breaker (15A)

    This 15A circuit breaker fits into the breaker box.

    Using this circuit breaker protects your 12/3 AWG wire, which is rated for 20A, from overheating and keeps all your downstream electrical devices safe from surges.

    Square D 15A Circuit Breaker
    • Miniature circuit breaker rated at 15A
    • The current capacity that this circuit breaker is able to interrupt before breaking is 10kA
    • Easy plug on circuit breaker that’s compatible with Square D QO Loadcenters

    Gang Box

    If you want to install a socket into your walls (like at home), you’ll need to pick up a gang box to install behind your walls first. Then the socket gets installed onto this box.

    Gang Box
    • Carlon B114R-UPC Lamson Home Products Number-1G Old Work Box Pack of 3
    • 3-3/4" x 2-3/8" rectangular Hole needed
    • Overall outside dimensions: 4.25" tall, 2.25" wide, 2.75" deep

    Power Outlet & Wall Plate

    There are lots of different wall socket types out there. We recommend going to a hardware store and perusing all the styles. We settled on these particular sockets.

    Once you’ve selected your socket-style, you will need to purchase a wall plate to frame the socket. If you picked up our recommended socket, these walls plates will work nicely.

    125V Outlet with Wall Plate
    • Tamper-resistant (TR) receptacles prevent unwanted objects from being inserted. This child safety...
    • Suitable for residential areas such as homes, apartments, and condominiums. Break-off tab provides a...
    • Installation friendly: Shallow body design so device and wires fit easily into junction box. Push-in...

    Inverter To Shore Power (AC In)

    If you have an inverter/charger combo unit, you will also have an ‘AC In’ slot. This is where power from an external socket (shore power) enters the inverter/charger and charges your camper batteries.

    Wiring diagram connecting inverter to shore power in a camper van

    12/3 AWG Wire

    You can use the same 12/3 AWG wire that you used for the AC Out wiring. This wire is rated for 20A and can handle over 2,200W when connected to shore power.

    Our Recommendation
    Ancor 12/3 AWG Triplex Wire

    Perfect for all 110V wiring. This 'marine grade' wire is perfect for all AC Out connections from the inverter to standard 15A outlets. The tough outer jacket resists cuts & abrasions and like that the copper wires are tinned to resist corrosion.

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    Power Inlet

    The 12/3 AWG wire connects to the back side of this power inlet. The front side of the power inlet faces outside and is connected to a 15A shore power outlet.

    Larger Power Inlets? There are also 30A & 50A power inlets. But 15A is plenty for small and medium-sized electric systems. A larger inlet also means using thicker wires.

    20A Power Inlet
    • ParkPower by Marinco rv front mount 20 AMP, 125V White power Inlet
    • Designed to provide an option to upgrade or replace worn power Inlet connections on boats, rvs,...
    • Use with any standard 20 AMP extension cord

    Extension Cable

    Whichever extension cord you get, make sure your cord contains 12 AWG wires. Many cheaper extension cords usually contain 16 AWG wires, which cannot safely conduct as many amps and have a tendency to get hot when connected to shore power.

    This high quality extension cord works great for battery charging from shore power.

    12 AWG Extension Cord - 50' (Heavy Duty)
    • Ideal for use with heavy duty power tools and appliances, Grounded plug and connector
    • Water, weather, kink & abrasion resistant, flame retardant
    • Works in temperatures from -40°F up to 140°F

    4.4 - Connecting Inverter To Ground

    Connecting Inverter To Ground Point

    The last step is to connect the inverter to a designated ground point on your van’s chassis. Your vehicle’s handbook should have a picture and list of approved ground points you can utilize.

    You can ground the inverter with a single 12 AWG wire and these M10 ring connectors.

    4.5 - 120V Inverter System Summary

    After reading this chapter, you should have a solid understanding of the following concepts.

    • How to calculate your ideal inverter size.
    • Whether or not you want an inverter or an inverter/charger.
    • How to wire an inverter into your camper’s electrical system.

    Still have questions? Check out our other 120V inverter resources:

    Chapter 5:

    How To Charge Batteries While Driving (From An Alternator)

    Being able to charge camper batteries while driving is the second most important battery charging method, after solar power. After a long drive, it’s nice to arrive at a campsite and start the evening with 100% battery charge.

    This is arguably the easiest wiring section of all the chapters that we cover. And by the end of this chapter, you should have a wiring system that resembles the diagram below.

    DC-DC charger wiring diagram (final) connecting the vehicle starter battery to the leisure battery.

    DC-DC Charger

    The 12V DC to DC charger senses when you turn on your vehicle’s engine and begins to send power from your vehicle’s battery to your electric system’s battery bank. The higher the amp-rating, the faster the charge rate to your batteries.

    We like the Victron DC chargers because they work seamlessly between AGM and lithium batteries. And they are also Bluetooth enabled for easy access from your smartphone. Victon’s DC chargers come in 18A and 30A models.

    Fast Charge When Driving
    Victron DC-DC Charger With Bluetooth (30A Rating)

    Charge your leisure batteries quickly with Victron's 30A DC-DC charger (up to 360W). Works great for both lithium and AGM batteries. But the highlight is the charger's Bluetooth connectivity, which pairs with Victron's UI-friendly smartphone app.

    We earn a commission if you make a purchase, at no additional cost to you.
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    Learn more about DC-DC chargers on our product information page.

    6AWG Wire

    To wire either side of the DC-DC charger, we recommend using 6AWG wire. With a minimum amp-rating of 55A, 6AWG will keep your system safe when using most standard DC-DC chargers.

    Make sure you pick up red AND black wire.

    For DC-DC Chargers
    6 AWG Wire (25' Red + Black)

    Recommended size for DC-DC chargers. These 100% pure copper stranded wires are what you'll need. Perfect for high amperage environments (up to 115A)

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    Learn more about 6 AWG wire on our product information page.

    60A Fuse & Holder

    Use a 60A fuse to protect the 6AWG wire from overcurrent situations.

    Protects DC-DC Wires
    Baomain 60A Fuse + Holder

    This 60A ANL fuse pairs with our recommended 6AWG wire for all DC-DC charger wiring. The fuse protects the wire from overheating during over-current situations.

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    Learn more about this 50A fuse on our product information page.

    Copper Lugs

    Copper lugs are used to connect 6AWG wire to the batteries and fuses. The diameter of the ring is dependent on the specific products you want to connect to. Below are our lug size recommendations for 6AWG wire.

    • Car battery: Check your battery for terminal size
    • To/From 60A Fuse: 5/16″
    • To Bus Bar: 3/8″
    Lug Terminal Set (2-8 AWG, M6-M10, 120PCS)

    Save money with this convenient lug terminal set. It covers 12 different lug sizes from 2-8 AWG wires and M6-M10 ring diameters. Heat shrink is also provided.

    We earn a commission if you make a purchase, at no additional cost to you.
    09/16/2023 02:20 am GMT

    For more information, read or post: How To Install A DC-DC Charger In A Camper Van


    Frequently Asked Questions

    "What Tools Do I Need To Build A Camper Electrical System?"

    The following tools are instrumental to building an electrics system:

    "Do You Recommend All-In-One Power Stations?"

    These power stations, like the Bluetti Portable Power Station, are convenient devices that make building a camper electric system quick and easy. And if you have a small, modest-sized electric system and don’t have the inclination to build an entire system from scratch, an all-in-one power station can be a great option.

    Bleutti 2000Wh Portable Power Station
    • [Power Monster] - With the remarkable 2000Wh of capacity and a strong 2000W inverter, this AC200P...
    • [3500+ Life Cycles to 80%] - The ultra-safe LiFePO4 battery cells and premium BMS tech offer...
    • [Efficient Recharging Rate] - AC200P supports up to 700W solar and 500W AC input, allowing you to...

    But convenience comes at a cost. These power stations are relatively expensive for the amount of stored power that you’d be buying. For almost the same amount of money, you can DIY your own battery bank and have 50-80% more power capacity!

    And if you plan a more elaborate electric system with numerous 12V devices, then you really should skip these power stations and build your own system.

    "Do You Recommend Electric Water Heaters?"

    If you have a large enough battery bank and are willing to invest in a 3000W inverter, electric water heaters can be useful addition. However, water tanks do take up valuable storage space and we never took enough showers to justify keeping our tank.

    Bosch Tronic 4-Gallon Water Heater
    • CONVENIENT HOT WATER HEATER: 4 gallon point-of-use mini-tank fits under your sink to provide hot...
    • LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined...
    • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or...

    Unless you plan to build an indoor shower stall, we think skipping an electric tank is the smart option. Instead, opt for a solar shower bag. They’re compact, cheaper, and more convenient to use. You can always boil water to fill the bag if the water isn’t hot enough by the end of the day. We use ours ALL THE TIME.

    "Do You Recommend Induction Stove Tops?"

    Cooking with electricity (as opposed to using propane) can be a viable option but only if you have sufficient battery capacity.

    • If using lithium batteries, we recommend having at least 300Ah of battery capacity (at 12V)
    • If using AGM, we recommend having at least 800Ah of battery capacity (at 12V).
    Duxtop Portable Induction Stove (Single Burner)
    • Duxtop Induction Cooktop uses 120V 15 amp electrical outlet - standard in all North American homes;...
    • Digital control panel. Built-in count-down digital timer with 1 minute increments up to 170 minutes;...
    • With no open flame or heating element, food does not burn-on the glass cooktop so this induction...

    If you’re not installing a battery bank of this size, we think going with a standard propane cook top is the way to go. Propane is cheap and easy to refill. It’s the reason why we usually don’t recommend induction stoves.

    Useful Tip: If you want to extend the lifespan of one tank of propane, pick up an electric water kettle. This way, you can use electricity, instead of propane, to boil water for coffee and tea. This can extend a tank of propane by 10-20%.

    "How Do You Maintain A Camper Electrical System?"

    There are three things we like to do to help keep our camper’s electric system in tip-top shape.

    1. Ensure bolts and screws remain tight: Once every few months, we use a screwdriver and socket wrench to tighten any screws and bolts that may have become loose, due to vibrations from driving.
    2. Ensure proper battery state-of-charge (SOC): Did you know AGM and lithium batteries like to be kept at different SOCs? For example, AGMs love to remain at 100% charge while lithium batteries prefer to be kept around 40-80%. Read our battery maintenance post to learn more.
    3. Prepare for long-term storage: When prepping to store the camper for long periods of time, we shut off our electric system and keep our lithium battery bank at ~50%. For AGMs, we would purchase a battery maintainer (trickle charger) to keep them consistently charged at 100%.

    "Can You Make Me A Custom Wiring Diagram?"

    We’ve recently started receiving several of these custom wiring questions every month and, unfortunately, we need to start declining these requests. We put a lot of love into our wiring diagrams, but they do take up a lot of our time.

    If you are looking for diagrams that are a bit more customized, check out our “Custom Solar Wiring Diagrams” in our eBooks download page. We detail four different solar builds for four different budgets, from <$450 to ~$6,500.

    Electrical System Regrets

    Wires Are Not Secured Properly To Van

    When we laid our electrical wire throughout the van, we simply taped the wires to our van’s frame and insulation boards. Big mistake.

    Next time, we would use a combination of split wire loom and cable zip tie mounts to properly secure all our wires to the van.

    Poor Choice Of 14 AWG Wire Type

    When purchasing our 14AWG wire, we opted for the most flexible wires possible. This led us to these silicone jacket wires. However, these silicone jackets offer much less protection than these much sturdier 14/2 AWG wires, which have an additional outer jacket for extra protection.


    We hope you enjoyed reading our camper van electric system guide and hope you found the information useful. Building your own system takes time and lots of homework, but if you go slow and are careful, we’re confident you can arrive at a successful installation.

    If you have any questions, please feel free to send us an email through our contact page.

    Lastly, be sure to check out our eBooks with useful wiring diagrams. They are a valuable resource and are all completely free to use.

    Happy building!

    Go Back: DIY Camper Van Conversion Guide

    Thank You For Reading!

    We’re Yuko and Eric! We both grew up in Asia ( Japan & Hong Kong ), we left our jobs and homes in 2018 and started traveling full time from Canada to Argentina in our self-converted camper van since end of May 2019. “Asobo” means “Let’s play” in Japanese. We named our site “Asobolife” because the life is always uncertain and we live only once so it’s important to always keep positive, playful mind and enjoy the moment you are in the present. We also want to use this website to share our road trip and van building experiences to inspire our readers. We hope you enjoy!

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