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How to Hook up Solar Panels to RV Batteries (Charge Anywhere). Rv solar set up

How to Hook up Solar Panels to RV Batteries (Charge Anywhere). Rv solar set up

    Installing Solar Panels on an RV

    Installing solar panels can easily scare many RV owners. But the process doesn’t have to be complicated. Even better, you can do it without drilling holes into your precious vehicle.

    A solar panel system for RVs is one of the best ways to become energy independent and remain off-grid for as long as possible. It means more time on the road and less time hooked up to shore power at the campground.

    Our beginner-friendly guide explains how to install solar panels on your RV, so you’ll be ready to tackle your next road trip.

    We’ll cover everything you need to know about how off-grid systems work, a step-by-step guide on installing the panels on your RV roof, and mistakes to avoid.

    How Off-Grid Systems Work

    Off-grid systems let you run your lights, refrigerator, and other appliances without relying on electricity mains or shore power.

    Unlike on-grid systems, off-grid renewable power does not rely on electricity provided by a local utility company. Instead, these systems use other sources like solar power, wind turbines, hydropower, or fossil fuels to create standalone systems.

    While these are all examples of off-grid systems, they aren’t all applicable to RVs, so here we’ll FOCUS on solar-powered off-grid systems.

    An off-grid solar system includes solar panels, a portable power station, and a balance of systems.

    Let’s take a closer look at each component:

    • Solar panels: Photovoltaic panels capture solar energy.
    • Power Station: The battery in a portable power station stores energy for later use.
    • Balance of Systems: The BOS consists of all the other components besides the photovoltaic modules, including power controllers, inverters, wires, fuses, circuit breakers, etc. Some systems may have some of this equipment built in, such as the inverter.

    Solar-powered systems work when photovoltaic panels capture sunlight and generate DC electricity. An inverter converts the DC energy into AC (household) electricity, which powers most appliances or electronics. The converted energy charges the portable power station, which users can plug into to run electronics and appliances.

    Why Portable Power Stations Make It Easier

    RV owners can use portable power stations or solar generators to store energy and power their appliances.

    Portable power stations with solar capability are also better if you’ve been considering traditional fuel-based generators like gas, diesel, or propane for your electricity backup.

    Portable power stations don’t produce carbon monoxide since no internal combustion engine burns fuel. The toxic exhaust fumes from gas generators pose a serious health risk, making a PPS with solar much safer.

    As an RV owner who travels cross-country or lives remotely, you need a reliable energy source to power your lifestyle. The best option is either portable power stations or solar generators. These units don’t require you to rely on gas, which can be costly or in short supply.

    Full-time RVers looking for a more permanent or robust solution should consider solar power systems with expandable battery capabilities, like the EcoFlow Modular Power Kits. With each battery containing 5kWh of storage, you can stack up to three batteries for 15 kWh of power. The EcoFlow Modular Power Kit comes with a Power Hub that saves space and simplifies installation.

    What You’ll Need Before Installing the Solar Panels

    Before beginning your RV solar panel installation, you’ll need to gather the following:

    • Solar panels
    • Portable power station
    • Strut channel
    • Brackets
    • Drill
    • Adhesive tape
    • DC wires
    • Wire stripper

    How to Install Solar Panels on an RV

    While installing solar panels on an RV roof isn’t required, a roof-mounted solar system allows you to collect energy while traveling on the road.

    You have a few options for mounting solar panels on an RV:

    • Fixed mounting: Fixed mounting systems are designed for rigid solar panels and require drilling holes on the RV roof. Then you’ll need to install mounting brackets to fix the panels in place on a flat position on top of the fixed mounting system.
    • Flexible mounting: Flexible solar panels (thin-film) adapt to the shape of the RV, making them easy to install on any RV roof. You’ll use adhesive tape to set the panels in the proper position. However, you may have to drill a hole into the roof to feed the cables into the RV, but this installation will only require one hole.
    • Tilt mounting: Instead of fixing the solar panels in a flat position, you would install them using a tilted position. A tilting platform lets you adjust the angle of the panels for optimal sunlight capture. This mounting system improves light absorption, thus yielding a greater power output.

    This instruction guide will cover how to mount rigid solar panels, which have a greater energy efficiency than flexible panels.

    Also, a fixed mounting installation creates space between the solar panels and the roof. Since solar panel performance is significantly affected by temperature, you’ll get the most out of your panel with fixed mounting.

    What to Avoid When Installing Solar Panels

    When installing solar panels on your RV, there are a few things you’ll want to avoid to optimize performance.

    • Roof obstructions: Avoid placing your panels too close to the roof’s edge to reduce the risk of accidental damage. Keep the panels free from obstruction by other items installed on your RV roof.
    • Improper Tilt Angle: Adjust the tilt angle for the most direct sunlight. Ideally, the installation tilt should be above 10 degrees to avoid dust accumulation and buildup.
    • Electrical Wiring Hazards: Don’t accidentally drill into any electrical wiring while mounting your panels, as this could risk electric shock and create a fire hazard.

    Avoid Installing Campervan Insulation

    While many people recommend using insulation tape as a seal for sticking solar panels on your roof, we advise against it. That’s because insulation tape doesn’t protect against water ingress.

    Sticking cells together likely reduces the panel’s efficiency to some extent, so doing so can end up costing you power over time.

    Also, you could tear the insulation if you’re trying to remove the offending objects from your panels.

    If you go with adhesives for installing flexible solar panels, ensure that it’s strong enough to withstand all types of weather.

    The adhesive should stick well in hot and cold conditions, even when condensation forms on metal surfaces. Your panels must be adhered to properly to prevent them from moving around or flying off when driving on bumpy roads.

    Also, don’t use too much adhesive since that can block off ventilation points. Using excessive adhesive can restrict airflow affecting the temperature and making the panel too hot or cold, thus reducing its lifespan.

    How Much Does It Cost to Install Solar Panels on an RV?

    For many RV owners, the initial costs of solar panels and a solar power system cost can deter them from taking advantage of off-grid systems and their cost-saving benefits.

    Typically, a single solar panel can range between 200 to 1,100 depending on its construction quality, efficiency, size, and panel type.

    Those who wish to run everything except an air conditioner, microwave, and fridge may only need a 400-watt system. A system like this may cost 3500 to 4,500. The cost includes a 400w solar panel, all the installation equipment, and other solar power system components.

    However, the more power you need, the more panels and larger batteries you’ll need to buy.

    For example, if you have a small, portable setup like the EcoFlow River 2 and 110W portable solar panel, you might only pay in the range of 450-650. The cost increases depending on the battery capacity and the more solar panels you add. The River 2 Max and River 2 Pro both offer more capacity and a higher wattage solar panel but cost more. With one 110W panel and 256Wh capacity, that’s enough to power small devices like a 110W TV, 10W lights, and your laptop.

    On the other end of the spectrum, if you want to get a high-capacity solar generator like the EcoFlow DELTA Pro and a 400W portable solar panel, you’re looking at paying around 4000-9000. The price goes up in direct proportion to the battery capacity and the number of high-power solar panels you add.

    Keep in mind this doesn’t include any mounting equipment or electricians you’ll need to hire to mount the panels on your roof.

    How Many Solar Panels Do You Really Need?

    In most cases, one solar panel won’t be enough to maintain your RV lifestyle. Everyone is unique in their power consumption needs, so your best bet is to weigh the various factors that affect your power consumption.

    Let’s consider the factors to help you determine how many solar panels you need.

    • Energy consumption: Knowing how much power you’ll consume daily is crucial to ensuring you have enough solar panels. The solar panel’s job is to keep the battery fully charged to support your lifestyle.
    • Available daily sunlight: Peak sun hours measures how much sunlight an area receives. For example, a person in Florida has more peak sun hours per day than someone in New York during the winter.
    • Watt rating: Panels with higher rated power wattage mean you’ll need less. For example, it takes four 100W solar panels to equal the output of one 400W panel.
    • Angle: The positioning of panels can affect their power output. In particular, the angle of the solar panel in relation to the sun determines the maximum power density.
    • Shade: Consider any shading that your panels might be under. Shade decreases the energy efficiency of the panel by blocking sunlight. The cells under the shadow won’t be able to produce as much electricity.

    Buying Solar Panels for an RV

    Not all solar panels are the same. You’ll need to consider the type of panel and the best options based on your situation.

    Here are things you should keep in mind when buying solar panels for an RV:

    What Are the 3 Types of Solar Panels?

    Solar panels fall into three categories: monocrystalline, polycrystalline, and thin film. These panels vary in performance, production, cost, and installation.

    Monocrystalline solar panels offer the highest efficiency ratings within the industry. These panels convert about 20% of their sunlight into electricity. Some of the most efficient panels, like the EcoFlow Rigid Solar Panels, now have up to 23% efficiency.

    Monocrystalline panels are perfect for RVs since there’s limited roof space, allowing you to maximize the amount of electricity captured per square foot. The only downside is that monocrystalline panels have a higher initial cost. But that will be offset over time by providing more electricity.

    Polycrystalline solar panels are less efficient and fall below 17% in efficiency ratings. However, they’re more affordable. These panels can be a good, entry-level budget option.

    Thin film solar panels aren’t like monocrystalline and polycrystalline panels, which both use silicon cells. The thin film PV panels use material layers rather than rigid cells, making them lightweight and flexible.

    Unfortunately, thin film panels are the least efficient. They require a lot of roof space and tend to degrade faster, so they’re likely to have shorter warranties.

    Best Solar Panel for RVs

    Monocrystalline is the best choice when selecting solar panels for your RV, giving you the

    highest efficiency ratings and longevity.

    Take the EcoFlow 400W Rigid Solar Panel, for example. It features a foldable one-piece with an IP68 waterproof rating to protect against all outdoor elements, including dirt, debris, and water. The panel is constructed with an anti-corrosive aluminum frame to withstand wind speeds of up to 130 mph and a snow load of up to 113 lbs, meaning it’ll continue to capture solar energy even in harsh weather conditions.

    Whether you have a Class A, B, C, or trailer, the 400 watts of power output gives you plenty of energy to power your appliances. Assuming your location receives five peak sunlight hours, you’ll receive at least 2,000 watts for each 400W rigid solar panel you install. Packed with monocrystalline cells, the panels have a high-efficiency rating of 23% so that you can charge your PPS fast.

    The solar panel size is also a critical consideration. The EcoFlow 400W rigid solar panel measures 67.8 inches in length. Most RVs run between 19 and 41 feet in length. Assuming you place the panels horizontally, you could fit three 400W portable solar panels on a 19-foot RV.

    Here’s how we calculated that:

    hook, solar, panels, batteries, charge
    • 19 feet (228 inches) = Length of RV
    • 228 inches/67.8 inches (length of solar panel) = 3 solar panels

    Furthermore, you can install EcoFlow’s 50” tilt mount bracket, which secures your panel at a tilted angle. Tilting solar panels helps maximize the sun exposure for longer than when placed horizontally or vertically.

    hook, solar, panels, batteries, charge

    Best Flexible Solar Panel for a Camper Van

    Flexible solar panels are better for campers since they are much smaller. The flexible design allows the solar panels to mold to the camper’s roof and requires less flat surface area.

    The EcoFlow 100W Flexible Solar Panel is an excellent flexible solar panel for campers where installation space is at a premium. It offers a durable design for long-lasting performance. The highly protective tempered glass and lamination coating protect the monocrystalline cells from getting damaged from inclement weather like torrential downpours.

    Unlike traditional panels, which require brackets and drilling holes, the flexible panel features pre-cut eyelets that can be hung with hooks or securely fastened to the RV roof using an adhesive.

    These panels flex up to 258 degrees and can fit the unique shape of your RV fit. This means you can place more solar panels onto your roof since they can seamlessly fit into the natural curvature of your RV. Since they only weigh 5.1 pounds, it’s easy to adjust and move around than traditional bulky solar panels.

    The EcoFlow 100W Flexible Solar Panel has a protective case and a solar cable for universal compatibility. It can be readily connected to any third-party solar system so that you can charge up portable power stations or 48v power systems.

    Frequently Asked Questions

    Below, we’ll answer the most frequently asked questions about installing solar panels on an RV.

    The installation depends on if you opt for rigid, flexible, or portable solar panels. You’ll need to drill holes and install channel struts for a rigid solar panel. Flexible solar panels only require adhesive tape. But portable solar panels make it even easier by allowing you to move the solar panels, place them on the ground and transport them in a convenient kickstand case.

    Most RV solar panels range between 100 watts to 400 watts. The number of panels depends on environmental conditions and your power consumption needs.Some areas receive more sunlight than others. If you live in Arizona, there’s a good chance you’ll receive more direct sunlight than in a state with less sunshine, like Washington. Let’s say you live in an area with six hours of peak sunlight. Using the EcoFlow 400W Portable Solar Panel, you’d get approximately 2400Wh daily from a single panel. If your total power consumption is 10,000Wh for all of your appliances, you’ll need five panels to meet your energy requirements.

    Yes! RVs typically use smaller solar panels with mounting holes designed specifically for RVs, campers, and vans. Since they’re smaller, it allows you to fit the panels onto your roof better.If you want more versatility, you can opt for the EcoFlow Portable Solar Panels. They feature monocrystalline cells with a 23% efficiency rating to help maximize the amount of direct sunlight received. These stands fold out, meaning you aren’t limited to using them for your RV — take them with you for camping, backpacking, and off-grid living.

    Yes, it’s possible! Using corner brackets, you can mount solar panels on RVs without drilling holes in the roof. The combination of mounting brackets and adhesive allows for easy and fast installation. Also, you can easily remove or reposition the panels if needed. However, adhesive and mounting brackets won’t be as secure as drilling into your RV roof. Therefore, you may want to consider drilling holes, especially in areas with heavy winds or severe weather.


    With new designs in solar panels for RVs coming out every year, there’s never been a better time to go off-grid. Follow the instructions above to install solar panels on your RV and enjoy renewable energy no matter where the road takes you.

    EcoFlow is a portable power and renewable energy solutions company. Since its founding in 2017, EcoFlow has provided peace-of-mind power to customers in over 85 markets through its DELTA and RIVER product lines of portable power stations and eco-friendly accessories.

    How to Hook up Solar Panels to RV Batteries (Charge Anywhere)

    The sun is a free and abundant source of energy. It can power homes and offices and even power your RV!

    This convenient energy source allows you to charge your RV batteries and power your electrical devices without a generator and in spots where shore power isn’t an option (think boondocking).

    And adding solar panels to your recreational vehicle is much easier than you might have thought.

    This step-by-step guide will show you exactly how to hook up solar panels to RV batteries and charge them anywhere your next adventure takes you!

    What Size Solar Panel Do I Need to Charge My RV Battery?

    Before we jump into how to hook up solar panels to your RV batteries, let’s first quickly calculate the size of the solar panel(s) you’ll need to charge your batteries and power the accessories and appliances in your RV.

    I like to keep things as simple as possible. In most cases, a 200 to 400-watt solar panel setup will be enough to charge your RV batteries, providing there is direct sunlight.

    At the bottom end of the range, a 200-watt system should be sufficient for very basic power needs – lights, fans, propane appliance electronics, phone chargers, etc. Now, let’s throw in a television, microwave, and other higher-power electrical items, and you’ll likely need closer to 400 watts (or more).

    There are many solar calculators online to help you figure out your solar wattage requirements, but there are so many variables at play that they are just guesses at best. Essentially, the calculators try to match the electric power requirements of your recreational vehicle with the power output of your solar cells.

    But the only accurate way to tell is to test out your system in the wild. And if you’ve laid the proper groundwork for your solar power setup (which we show you how step-by-step below), you’ll be able to quickly expand your system with additional solar panels if needed.

    How to Hook up Solar Panels to Your RV Batteries Step-by-Step

    Hooking up solar panels to your RV batteries is a straightforward process. Simply put, your solar panels sit outside your RV, soaking up the sun’s energy, wires carry that energy to the charge controller in your RV, and lastly, wires connect the charge controller to your RV batteries, charging them.

    It’s that simple. But, to install solar panels, we’ll first need a few supplies.

    What You’ll Need

    • Solar Panel(s) – at least 200 to 300 watts (you can wire multiple 100w solar panels in parallel)
    • Solar Charge Controller
    • 10AWG Solar Panel Connectors Adaptor Kit
    • 10AWG Tray Cable
    • 12v battery (If needed. We like this Renogy deep-cycle, 100 amp hours battery)
    • Optional: Mounting brackets
    • Optional: Inverter (DC to AC power inverter to power your 120-volt AC appliances)

    We highly recommend using the Renogy Complete RV Solar System Kit that comes with everything you need (minus the RV battery and optional inverter) to get your solar charging system up and running! Renogy has put together one of the highest-rated off-grid RV solar systems on the market today.

    Clicking this link to make a purchase may earn us a commission at no additional cost to you.

    Tip: To get the most out of your solar energy system, you’ll need a high-quality battery! Check out our picks for the best RV battery for boondocking to find the right battery for you and your camping needs.

    Installation Instructions

    • Connect the battery to the charge controller using the tray cable. The red wire goes into the positive port, and the green wire goes into the negative port of the charge controller. Tighten the screw connections. Then connect the other end of the tray cable to the battery (red connects to the positive terminal, green to the negative). Important: Be sure you do this step first so as not to cause irreversible damage to your solar system components!
    • Connect the solar panel MC4 female connector to the adaptor kit’s MC4 male connector. Then, connect the solar panel’s MC4 male connector to the adaptor kit’s MC4 female connector.
    • Connect the negative solar panel line to the negative solar terminal of the charge controller. Then, connect the positive solar panel line to the positive solar terminal of the charge controller. You may have to strip the ends of the wires 3/8″ to connect them to the charge controller. Tighten the screws on the charge controller to ensure a tight connection.
    • Optional: Once everything is properly hooked up, we can now connect the inverter by first connecting the negative battery terminal to the negative port of the power inverter. Then, connect the positive battery terminal to the positive port of the power inverter.

    Are you more of a visual learner? Check out this video for a step-by-step breakdown to hook up solar panels to your RV batteries.

    Important: Be sure to read and follow the directions with your specific solar panel kit, as each kit may have different installation instructions and requirements.

    One last consideration is where you plan to put your RV solar panels. You have a few different options:

    • RV Roof-mounted: Using the optional mounting kit, you can attach your solar panels to the roof of your RV, travel trailer, or camper van and use a cable entry plate to run the wires down into the rig.
    • Manual setup: Alternatively, you can manually set up and plug in your solar panels outside whenever you want to use them. Then pack them up and store them when not in use. If you go this route, remember your charge controller needs to be mounted inside your RV, out of the weather. One option is to mount the charge controller in an easily accessible storage bay close to your RV batteries, if possible.

    That’s all there is to hook up your portable solar energy system! And don’t forget, you can make the DIY process a lot easier by using the Renogy RV Solar Panel Kit, one of the best solar panel systems for RV battery charging we’ve worked with.

    Clicking this link to make a purchase may earn us a commission at no additional cost to you.


    Can I Connect a Solar Panel Directly to a Battery?

    Connecting a solar panel directly to a battery (or bank of batteries) might work if the solar panel is extremely low wattage (5 watts or less), but it’s not recommended. You will want to use a battery charge controller to safely charge your camper battery for optimal performance and lifespan.

    How Many Solar Panels Does It Take to Charge an RV Battery?

    The number of solar panels needed to charge an RV battery depends on factors such as daily energy consumption, battery capacity, solar panel power output, and location’s average sunlight hours. That said, you’ll generally want 300 watts of solar panel power for every 100ah of battery capacity.

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    How to Hook up Solar Panels to RV Batteries

    No problem, I hear you say, just fire up the solar panel. And you’re not wrong. The majority of RVs, camper vans, and caravans have solar power capacity to one or another extent, and rightly so. Solar power guarantees you the freedom to camp wherever the fancy takes you.

    That said, the process of setting up your first RV solar panel can be confusing at first. Particularly how to hook up solar panels to RV batteries. Don’t sweat it though. We’re going to run you through a step-by-step guide on how to get the sunshine into your RV power grid.

    Let the sunshine in. Getting natures bounty into your batteries.

    The point of the solar energy sword is the solar panel. Solar, or photovoltaic (PV), panels convert solar radiation into electrical energy which can be used directly or stored in batteries. Now, solar panels for the RV are typically mounted on the roof of the vehicle or on mobile frames.

    Whichever way you have chosen to install your solar panels, you’ll need to get their output to your batteries. A solar panel system produces a low voltage, typically 12 or 24 volt, direct current (DC) output. That output is stored during daylight hours in one or more high amp hours LiPo or lead-acid battery banks.

    That’s great if you are only using DC appliances in the RV or camper van. What about the microwave, TV or air conditioner though? Many appliances in your RV are conventional 120-volt alternating current (AC) devices. So, not only do you have to store the panels’ energy, but you need to convert it to high-voltage AC.

    RV solar systems: The basics

    RV solar systems typically consist of four separate sections which are:

    Generation is the job of the solar panel. They “harvest” solar radiation and generate electrical energy. As mentioned earlier this energy is a low voltage DC output.

    The charge control section is the domain of a solar charge regulator or controller. This device takes the output from the solar panels and charges the batteries. Its main function is to ensure that the batteries are correctly charged, in particular, that they are never overcharged.

    The storage function is pretty self-explanatory. This is the battery’s turf and their job is to store the solar panel output for later use, especially after dark. The battery’s energy can either be used to directly power DC appliances or converted to main power as described below.

    The inversion section is where the low voltage DC battery power is converted to 120 volt AC by the inverter. The inverter output will typically be wired directly into the RV outlet socket circuit. In addition, most inverters also have a couple of auxiliary outputs if you need more outlet capacity.

    Pictured below is a basic solar layout.

    How all the parts fit together

    Let’s check out how it all comes together.

    The RV solar panels

    At the heart of the system are the RV solar panels. These gather solar power and convert it to a low voltage DC electrical current. This electrical potential is then sent downstream to the charge controller.

    The charge controller

    Solar charge controllers usually have 4 main connections. These are the positive and negative solar panel inputs and the positive and negative battery outputs. The output leads from the solar panels are connected to the panel inputs on the controller (A) as illustrated below. Then a set of leads are used to connect the controller battery outputs to the battery itself (B).

    Many charge regulators also have a separate set of connections for hooking up DC appliances directly to the controller (C). Charge controllers may be pulse width modulation (PWM) or maximum power point tracking types.

    The battery

    The LiPo or lead-acid batteries are now connected to the primary charging source. The charge controller will charge the batteries correctly, avoiding overcharging, during the day. At night the controller will prevent stored energy in the batteries from flowing back into the solar panel array.

    Any DC appliances you have in the RV can be connected via fuses and suitable outlets directly to the battery. Alternatively, low demand devices can be connected to the controller if it features suitable outlets.

    The inverter

    The inverter inputs are connected directly to the battery terminals as indicated below (B). It then boosts the low voltage input to 120 volts and converts the DC waveform to an alternating polarity AC output. That AC output is then wired into the RV grid or extended out of the vehicle for external mobile devices (A).

    Supplemental devices and equipment

    This is all a fairly simplistic overview of how to hook up solar panels to your RV batteries. There are several other pieces of equipment that are commonly included at various points along the way.

    Battery maintainers

    A battery maintainer is basically an AC-fed battery trickle charger. They are connected to shore power when it’s available and slow-charge the battery at night or in low light conditions.

    Combiner boxes

    The combiner box is typically located between the RV solar panels and the charge controller. They serve to “combine” the inputs of multiple solar panels while offering electrical protection through fuses or circuit breakers.

    Quick disconnect switches

    Quick disconnects offer the additional protection of central isolation for the RV solar panels in case of emergency. It’s also a good idea to make sure similar isolation is installed on the inverters’ AC output.

    The wrap-up

    The RV solar system differs little in layout and structure from most home-based on or off-grid systems. In essence, the RV solar panel is hooked up to batteries via a charge controller. The battery output is then fed to an inverter that produces the AC power requirements of the RV.

    RV Solar Installation DIY Made EASY (Step By Step Guide for Beginners)

    In this guide, I will explain how to do an RV solar installation DIY. With this beginner’s guide providing step-by-step instructions and a high-level overview, even those without technical knowledge can assemble solar panels, batteries, and other components for an eco-friendly and cost-effective off-grid solution.

    By performing a DIY solar installation on your RV rather than hiring a professional you will be able to save money. In addition, you will also gain a better knowledge of your solar system: this can come in handy in case of any future issue while camping. The good news is that by following my step-by-step guide and a high-level overview, anyone can perform this task without needing to know all the technical details!

    The setup includes assembling solar panels, charge controllers, batteries, and inverters. This DIY solar setup provides an eco-friendly and cost-effective solution for RV owners.

    RV Solar Installation DIY: Preparation

    Before to start installing a solar system in a camper van or RV, let’s make sure that you have all the needed components and tools! In addition, I will give you a quick guide for your solar RV setup and how to properly size your RV solar system. Then you will be ready to proceed with the RV solar panel installation.

    If you already have all the necessary components for your solar setup, you can skip this section.

    Equipment Needed

    Now, let’s dive into the equipment you’ll need for your DIY solar setup!

    Solar Panels

    • Plan out the placement of your solar panels and ensure they fit correctly.
    • Make sure each panel can be securely fastened with mounting brackets.

    It’s important to triple-check these steps to avoid any potential mishaps and ensure maximum efficiency for your solar system.

    I wrote a dedicated guide with the best RV solar panels, you should check it out if you didn’t purchase your panels yet.

    Charge Controller

    The charge controller is connected to the solar panel and regulates the voltage and current coming from the panel to the battery. It’s important to have the correct size of the charge controller for your solar panels and batteries.


    When selecting batteries, remember to calculate how much energy your devices require and how long you will use them. Batteries come in different sizes, and it’s essential to choose the right size for your rig: make sure that the batteries can fit in the desired location in your RV.

    hook, solar, panels, batteries, charge

    I also wrote extensively about the best RV batteries for solar, given the required investment, you should have a look at this detailed guide to avoid any costly mistakes.


    An inverter/charger is a must-have if you want the comfort of home inside your RV. It converts DC power from the battery to AC power used by your devices. Ask yourself what devices you plan to power and how much you want it to feel like home.

    Other Necessary Accessories

    For the proper setup of your system, in addition to the key components, don’t forget to gather the necessary cables, connectors, and fuses that are appropriately sized to fit your equipment requirements. To properly install everything, be sure to have a screwdriver, socket wrenches, and small/large crescent wrenches on hand to assist in completing all the connections with precision.

    Sizing the Solar System for Your RV

    Sizing the solar system is the most crucial part to prepare your installation. It involves calculating your energy needs and selecting appropriate components. You need to know how much energy your devices require, how many hours you’ll be using them, and how many days you plan to stay off-grid.

    Calculating Energy Needs

    Before installing a solar power system, it’s important to assess your energy needs. This involves determining how much electricity you use on a daily basis, especially when you’re off-grid. Your energy requirements will vary depending on what appliances you plan on using, how many people will be traveling with you, and what time of year it is.

    Here’s how to calculate your daily energy needs:

    40 watt 24h 27 watt 2h = 1,014 Wh = 1 kWh

    So your daily consumption is 1 kWh, however, there are some inefficiencies to account for, so it is standard practice to increase this value by 20%. This means that your solar system should be able to produce about:

    1 kWh 1.2 = 1.2 kWh

    This means that if in your area you have about 5h of peak sun per day, you will need at least 1.2 kWh / 5h = 240 watts of solar panels to replenish the consumed electricity every day. This can be rounded up to 300 watts of solar, just to get a bit of resilience.

    Finally, to calculate the size of the battery you need, simply divide your required power by the voltage of the battery bank. For example, if you have a 12V battery:

    1.2 kWh / 12 V = 100 Ah

    So you will need a battery bank with a capacity of about 100 Ah to power the above appliances. Depending on your needs, you can increase the battery capacity if you want to be resilient to bad weather.

    There you have it, now you know how to size the solar system for your RV based on your expected energy consumption.

    Selecting Appropriate Components

    Once you have an estimate of your energy consumption, you can choose the appropriate components for your solar power system. The first component you need is solar panels.

    When setting up a solar panel system, it’s important to choose the right panel and charge controller. The panel should be powerful enough for your needs, and the controller should regulate energy flow and protect your batteries from damage. Ensure they are compatible with each other to ensure optimal performance.

    Parallel VS Series solar panel installation

    The installation type can also influence the efficiency of your system. If you are installing solar panels in an area that could be subject to shade, you should opt for a parallel installation or a hybrid serial and parallel system. This is because with a series installation if one of your solar panels is shaded, then you will lose the power from the entire array.

    When you connect your solar panels in series if one of the panels is not working because it is being shaded, the panel will interrupt the circuit, therefore also all the power that could have been generated by the other connected panels will be lost.

    This doesn’t happen if you connect the panels in parallel. However, the installation in parallel is more challenging because you will need to install a combiner box or a branch connector and make that waterproof. In addition, you will require a larger charge controller to handle the combined currents. This can get pricey!

    A popular solution to reduce shading issues is having panels installed in 2 or more series. For example, you can have a series at the front and one at the back of the RV. Those 2 series can then be connected in parallel to the controller (hybrid system). In this way, if only the front of your camper is shaded, you will only lose the power generated by the solar array that is there, while the rest of the panels will keep working.

    But by far the best solution for shading problems (if you can afford it) is to have one solar charge controller per panel. In this way, only the shaded panel will be cut off, while the others will keep producing electricity. This all depends on how many partial shading issues you expect to have during your trips.

    Note that a hybrid installation will also protect you against the fault of a panel or wire, because if your panels are all in series, any fault along the series will result in you loosing the entire array.

    Your installation type will determine the number of solar charge controllers needed for your system.

    Solar Installation Instructions for RVs

    Once you decided how to wire your solar panels and you have all the necessary components, you can start the installation. This is quite straightforward as long as you are careful with what you are doing.

    Mounting and Securing the Panels

    Mounting the solar panels securely on your RV’s roof is crucial for optimal performance. After measuring and working out where the panels will go, attach the mounting brackets to each panel, making sure they are level and secure.

    Then, use self-tapping screws to attach the mounting brackets to the roof, taking care not to drill too far and damage the roof underneath.

    Wiring the System

    Wiring the solar power system involves getting wires from the roof of the RV to the battery compartment. This can be the most challenging part of the installation process.

    It’s important to use the correct gauge wires, and wiring the panels in series or parallel can optimize the energy output. Once the wires are securely routed, connect them to the charge controller, batteries, and inverter.

    When connecting the components, make sure to respect the polarity of the components or you risk making costly damages.

    Also, you should be using a fuse on the circuit going into the battery for safety reasons, and a switch to turn off the power to the solar controller when needed.

    All external cabling should be 100% waterproof. Use solar cables, and the connectors need to be specific to be sure that the cables are watertight. Also, ensure that the clamping tools and connectors are the right size to avoid damage to the cables.

    Remember to seal correctly the entire installation and make it waterproof. The last thing you want is a leaking RV roof or a short circuit in your solar system!

    Connecting the Components

    • Cover the solar panels so that they don’t receive any light.
    • Connect the charge controller to the battery.
    • Connect the inverter to the battery.
    • Connect the solar panels to the charge controller.
    • Uncover the solar panels and check if everything is working fine.
    • Plug in your devices and appliances.

    There you have it! If you did everything correctly, you finished your RV solar installation DIY.

    Testing and Maintenance

    Troubleshooting Common Issues

    To keep your solar power system running smoothly, regular maintenance and troubleshooting are essential. Common issues include wiring problems, faulty connections, and low battery voltage.

    Be sure to test your system regularly and address any issues promptly to prevent damage to your equipment.

    Regular Maintenance

    Regular maintenance such as cleaning the solar panels and checking the charge controller and battery levels can prolong the lifespan of your solar power system. It’s important to keep your system in good condition to prevent costly repairs and ensure that you always have power when you need it.


    How many solar panels for RV power?

    If you’re looking to power your RV using solar panels, you need to think about your battery’s storage capacity. As a general rule, you’ll want around 300 watts of solar panel power for every 100 Amp Hours of battery storage. So, if you’re using two 12-volt batteries with a total Amp Hour of between 200 and 250, you should aim for at least 600 watts of solar panel output.

    Number of solar panels for 50A RV?

    If you have an RV with 50 amp-hour battery storage, you’ll need around 150 watts of solar panel power to keep it running. This can be achieved with one or two 100 watt solar panels, which will provide enough energy to recharge your RV’s batteries during the day and keep them topped up overnight. It’s important to match the wattage of your solar panels with the capacity of your battery bank, to ensure that you have enough power to meet your needs. Using a solar calculator can help you determine how many panels you need for your RV.

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    And there you have it – your very own RV solar installation DIY! With just a few basic tools, a little bit of elbow grease, and this beginner’s guide, you’ll be well on your way to harnessing the power of the sun. Not only will you be reducing your carbon footprint and saving money on electricity, but you’ll also be able to enjoy the freedom of not being tethered to traditional power sources.

    hook, solar, panels, batteries, charge

    If instead, you want a portable solar generator, then there are interesting solutions available in the market, check it out in my other blog post.

    So what are you waiting for? Grab your toolkit, roll up your sleeves, and start building your own sustainable energy source with RV solar installation DIY. Who knows – you may just inspire others to follow in your footsteps and make their own contribution to a cleaner, greener world!

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