Whether you’re touring or using your caravan seasonally, solar panels can offer a low-maintenance solution to help keep your electrical systems running. But before you get to work, it’s worth understanding the types of solar panels available, how they work, and how to safely install them on your caravan.
Where to install solar panels on your caravan
Let’s start with the best place to install your solar panels—it’s usually the roof of your caravan. Just like a house roof, it’s typically the part that gets the most direct sunlight, making it ideal for capturing solar energy.
Tools you’ll need
The tools you'll need to install solar panels on a caravan roof varies depending on the type of panel being fitted.
Flexible or semi-flexible panels can usually be fixed in place using a strong adhesive. However, framed panels need mounting brackets. These are often included with the panel to make installation easier.
As well as adhesive or brackets, it’s useful to have the following tools on hand:
- Solar panel kit (including charge controller, cables, battery if required, and inline fuse)
- Ladder to access the roof
- Drill and appropriate drill accessories
- Screwdrivers
- Wire cutters or strippers
- Sealant or caulk
- Wrench set
- Spirit level
Dedicated caravan cleaner and a sponge for cleaning the roof surface beforehand
Step-by-step to installing solar panels on your caravan
Installing solar panels on your caravan might seem daunting but taking it one step at a time makes the process much more manageable. Here's how to get everything set up:
Clean the installation area
Start by thoroughly washing the section of the caravan roof where the panel will go. Use warm water and a dedicated caravan exterior cleaner. Let the surface dry completely before moving on.
Confirm your layout and entry points
Position the panel where you plan to install it to check for a good fit. Make sure it’s not obstructed by vents, skylights, or roof curves. Identify a nearby, discreet spot for routing cables into the caravan—ideally somewhere like a cupboard where you can install the charge controller. Mark everything in place with a non-permanent marker.
Secure the panel to the roof
For flexible panels, apply adhesive directly and press the panel into place. For framed panels, use mounting brackets and screws. Apply adhesive to the contact points as recommended, press down firmly, and clean away any excess sealant.
Drill entry points for cables
Drill carefully through the caravan roof at the marked entry point(s). Most panels have a positive and a negative cable, so you might need two holes. It helps to have someone inside the caravan to guide you and protect the interior ceiling.
Feed cables into the caravan
Thread the cables through the drilled holes, keeping the system powered off while you do. Use trunking or a cable gland (if provided) to protect the entry point, and seal it with adhesive and waterproof sealant.
Mount the charge controller
Fix the charge controller to a wall near the cable entry point—ideally inside a cupboard. Use the screws provided in your kit. The controller manages voltage levels and protects your battery from overcharging.
Prepare cable routing to the battery
Cut the panel’s cable to the correct length, allowing a bit of slack for neat routing to the controller and battery. Use existing trunking or tuck cables out of sight where possible. Leave the cable ends disconnected for now.
Fit the inline fuse
Install a fuse on the positive cable before it reaches the battery to add a layer of protection against electrical faults. Use a blade to expose the wire core and follow the polarity markings on the fuse holder. Place it somewhere accessible for maintenance, like under a bench seat.
Connect the panel to the battery
If your caravan already has a cable route to the battery, use that to thread the wires through. Strip the ends of the insulation and get ready to attach them to the battery terminals, but don’t make the final connection yet. If needed, drill a new path to the battery compartment.
Connect the battery to the controller
Inside the caravan, connect the battery cable to the charge controller, making sure the polarity is correct by simply ensuring the positive (+) and negative (-) terminals are matched up between the solar panel and the charge controller, in much the same way as using household batteries. This allows the controller to monitor and regulate the battery’s charge.
Link the panel to the charge controller
Finally, connect the panel’s cable to the controller’s input terminals. Once everything is connected, the system should start working, and the controller should show the current system status.
Common mistakes to avoid
Installing solar panels on your caravan can be a brilliant upgrade, but there are a few common slip-ups that can affect how well your system works. Keeping these in mind from the start can help everything go more smoothly.
Not prepping the roof properly
Skipping a thorough clean before installation can lead to weak adhesion, leaks, or panels coming loose down the line.
What to do instead: Wash the area with a caravan-specific cleaner to prepare for the adhesive.
Choosing the wrong panel size
A panel that’s too small for your needs won’t give you enough power, while one that’s too big for your setup might overload your system.
What to do instead: Estimate your daily energy use and choose a panel that matches. For many caravans, a 200-watt panel does the job, but your needs might vary.
Loose or shaky panel mounting
If panels aren’t fixed securely, they can come loose—especially when you’re on the move.
What to do instead: Use strong, weatherproof adhesive made for caravan surfaces, and don’t be afraid to add mounting brackets for extra security.
Wiring errors
Using the wrong type of cable or making poor connections can cause energy loss—or worse, pose a fire risk.
What to do instead: Follow the panel manufacturer’s guidance on cable size and wiring. Use high-quality connectors, and make sure your system is properly grounded.
Installing in the shade
If your panels are regularly shaded, you’ll get much less power from them.
What to do instead: Aim to mount them in a spot that gets full sunlight for most of the day. Avoid areas blocked by vents, roof boxes, or trees at your usual camping spots.
Maintenance tips for caravan solar systems
To keep your solar setup working well over time, a little regular upkeep goes a long way. Here’s how to keep things running smoothly:
Clean the panels: Dirt, dust, or bird droppings can block sunlight and lower output. Use a soft sponge or brush with water (no harsh chemicals or high-pressure hoses), rinse well, and dry the panels. Aim to clean them at least twice a year—or more if you’re travelling through dusty areas.
Check wiring and connections: Take a quick look every few months to spot any signs of corrosion, damage, or loose cables. Early fixes can prevent bigger issues down the line.
Monitor battery health: Keep an eye on how your battery is charging and discharging. Avoid running it completely flat—especially with lithium-ion batteries—and watch for signs of overcharging or low performance.
Inspect the whole system: Do a full visual check now and then. Look for cracks in the panel, loose mounting brackets, or anything unusual. A professional service once a year can help catch things you might miss.
Park smart: Whenever you can, position your caravan to give the panels the best exposure to the sun. Even small tweaks can make a noticeable difference.
Stay safe: Always disconnect the system before doing any cleaning or maintenance work. It’s a simple step that helps keep you safe.
Common questions about caravan solar panel installations
How long does solar panel installation take on a caravan?
It should take roughly 1-3 hours. It’s advised to get someone to help you with installation to speed up the process.
Can I install panels myself or should I hire a professional?
Although you can legally install solar panels yourself in the UK, it’s generally recommended to hire a professional to ensure installation is safe and efficient.
What’s the cost of a typical setup?
The cost to install solar panels on a caravan typically ranges from £499 for a basic 120W system to around £1,200 for larger or more complex setups . How much you end up paying will depend on factors such as the panel size, type, and complexity of the installation (if you hire a professional).
Specialist caravan insurance from Lifesure
Adding solar panels to your caravan is a great way to become energy efficient, but there are also other considerations to keep in mind, such as having adequate insurance in place. After all, a suitable caravan policy can help to offer peace of mind should something unexpected happen, like theft and damage.
At Lifesure, our touring caravan insurance can protect both your caravan and belongings on the road or at the campsite. For extra security while you travel, you can add RAC touring caravan breakdown cover.
If you want to find out more or get a quote, just get in touch—we’re here to help you find suitable cover for your requirements.
Disclaimer: The sole purpose of this article is to provide guidance on the issues covered. This article is not intended to give legal advice, and, accordingly, it should not be relied upon. It should not be regarded as a comprehensive statement of the law and/or market practice in this area. We make no claims as to the completeness or accuracy of the information contained herein or in the links which were live at the date of publication. You should not act upon (or should refrain from acting upon) information in this publication without first seeking specific legal and/or specialist advice. Arthur J. Gallagher Insurance Brokers Limited trading as Lifesure accepts no liability for any inaccuracy, omission or mistake in this publication, nor will we be responsible for any loss which may be suffered as a result of any person relying on the information contained herein.
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