Portable Solar Panels for Campervans: When They Make Sense
Roof-mounted solar panels are the standard for campervan builds, but portable panels offer a flexibility that fixed panels cannot match. You can angle them towards the sun, move them out of shade, and use them on vans where roof mounting is impractical. They also make an excellent supplement to a fixed system when you need extra power.
This guide is part of our complete campervan solar setup guide. Portable panels work differently from fixed panels in several important ways, and understanding these differences helps you decide whether they suit your van life setup. Our free calculator can size your total solar needs — then you can decide how much of that to put on the roof and how much to keep portable.
How much solar do you actually need?
Our free calculator sizes your total solar requirement based on your daily usage. Use the result to decide the right split between roof-mounted and portable panels.
Types of Portable Solar Panel
Foldable Panels
Foldable panels consist of two or more monocrystalline panel sections hinged together in a fabric or aluminium case. They fold flat for storage and open out to expose the full panel area.
| Feature | Typical Specs |
|---|---|
| Common sizes | 100W, 160W, 200W |
| Folded dimensions | 550 x 470 x 50mm (100W) |
| Weight | 4–8 kg |
| UK price | £100–£250 |
| Efficiency | 18–22% |
| Kickstand | Usually included |
Pros: Compact storage, built-in kickstand for angling, lightweight, quick to deploy.
Cons: Fabric hinges can degrade, smaller total area per watt, more expensive per watt than rigid.
Suitcase (Briefcase) Panels
Suitcase panels are two rigid glass panels in an aluminium frame that fold together like a briefcase. They are heavier and bulkier than foldable panels but more durable and efficient.
| Feature | Typical Specs |
|---|---|
| Common sizes | 100W, 200W |
| Folded dimensions | 680 x 510 x 65mm (100W) |
| Weight | 8–14 kg |
| UK price | £120–£280 |
| Efficiency | 19–22% |
| Kickstand | Usually included |
Pros: Rigid construction, better durability, glass front surface (self-cleaning), true panel performance.
Cons: Heavier, bulkier to store, more awkward to carry.
Flexible Rollable Panels
Thin-film or lightweight monocrystalline panels that can be rolled up for storage. These are less common but offer extreme portability.
| Feature | Typical Specs |
|---|---|
| Common sizes | 50W, 100W |
| Rolled dimensions | 150mm diameter x 500mm (100W) |
| Weight | 1.5–3 kg |
| UK price | £80–£200 |
| Efficiency | 15–19% |
| Kickstand | Not included (needs propping) |
Pros: Ultra-lightweight, tiny storage footprint, good for backpacking or kayak camping.
Cons: Lower efficiency, need external support to angle, less durable, expensive per watt.
Portable vs Roof-Mounted: The Honest Comparison
| Factor | Portable | Roof-Mounted |
|---|---|---|
| Setup time | 2–5 mins each use | Zero (always deployed) |
| Optimal angle | Yes (adjustable) | No (flat on roof) |
| Shade avoidance | Excellent (move to sun) | Fixed (stuck with shade) |
| Security | Must be attended | Secure on roof |
| Weather | Must be retrieved in storms | Always deployed |
| Output per watt | Higher (due to angling) | Lower (flat mount) |
| Capacity | Limited by portability | Limited by roof space |
| Theft risk | Higher | Very low |
| Storage space | Takes up interior room | No interior space used |
| Passive charging | No | Yes |
The 30% angle advantage
A portable panel angled at 30–40 degrees towards the sun produces roughly 20–30% more energy per day than an identical panel mounted flat on a roof. In a UK winter, when the sun is low, the advantage can exceed 40%. This is the single biggest reason to consider portable panels as a supplement to your fixed system.
When Portable Panels Make Sense
Your Van Has Limited Roof Space
Small vans like the VW Caddy, Citroen Berlingo, Ford Transit Connect, and even VW Transporter T5/T6 have limited roof space once a fan and perhaps a roof rack are fitted. A portable 100W or 200W panel stored inside and deployed when parked gives you solar without compromising roof real estate.
You Park in Shaded Spots
If you often park under trees, next to buildings, or in sheltered spots (harbours, forest car parks, mountain passes), your roof panels may be significantly shaded while there is clear sky just a few metres away. A portable panel can be placed in the sun while your van stays in the shade — comfortable for you, productive for your battery.
You Want a Winter Boost
In a UK winter, the sun is so low that flat roof-mounted panels are deeply inefficient. A portable panel angled towards the low winter sun can produce two to three times more than the same panel flat on the roof. For winter vanlifers, a portable panel as a supplement is one of the most cost-effective upgrades available.
You Are Testing Before Committing
If you are not sure whether solar will meet your needs, a portable panel with an integrated charge controller is a low-commitment way to test. You can connect it to your battery through the van window or a through-wall socket without drilling any holes. If it works for you, upgrade to a permanent roof installation later.
You Have a Pop-Top or Elevating Roof
Vans with elevating roofs (VW California, custom pop-tops) have the complication that roof-mounted panels would interfere with the pop-top mechanism. Portable panels are often the only practical solar option for these vans.
Connection Methods
Direct to Charge Controller
The most efficient method. Run a cable from the portable panel through a window seal or a dedicated external socket to your MPPT or PWM charge controller inside the van.
- Through a window: Quick but inelegant. Use a flat cable designed for window pass-through to avoid damaging the seal.
- External socket: Install a waterproof socket (Anderson plug, SAE connector, or MC4 bulkhead connector) on the outside of the van. Cable inside connects directly to the charge controller. This is the best permanent solution.
Using a Panel with Built-In Controller
Some portable panels include a built-in PWM or basic MPPT charge controller with alligator clips for direct battery connection. This is simple but less efficient than a standalone MPPT controller.
- Convenient for quick deployments
- No separate controller needed
- Typically PWM (less efficient than MPPT)
- Limited monitoring — no app or data logging
Never connect a panel directly to a battery without a controller
Connecting a solar panel directly to a battery without a charge controller risks overcharging, which can damage lithium batteries, cause thermal runaway, or boil the electrolyte in lead-acid batteries. Even a small 50W panel can overcharge a battery if left connected in full sun. Always use a charge controller.
USB-Only Panels
For charging phones, tablets, and USB devices only. These panels have built-in USB regulators and cannot charge a 12V battery system. They are fine for hiking or as an emergency phone charger but are not a replacement for a proper solar system.
Sizing a Portable Panel
For a portable panel to be genuinely useful as a primary or supplementary solar source, consider these guidelines:
- Phone and tablet charging only: 20–50W is sufficient
- Supplementing a roof system in winter: 100–200W
- Primary solar for a small van: 200W minimum (one foldable panel at a time)
- Primary solar for a medium van with fridge: 200–400W (but deploying 400W of portable panels daily becomes tiresome)
The practical limit for a portable panel that one person can comfortably carry and set up is about 200W. Beyond that, you are carrying and deploying multiple panels, which quickly becomes impractical for daily use.
Storage Solutions
Portable panels take up interior space, which is precious in a campervan. Plan your storage carefully:
- Under the bed or bench seat: Suitcase panels slide under most raised beds
- Behind the driver or passenger seat: Foldable panels fit in the gap behind seats
- In a rear door pocket or pouch: Custom fabric pouches on the rear doors work well for thinner foldable panels
- On the roof rack: Store the panel on a roof rack when not deployed (secured with straps). This frees interior space but exposes the panel to weather and theft
Protect the panel surface during storage
Foldable panels with exposed cell surfaces can be scratched by tools, shoes, and other gear stored nearby. Keep the panel in its carry bag or place a piece of cardboard over the cells. Scratches on the surface reduce light transmission and output.
Security Considerations
Portable panels left unattended outside the van are a theft target. A 200W foldable panel costs £150–£250 and is easy to pick up and walk away with.
Theft Prevention
- Cable lock: Loop a cable lock through the panel frame and around a wheel or tow hook
- Stay visible: Deploy panels where you can see them from inside the van
- Use a less conspicuous colour: Black-framed panels are less eye-catching than silver
- Consider insurance: Some van insurance policies cover portable solar equipment; check your policy
Weather Awareness
Portable panels left outside in a sudden storm can be damaged by wind or hail. High winds can also send an unsecured panel flying, potentially damaging your van or others' vehicles. Always secure the panel with ground stakes or weights, and retrieve it if strong winds are forecast.
Recommended Portable Panels for UK Campervans
| Panel | Type | Wattage | Weight | UK Price | Notes |
|---|---|---|---|---|---|
| Renogy 200W Foldable | Foldable | 200W | 7.5 kg | £200–£260 | Popular, good value |
| Jackery SolarSaga 100W | Foldable | 100W | 4.7 kg | £230–£280 | Premium feel, USB+DC |
| EcoFlow 160W | Foldable | 160W | 7.0 kg | £280–£350 | High efficiency |
| Renogy 200W Suitcase | Suitcase | 200W | 12.5 kg | £220–£280 | Durable, with controller |
| BougeRV 200W | Foldable | 200W | 6.9 kg | £180–£240 | Lightweight option |
Combining Portable and Roof-Mounted
The ideal setup for many UK vanlifers is a combination of fixed and portable panels. A 200–400W fixed system handles day-to-day needs passively, while a 100–200W portable panel supplements when parked in shade or during winter.
Wiring a Portable Panel Into an Existing System
If your charge controller has spare capacity, you can wire a portable panel in parallel with your roof panels. Install an external Anderson plug or MC4 bulkhead connector that feeds into the same charge controller input.
Check that the total panel wattage does not exceed your charge controller's rating. Use our calculator to verify your charge controller can handle the combined roof and portable panel wattage.
If your controller is already at capacity, you will need a second charge controller dedicated to the portable panel. A small 15–20A MPPT controller is usually sufficient.
Check your charge controller capacity
Our free calculator sizes your charge controller based on total panel wattage. Make sure your controller can handle both roof and portable panels combined.
Frequently Asked Questions
Are portable panels worth it for UK campervan use?
Yes, particularly as a supplement to a fixed system. The ability to angle towards the low UK sun and move out of shade provides a meaningful output boost. As a sole power source, they are viable for weekend and summer use but impractical for full-time living due to the daily setup routine.
Can I leave a portable panel deployed on the roof when driving?
No. Portable panels are not secured for driving speeds and will be ripped off by the wind. The panel could damage other vehicles. Always stow portable panels inside the van before moving.
How do I connect a portable panel if I do not want to drill any holes?
Use a flat MC4 or Anderson cable that passes through a closed window seal. These are available for under £10 and are designed to be thin enough that the window still closes securely. Alternatively, install a waterproof bulkhead connector in the van wall below the window line.
What is the best angle for a portable panel in the UK?
In summer, around 30 degrees from horizontal. In winter, 50–60 degrees (nearly upright). Point the panel due south. As a rough rule, set the angle equal to your latitude minus 10 degrees in summer, and your latitude plus 10 degrees in winter. The UK is at roughly 51–56 degrees latitude.
Do portable panels work on cloudy days?
Yes, but with significantly reduced output — typically 10–25% of their rated power under heavy overcast. On a bright cloudy day with thin cloud, output can still reach 40–60% of rated power. The advantage of a portable panel is that you can angle it optimally even under cloud to get the most from the available diffuse light.
Can I use a portable panel with a power station instead of a van battery?
Yes. Many portable panels are sold as companions to portable power stations (Jackery, EcoFlow, Bluetti). However, a dedicated campervan battery system with a proper MPPT controller will charge more efficiently than most power station built-in controllers. If you already have a van electrical system, connect the portable panel to that rather than using a separate power station.