Solar Panels for Campers: How to Choose the Right Setup
For a weekend away with a 12V fridge running, 200W to 400W of solar paired with a 1kWh to 2kWh battery is enough for many Australian campers, while phones and lights alone may need only 150W to 220W. Extended touring usually calls for 400W to 600W, and remote travel with heavier loads 600W or more, with at least 2kWh of storage. The right setup depends on what you run each day, where you camp and how much sun the panels get.
Key Takeaways
Size it for your trip: 200–400W of solar and a 1–2kWh battery may cover a weekend with a fridge running. Longer travel often needs 400–600W, remote trips 600W or more, plus over 2kWh of storage.
Choose panels for your setup: Roof panels are set and forget; portable panels can sit in the sun while your camper is parked in the shade.
Calculate daily use: Factor your fridge and other 12V loads in before sizing your panels and battery.
Allow for conditions: Sun hours depend on where and when you travel; shade, heat and panel angle then take their cut.
Match components: Pick a controller and battery that work together, size the cables and fuses to suit and get an inverter that handles your load.
What Types of Solar Panels Can You Use for a Camper?
There are two basic ways to go: panels fixed to the roof, or panels you set up at camp each time. Rigid and flexible panels are usually roof-mounted, while folding panels and solar blankets can be moved to catch the sun. Your choice depends on roof shape, available space, weight and how often you camp in the shade.
Solar panel type | Mounting style | Main advantage | Best suited to |
|---|---|---|---|
Rigid panels | Fixed to roof brackets or a rack | Durable and well ventilated | Caravans, hard-lid camper trailers and campervans |
Flexible panels | Bonded to the roof | Lightweight and low profile | Curved or weight-limited roofs |
Folding panels | Portable, with fold-out legs | Easy to angle towards the sun | Campsites where the camper can park in the shade |
Solar blankets | Spread on the ground or hung from an awning | Compact and easy to store | 4WD touring and setups with limited storage |
Rigid Solar Panels
Rigid monocrystalline panels are a common choice for permanent caravan installations. Aluminium frames and tempered-glass surfaces stand up to regular travel, and the mounting brackets hold the panels clear of the roof so air can move underneath. That airflow helps manage heat and can keep output more consistent on hot days. The trade-off is extra weight, along with the need for clear roof space and suitable mounting points.
Flexible Solar Panels
Flexible panels use thin polymer layers rather than a glass-and-aluminium frame. They sit flush on curved roofs and add less weight, making them a useful option for pop-top caravans and camper trailers where payload is tight. The low profile also means less wind drag. Because they sit close to the roof, there’s less airflow underneath, so heat can build up and reduce output during a long hot spell.
Portable Folding Panels
Folding panels come in hinged sections with built-in legs, so you can stand them on the ground and tilt them to face the sun. You can park the camper in the shade, set the panels up in direct sunlight and reposition them as the sun moves. They need more setup time and storage space than roof panels, but they’re worth it when you can’t park to suit the roof panels, or when trees shade the roof. When comparing camping solar panels, also account for packed size, setup time and the ability to reposition the array as shade moves.
Solar Blankets
Solar blankets have flexible cells attached to a foldable backing. They pack down small, and depending on the design you can spread one on the ground, lay it over a bonnet or hang it off the awning. Their compact size suits 4WD touring, though they need careful handling and a clear spot in the sun.
Fixed vs Portable Solar Panels for Campers: Which Is Better?
Roof-mounted panels need no daily setup and can keep charging while you drive. Portable panels let you choose their position and angle, which helps when the camper is parked in the shade. If you travel in varied conditions and have room for the extra gear, a roof-mounted panel plus a portable panel or blanket gives you both options.
How Much Solar Power Do You Need for Your RV?
Start by adding up the daily energy use of your appliances, then allow for the sunlight available along your route at the time of year you’re travelling. A closer look at solar power for caravans can help you turn that appliance list into realistic panel and battery targets.
Calculate Your Daily Power Consumption
Work out daily energy use by multiplying each device’s wattage by the hours it runs. With a fridge, base the figure on its duty cycle rather than assuming it runs continuously: the compressor cuts in and out, so it isn’t drawing power the whole time.
Appliance | Estimated daily use |
|---|---|
50–75L compressor fridge | 430–600Wh |
LED lighting | 60Wh |
Water pump | 20Wh |
Personal electronics | 80Wh |
Laptop | 195Wh |
12V fan | 32Wh |
Together, they come to about 800–1,000Wh a day, or roughly 63–78Ah at 12.8V. Start adding an induction cooktop, a coffee machine or a microwave and daily use can climb past 2,000Wh.
Choose Solar Panel Wattage Based on Your Energy Use
Solar panels rarely produce their full rated output across the whole day. Dust, panel angle, cable resistance and conversion losses can reduce the energy you collect by around 20% to 25%. Say you use 1,000Wh per day and get an average of five peak sun hours:
Effective daily generation needed = 1,000Wh ÷ 0.75 (system efficiency) = 1,333Wh
Required array size = 1,333Wh ÷ 5 peak sun hours = 267W
A 300W to 400W array gives you some extra capacity when conditions aren’t ideal.
Size Your Battery for Overnight and Cloudy Days
The panels generate power during the day; the battery supplies it after sunset and during cloudy weather. If you use 1,000Wh a day, allow 1,500Wh to 2,000Wh of usable battery capacity to cover 1.5 to 2 days. Once you’ve allowed for a safe depth of discharge, a standard 12V (12.8V) LiFePO₄ battery bank of 130Ah to 175Ah, or a 1.5kWh to 2kWh portable power station, should cover that. If you choose lead-acid (AGM), you’ll need 250Ah to 320Ah to provide the same usable energy without damaging the cells.
Allow for Shade, Weather and Seasonal Sunlight
How much sun you get depends on which part of the country you’re in and what season it is. Through winter, central and northern areas often get more sun than southern Victoria and Tasmania, where peak sun hours can fall below 2.5. Shade from trees can reduce output too. If you’re expecting cloud or travelling in winter, allow more panel capacity than a summer estimate would suggest.
How Should You Choose a Solar Setup for Your Caravan or Campervan?
Your setup depends on how long you’re away, where you camp and which appliances you need to run. Use the indicative examples below, which cover different appliance loads, as a starting point, then work out your own daily energy use before choosing a system. Daily energy use and battery capacity will vary with appliance efficiency, operating hours, weather and the amount of usable sunlight available.
Camping Style & Scenario | Daily Equipment Powered | Estimated Daily Energy Use | Solar Input Needed | Approximate Battery Capacity |
Weekend Getaway (1–3 days, mild weather) | Phones, head torches, LED camp lights, occasional laptop top-up | 200–500Wh | 150W–220W portable or rooftop | 0.5–1kWh |
Extended Touring (1–3 weeks, mixed off-grid) | 65L 12V fridge, LED lighting, water pump, ventilation fans, laptops, small blenders | 1,000–2,000Wh | 400W–600W array | 1.5–3kWh |
Remote 4WD Bush Camping (Self-sufficient, deep outback) | Dual-zone fridge/freezer, induction cooker, power tools, Starlink, communications | 2,000–4,000Wh or more | 600W–800W+ combined array | 3–5kWh or more |
Solar Setups for Short Camping Trips
For a weekend away or a short coastal break where you’re mainly powering phones, camp lights and a laptop, a portable power station with solar is a plug-and-play option that leaves your vehicle’s factory wiring alone. The EcoFlow DELTA 3 Plus Solar Generator (PV220W) bundle pairs a 1024Wh battery with a 220W bifacial portable panel. Since LED lighting (around 60Wh a day) and personal electronics (around 80Wh) only use a fraction of that capacity, there’s plenty left in the tank to charge a laptop, depending on what else you run. The panel tops the battery back up whenever the sun’s out, and the whole setup shifts between the car and the campsite without much fuss.
Solar Setups for Extended Off-Grid Trips
For a longer stay at an unpowered national park campsite, you need to balance ongoing power use, the size of your battery and how quickly the panels can recharge it during the day. If you’re running a 12V compressor fridge around the clock on top of lighting, the rangehood and everyday electronics, you’ll want plenty of storage and room to expand. The EcoFlow DELTA 3 Max Plus + 400W Solar Panel package combines a 2048Wh base battery, a robust 3000W AC inverter and a 400W high-efficiency solar panel. That 400W is the panel’s peak rating, not what you’ll get all day, so check its likely daily output against what you use. Extra batteries take the capacity up to 10kWh, which gives you more in reserve for a run of overcast days or heavy use, though how long it lasts depends on how many you add and what you run.
Solar Setups for 4WD Touring in Remote Areas
Whether you’re travelling the Gibb River Road or touring Cape York, corrugations, bulldust and constant vibration are hard on anything bolted to the roof. Remote outback touring calls for tough, vibration-resistant mounting hardware and a second way to charge. Pairing a heavy-duty panel on the roof rack with an auxiliary solar blanket gives you a fallback if the roof panels are coated in red dust or shaded by recovery gear. Adding a DC-DC multi-stage charger lets your vehicle’s alternator charge the auxiliary battery as you drive between campsites, even on overcast days.
What Components Do You Need for a Complete RV Solar System?
A typical camper solar system includes panels, a charge controller, a battery and suitable wiring. You’ll only need an inverter if you want to run 230V appliances.
Match the Panels and Battery
AGM batteries are relatively affordable but heavy, and typically offer about 50% usable capacity. LiFePO₄ batteries are lighter, can usually be discharged further and support many charge cycles. Whichever way you go, check that the panel voltage and controller settings suit your battery.
Choose a Charge Controller
A charge controller regulates the power going from the panels to the battery. PWM models are basic and budget-friendly; MPPT models are generally more efficient, especially in variable light. Check that the controller’s maximum voltage rating exceeds the array’s expected cold-weather open-circuit voltage.
Size the Inverter for Your Appliances
A pure sine wave inverter converts 12V or 24V DC battery power to 230V AC. Choose one with enough continuous output for your appliances and extra surge capacity for equipment such as compressor motors.
Use Suitable Wiring and Connectors
Choose the cable size to suit the system’s current and the length of the cable run, and use suitable connectors, fuses and isolation switches. Fixed installations should be carried out safely and in line with the relevant Australian electrical requirements.
Conclusion
Choose a solar setup based on your daily power use, how long you’re away and the weather you expect. A modest array may suit a short weekend trip, while higher fridge loads or remote travel may call for more solar and battery capacity. Before you travel, double-check that your panels, controller, battery, wiring and inverter are all properly matched.
FAQs
Can You Add More Solar Panels to an Existing RV System?
Usually, yes. The catch is your charge controller and wiring, which both need headroom for the extra current. When expanding, make sure the new panels’ voltage and current ratings match your existing ones, and confirm that your MPPT regulator’s maximum input voltage and current limits will not be exceeded.
Is Driving with Solar Panels Safe and Roadworthy?
Rooftop panels are generally fine on the road as long as they’re secured with rated brackets, mechanical fasteners and vehicle-grade structural adhesives. Staying roadworthy comes down to how they’re mounted, so check the hardware, the bracket joints and the cable conduits before each trip and sort out anything that’s worked loose.
What's Better, 12V or 24V Solar Panels?
Higher operating voltages are generally better when paired with an MPPT charge controller. Whether you run a 24V panel or wire two 12V panels in series, the higher array voltage reduces current in the cables, cuts resistive losses and helps the MPPT wake up earlier in low light. With a basic PWM controller, though, the panel’s nominal voltage has to match your battery bank’s voltage (e.g. a 12V panel for a 12V battery). Always check that your array’s cold-weather open-circuit voltage (Voc) stays within your MPPT’s maximum limit.
What Size Solar Panel Is Needed to Power a 12V Camping Fridge?
A 150W to 200W solar panel paired with a 100Ah lithium battery can usually keep a standard 50L to 65L 12V compressor fridge running in summer, though it depends on the fridge, the weather and how much sun you get where you’re camped. If you’re travelling through the tropical north or facing a run of 35°C+ days, stepping up to a 250W–300W array gives you a solid buffer.