SOLAR GEAR / GETTING STARTED

RV solar basics: panels, batteries, and portable power stations

Power Out There · September 28, 2026

A solar panel produces electricity when light reaches it. A battery stores energy for later. An inverter converts battery power to AC for compatible appliances. Keeping those jobs separate makes a solar setup easier to understand—and easier to size.

Start with your daily energy use

Watts (W) measure power at a moment in time. Watt-hours (Wh) measure energy used over time. A device drawing a steady 50 W for four hours uses 200 Wh. A 1,000 W appliance used for six minutes uses 100 Wh. Short use of a powerful appliance can consume less energy than a small device left on all day.

Make a daily list using your devices’ measurements or documentation. For equipment that cycles on and off, such as a refrigerator, use measured daily energy or manufacturer consumption data rather than assuming its compressor runs continuously.

Battery capacity and output are different limits

A portable power station combines a battery with charging electronics and outputs. Check both its stored energy in Wh and its output limit in W. Enough battery capacity does not automatically mean it can start or run a demanding appliance.

As a simple example, 1,000 Wh divided by a steady 100 W load gives ten hours before accounting for losses. Real runtime will be shorter because some energy powers the electronics or is lost during conversion, and the full nominal battery capacity may not be available. Treat that calculation as an upper-bound illustration, not a runtime promise.

Solar replenishes the battery; it doesn’t guarantee a full one

Panel wattage is a rated power figure, not daily energy production. Sunlight, shading, orientation, temperature, and charging limits affect what reaches the battery. The Department of Energy explains why solar production varies and why storage is useful when production and demand occur at different times.

For a purely illustrative calculation, a 200 W panel operating at its rated output for four equivalent full-output hours would produce 800 Wh before losses. This is not a forecast for your campsite. Plan around local conditions and leave room for cloudy days or another charging source.

Check compatibility before connecting panels

A connector that fits does not prove electrical compatibility. Compare the panel arrangement with the power station or charge controller’s permitted voltage and current limits, connector requirements, and polarity. Open-circuit voltage can increase in cold weather; the temperature-adjusted value must stay within the equipment’s limit. Victron’s installation guidance specifically calls for considering open-circuit voltage and temperature coefficients when arranging panels in series.

For an integrated power station, follow its manual’s approved panel configurations. For a permanent RV installation, have a qualified installer specify wiring, protection, mounting, and battery compatibility.

Choose the setup around your camping routine

Portable panels can be positioned separately from the RV but need setup and storage. Roof-mounted panels stay with the vehicle, while their exposure depends on where you park. Before comparing products, decide what must run, for how long, how you will recharge, and how much equipment you can carry.

Sources

Editorial note: This is a planning guide, not a hands-on product test. Energy calculations are illustrative, not measured product results.