How to Choose the Right Solar Generator Size for Your Power
Learn how to calculate your daily power needs and choose the right solar generator size for camping, emergencies, or off-grid living. Simple tips, examples, and a free
Solar Panel Size: 5,000 Wh ÷ 350 ≈ 14–15 × 100W panels → Or 6 × 200W panels (≈ 1,200W array) Recommended Setup: This setup supports heavier loads and short-term AC use, but highlights how full-time solar living requires a much larger system than occasional weekend trips.
By matching your electricity use (in watt-hours) to your solar panels and batteries, you can camp off-grid confidently — no hookups, no stress. This RV solar sizing guide walks you through every step — from estimating your daily energy needs to choosing the right panels, batteries, and charge controller.
Use this solar calculator to size your campervan or RV camper solar setup. If your device doesn't specify watts, use the watt calculator to convert amps and volts. List each device - every electrical component - its usage in watts, maximum number of hours used each day & if it's an AC or DC model.
Choose the size closest to your solar panel set up. Each has a complete list of the components needed. Choose your solar panels. There's a number of different types and you can read more about them in our camper solar panels post. Once you've selected the type of panel, measure the available space on the roof so you know what sizes to buy.
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