Size your RV's solar generator with real numbers, not a sales pitch.
Search for "what size solar generator do I need for my RV" and you'll mostly find blog posts written by the companies selling the generators. This tool doesn't sell anything — enter your own appliances and energy use, and get a sizing estimate you can take to any brand.
1. Generator / inverter power sizing
Enter the running watts for whichever appliances you'll actually run off the generator. Leave anything you won't use at 0. Running watts are usually printed on the appliance's label or spec sheet — if not, see our running vs. surge watts guide.
2. Battery capacity & solar panel sizing
Estimate your daily energy use in watt-hours (Wh) — roughly, each appliance's running watts multiplied by how many hours per day you run it, summed up. See our battery capacity guide for a worked example.
How this works
This calculator applies the same sizing method described in our guides — nothing hidden, nothing tied to a specific brand. Start here if you want the full methodology, or jump to a specific question:
The full sizing methodology this calculator is built on, step by step.
Why your AC's startup draw matters more than its running draw for sizing.
How to estimate daily watt-hour use and size your battery bank around it.
Why the same battery size needs different panel wattage depending on where you park.