If you're wondering how many watts of solar panel you need to power your RV, there are a few things you'll need to take into account. First, you'll need to know the power requirements of all the devices and appliances you plan to run off of solar. This includes things like your RV's lights, fridge, water pump, and any other electronics. Once you have that information, you can calculate the number of watts of solar panel you'll need by doing some simple math.
For example, let's say you have a fridge that uses 500 watts of power and you want to run it for 8 hours a day. That means you'll need 4,000 watt-hours of power each day to keep your fridge running. If you have a 100 watt solar panel, that panel can produce 800 watt-hours of power in a day (since most solar panels have an average efficiency of around 80%). That means you'll need 5 solar panels to power your fridge for