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When you measure up the space you have available on your roof or elsewhere, you may find it difficult to capture the power required to run your RVâs house systems completely off of solar power. For a large motorhome, you might need 500 to 800 watts of power.
Batteries can only be recharged a finite number of times, the more you take, the less times you can recharge them. SO, if you use 100 watt hours from dawn to dawn and you have 220 watt hours of solar input, it will take .46 hours to put that back into the batteries from that 55 watt module. Basically.ne of our readers shared this very detailed breakdown of the Solar RV Setup for their Safari Trek. The information goes in depth (and I mean in depth) on the science behind solar in different lattitudes, months, usage numbers for appliances, battery capacity, and so on.