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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.
Best Answer: It depends on what you plan to operate in the camper trailer. If you need lights and maybe a television and radio, a 500 watt generator would likely be adequate. However if you hope to use it for cooking you will need at least 2000 watts. Air conditioner would be more.