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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.
So for this system you would need seven 75-watt solar panels and four 300-amp hour batteries. If you were using 200-watt panels, you would need only three panels and four 300-amp batteries. Tomorrow we will discuss more on the components you will need to build a simple off grid system.