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What Solar System Size Do You Need?


Important Note: This equation calculates the total kW of a solar system necessary to offset an entire electricity bill. Dividing the 6200 watt system by the number of 250 W solar panels will yield the number of solar panels necessary to offset your entire electricity bill (~25 solar panels).  However, your roof may not hold 25 panels, so the next step is to figure out how many panels will actually fit on your roof.




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