Maryland / Rockville

Is solar worth it in Rockville?

Potomac Electric Power Co averages 20.1¢/kWh. With 4.4 peak sun hours a day, a typical 8.0 kW system makes ~10,384 kWh a year and saves about $2,085 in year one.

9.3years to pay off
Electric rate20.1¢per kWh
Peak sun4.4hrs/day
System8.0 kW≈$22,000
25-yr net$54,001after cost

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