(before Tax Credit)
(After Tax Credit)
20 years estimated savings.
According to the U.S. Energy Information Administration (EIA), the average American household uses 10,715 kWh of electricity per year¹, which means a home would need a 7kW system to offset 100% of electricity. As you can see from the table below, a 7kW system includign installation will cost you around $20K before applying any incentives.
Now you must be thinking how many solar panels do I need for this 7kW system. This depends on a few key factors, including geographic location, panel efficienty & power, and of course the amount of energy your household uses. An average home would need between 20 and 24 solar panels to fully offset electricity bills with solar. This is assuming you get 340 W solar panels.
Can your roof fit around 20 solar panels? An average house in the US is 2,687 square feet² and such a house can fit around 35 solar panels.
Table below will give you an idea of how many solar panels you need for common electrical appliances³. Electric vehicles consume a lot of electricity so plan accordingly if you are thinking of buying one in future.