Is it really cheaper to go solar?

According to the Energy Information Administration, the average home uses about 893 kilowatt-hours (kWh) per month. A residential solar installation produces between 350 and 850 kWh per month. While it's cheaper to build renewable energy when considering a new plant, that metric doesn't necessarily apply to managing an existing fossil fuel plant, explains Ashley Langer, an energy economist at the University of Arizona.

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