How much does a solar photovoltaic panel cost per kilowatt hour?
WHAT IS THE AVERAGE COST OF SOLAR PANELS PER KILOWATT HOUR? The average expense of solar panels per kilowatt hour varies, typically landing between $0.50
Cost per kWh shows the lifetime cost of solar electricity by dividing your net system cost by total expected energy production over 25 years. This typically ranges from 6-8 cents per kWh, compared to current grid electricity averaging 16.44 cents per kWh nationally.
By comparison, new-build natural gas peaker plants cost $0.138 to $0.262 per kWh, even before factoring in volatile fuel prices. With current federal subsidies still in place, solar can be as low as $0.02 per kWh and wind $0.015 per kWh, making them much cheaper than even the most efficient existing power plants relying on dirty energy.
Another measure of the relative cost of solar energy is its price per kilowatt-hour (kWh). Whereas the price per watt considers the solar system's size, the price per kWh shows the price of the solar system per unit of energy it produces over a given period of time. Net cost of the system / lifetime output = cost per kilowatt hour
As of 2025, the average cost of residential solar panels in the U.S. is between $15,000 and $25,000 before incentives. This typically translates to about $2.50 to $3.50 per watt of installed capacity (more on price per watt below). The total price depends on your system size, location, roof type, and installer.
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