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The U.S. Department of Energy estimates that installing a small, single solar panel system that includes a built-in inverter and generates about 75 watts costs approximately $900. However, a single panel will not produce sufficient energy for a single-family home. A multi-panel system generating 5 kilowatts (enough to power most homes) would cost approximately $30,000 to $40,000. There are many federal and state tax credits available to help offset the costs.
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