The Lawrence Berkeley National Laboratory conducted research on single-family homes with and without solar panels to determine if there is any value difference amongst them. The study was executed within six markets: California, Florida, Maryland, North Carolina, Oregon, and Pennsylvania.

Using the paired-sales valuation technique, seven appraisers evaluated 43 homes throughout the states. This method compares recent sales of comparable homes to assess the premium buyers are willing to pay for a home with mounted solar panels.

As a result, researchers found that buyers are more inclined to pay an additional $15,000 for a home with a solar power system that includes an average of 3.6 kilowatts or four dollars per watt. These characteristics vary in each market and are likely smaller given the currently falling solar prices.

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