As of 2026, the average cost of residential solar panels in the U. is between $15,000 and $25,000 before incentives. This typically translates to about $2. 50 per watt of installed capacity (more on price per watt below). . The cost of a 1500W solar photovoltaic system varies significantly based on various factors, including location, installation, equipment quality, and available incentives. The total price depends on your system size, location, roof type. . A 15 kW solar panel system is enough to power the average home—but it'll cost you about $36,300. 75 per square foot before accounting for the federal tax credit.
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