You'll pay an average of $38,336 to install a 13. Solar panels typically last 25-30 years, generating free electricity and protecting you from rising utility rates for decades.
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About 97% of solar panels quoted on the EnergySage Marketplace in the second half of 2025 are 400 to 460 watts—expect to see panel outputs in this range in your quotes. Your panels' actual output will depend on your roof's shading, orientation, and hours of sun exposure.
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The highest wattage residential solar panels currently available reach 670 watts for commercial-sized residential applications, with standard residential formats typically maxing out at around 550 watts. The LONGi Hi-MO X10 series leads the market with up to 670W output.
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Depending on its location, tilt angle, and the direction it's facing, a 2kW solar system can generate as much as 15 kWh of energy in a single day in the summer or as little as 4 kWh in the winter.
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