On average, a 20 kW solar panel system costs $55,000, according to real-world quotes on the EnergySage Marketplace from the first half of 2024.
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Per-unit pricing guidance shows costs for key components: a 20 ft shell with basic insulation around $2,000–$4,000; 40 ft shell with enhanced insulation around $3,500–$7,000; climate control typically $2,000–$12,000 depending on SEER rating and redundancy.
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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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Welding costs $50 to $125 per hour on average, covering the hourly wage, equipment, etc. Welding prices for smaller projects include a minimum fee of 1 to 2 labor hours.
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