Assumes $900 to install one 325 W panel — hardware, mounting, microinverter, electrical work, labour and permitting — repaid only by the electricity it avoids buying. No subsidies, tax credits, net-metering premium, financing cost or future price rises are counted, and the figure is undiscounted. Electricity price is the no state figure published for this area, so the US average is used (EIA, May 2026). A single panel is unusually expensive per watt because it carries a whole array's fixed costs, which is why these numbers look worse than rooftop solar generally does.
| Buildings with roofs | 1,909,320 |
| × Panel rating | 325 W |
| × Annual yield per panel here | 507.9 kWh |
| Annual generation | 969,707,293 kWh |