In 2025, the average cost of solar panels in the USA ranges from $2. Combined with the tax credit, homeowners can achieve payback periods of just 6-10 years. Significant Regional Variations: Solar costs vary. Average U. solar cost per square foot in 2025: $6 – $12 after the 30% federal tax credit. The most accurate pricing metric is still cost per watt, but per-sq-ft estimates are helpful for ballpark figures. Most homeowners spend between $12,600 and $33,376 to install a complete residential solar system in 2026, with the national average at $19,873 before incentives. What is the Average Solar Panel Installation Cost in 2025? What About Tesla Solar Panel Installation Cost? Is Investing in Solar Panels Worth It in 2025? At RenewGenius, we believe in. NLR analyzes the total costs associated with installing photovoltaic (PV) systems for residential rooftop, commercial rooftop, and utility-scale ground-mount systems. NLR's PV cost benchmarking work uses a bottom-up.