Solar payback calculator

Payback period is the year in which your cumulative electricity savings equal the net cost of the system (after incentives). Typical residential payback runs anywhere from 6 to 15 years depending on your electricity rate, sun and price per watt.

What moves payback

• Electricity rate — higher rates mean faster payback.
• Price per watt — a lower install price shortens it directly.
• Incentives — the loss of the 30% federal credit for 2026+ installs adds years for many homeowners.
• Rate inflation — utility rates historically rise, which improves later-year savings.

After payback, the remaining system life is close to free electricity. Use the Payback Calculator for your numbers, then compare against staying on the grid.