Local solar economics vary
Net metering, export tariffs, incentives, roof orientation, shading, degradation, maintenance and financing can materially change payback.
Example
A system that costs 18,000 and produces 9,000 kWh in the first year at 0.18 per kWh offsets about 1,620 in year-one electricity cost before incentives, financing and maintenance.
How to use the result
Use the estimate to compare scenarios: higher electricity rates, lower production, different system costs or a longer ownership period. Payback can change sharply when export rates differ from retail rates.
Limitations
This is not a solar design, tax or investment recommendation. It does not model time-of-use pricing, batteries, roof replacement, inverter replacement, tax credits or local interconnection rules.
Last reviewed: 2026-05-17