Solar Payback Calculator

Estimate years to payback for solar install given production and incentives.

Gross system cost

Incentives / rebates

Annual production (kWh)

Electricity rate ($/kWh)

Annual degradation (%)

Net cost after incentives

$15,400

Simple payback (years)

10.1

Year 1 value

$1,520

Net over ~25 years (degraded)

$20,405

Rough. Real payback varies with actual production, rate changes, maintenance, and export credits.