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Solar Panel Payback Calculator

Estimate solar savings, payback, and 25-year net benefit.

Inputs

Inputs and assumptions

System size

Cost per watt

Federal credit rate you qualify for.

Annual production per kW

Output lost each year; 0.5% is typical.

Rate

Annual rate increase

Set 0 to model a cash purchase.

Loan term

Inverter replacement (~yr 12)

Result

Loan payment (if financed)
Waiting for calculation.
25-year net benefit
Waiting for calculation.
Net cost after credit
Waiting for calculation.
Simple payback
Waiting for calculation.
First-year savings
Waiting for calculation.
This calculator is a first-pass screening tool. Verify your utility tariff, metered usage, equipment specifications, and installer quotes before making a decision.

Workspace

Keep the assumptions with the result.

Save this calculation to return to the inputs, result, and report from your private workspace.

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