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Solar Payback Period Calculator

Calculate how long it takes a residential solar system to pay back its installation cost from electricity savings. Accounts for tax credits, utility rates, and annual rate increases.

Inputs

US average ~$3.00 before tax credit.
30% through 2032.
Sunny South: 1500+. Northeast: 1100. Solar-resource maps available from NREL.
Payback period
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Net installed cost
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First-year savings
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Annual production
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25-year total savings
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Net profit over 25 years
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About Solar Payback Period Calculator

Typical payback

US average: 7-12 years depending on state and utility rates. Sunny states with high electricity prices (California, Hawaii) hit payback faster. Cloudy states with cheap utility power take longer.

Federal tax credit

30% of installation cost through 2032, then 26% in 2033, 22% in 2034. Reduces total tax owed dollar-for-dollar. Requires sufficient tax liability to claim — unused credits roll forward.

What this excludes

Battery storage costs, panel replacement (rarely needed within warranty), inverter replacement (~10-15 years), property value increase (typically 3-4% home value boost), and home insurance changes. Treat the figure as conservative.