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Solar Payback Calculator
Estimate simple solar-system payback from upfront cost and annual electricity savings.
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Formula
Simple payback period = system cost ÷ annual savings.
Simple payback period = system cost ÷ annual savings.
How it works
1
Enter system cost.
2
Enter annual savings.
3
Review payback period in years.
Important notes
This simple model ignores financing, degradation, maintenance, incentives and changing electricity rates.