Solar Panel Payback Calculator
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How do I calculate solar panel payback?
Solar payback formula: Total System Cost ÷ Annual Savings = Payback Period. Example: £6,750 ÷ £580/year = 11.6 years. After payback, you receive 15+ years of free electricity. UK payback ranges from 7 years (optimal setup + smart tariff) to 14 years (suboptimal direction or small system). Use our calculator for a personalised estimate based on your postcode and roof.
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