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This is the simple calculator from the Economics of Solar Blog.
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Please feel free to make a copy and modify the GREEN cells to get a personalised calculation. We recommend using a desktop browser or the Google Sheets mobile app for the best experience.
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Usage (kWh)4000
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Self-consumption50%
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Reduction in grid use (kWh)2000
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Exported to grid (kWh)2000
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Grid import price£0.27
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Grid export price£0.15
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First Year Savings£840.60
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Power price inflation2%
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Length of installation (Years)7
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Degradation rate1%
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Total savings£6,064
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