greenhomesums
Solar calculators for UK homes
Work out whether solar stacks up on your roof, how fast it pays back, and what batteries and export tariffs do to the numbers.
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Are solar panels worth it in the UK? Calculator + honest verdict
For most UK homes solar panels pay back in 7-11 years and save £15,000+ over 25 years. Enter your postcode for a personalised estimate. Powered by PVGIS satellite data.
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Solar Panel Payback Calculator UK — By Postcode
Solar panel payback calculator by UK postcode. Enter your postcode to see payback period, 25-year savings and annual generation for your region. Powered by PVGIS.
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Solar battery storage UK — cost, savings & payback calculator
Solar battery storage UK: typical cost £3,000–£6,000 added to solar. Calculate combined savings from solar panels, home battery and EV charging. 15-year net benefit with live Ofgem rates.
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Solar Export Tariff Comparator UK
Compare UK Smart Export Guarantee (SEG) tariffs side-by-side. Enter your annual solar export and see exactly what each supplier — Octopus, E.ON, British Gas, EDF, OVO, Good Energy and more — will pay you per year.
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Home battery storage UK without solar — cost, payback & is it worth it?
Home battery storage UK without solar: costs £2,800–£5,500, pays back in 7–10 years on Octopus Flux. Personalised payback calculator. If you have solar, see the solar battery storage calculator.
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Octopus Cosy vs Flux Tariff Comparator UK
Side-by-side comparison of Octopus Cosy (heat-pump-tuned), Flux (battery-tuned) and the standard variable. Annual £, peak-window share, export income.