UK green-home calculators
Honest payback, running-cost and grant calculators for UK homeowners thinking about solar, heat pumps and EVs.
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Solar Panel Savings Calculator UK
Estimate your solar panel payback, 25-year savings and export income by UK postcode. Uses JRC PVGIS satellite data.
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Solar Payback by Postcode UK
UK regional solar calculator — see solar panel payback, 25-year savings and annual generation for your postcode. Powered by JRC PVGIS satellite data.
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Heat Pump vs Gas Boiler Calculator UK
Compare the running cost, 15-year total cost of ownership, and CO₂ impact of an air-source heat pump versus keeping a gas boiler. Uses the current Ofgem price cap and the UK Boiler Upgrade Scheme grant.
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Boiler Upgrade Scheme Grant Calculator UK
Check if you qualify for the UK Boiler Upgrade Scheme £7,500 grant for a heat pump — or £5,000 for a biomass boiler — and see your net install cost. Updated for 2026 rules.
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EV Home Charging Cost Calculator UK
Work out the real cost of charging your electric car at home vs public chargers, across UK time-of-use tariffs (Octopus Go, Intelligent Octopus, OVO Drive Anytime, E.ON Next Drive), and compare with petrol at today's prices.