UK Energy Calculators
Real calculations on real property data.
Four tools, each fed by the live MHCLG energy performance register. Tell them your postcode and they pull your actual EPC band — then size the kit you're considering against your real home, not a generic average.
Solar panel sizing
→Roof orientation, area, and postcode → recommended kWp, expected annual generation, Smart Export Guarantee income estimate, payback period.
Heat pump sizing
→Property age, floor area, and EPC band → recommended kW capacity, installed cost range, Boiler Upgrade Scheme grant offset, net cost after grant.
Battery storage sizing
→Daily kWh use, current tariff (Octopus Agile / Cosy / Tracker / fixed) → recommended battery kWh, expected annual arbitrage savings, payback period.
Grant eligibility wizard
→Postcode + EPC band + property type + Council Tax band → every UK energy grant you might qualify for (BUS, Warm Homes Plan, GBIS, regional schemes), with indicative funding values.
Why these calculators are different
Most UK energy calculators ask for your postcode and then guess at your property. They use national averages for roof area, heat loss, and EPC band. That's why two homes on the same street get the same answer when one has 30cm of loft insulation and the other has none.
These calculators pull your actual property's energy performance certificate from the live MHCLG register. They know your real band, your real assessment date, and the address the certificate was issued against. The recommendation is calibrated to your home, not a national mean.
Where the data is thin (no EPC issued yet, or a postcode with no recent assessments), the calculator says so plainly and offers to estimate from the property details you supply instead.