Every tool on the platform — free, no sign-up, results before any contact details. Built on EST-anchored data with methodology published.
Generation, savings and export for your roof.
Calculate →Years to break even, honestly modelled.
Calculate →Match storage to your evening usage.
Size it →Add storage to existing solar.
Check →Your gas bill vs a heat pump, side by side.
Compare →AC-coupled (battery has its own inverter) is the retrofit default: no rewiring of your array, works with any brand or age of system, £3,500–£6,000 installed for 5–10kWh usable. DC-coupled only makes sense if your inverter is due replacement anyway — a hybrid inverter + battery swap can be cheaper combined.
Feed-in Tariff payments are unaffected by adding storage — generation payments continue and deemed export isn’t metered down. On SEG, a battery lets you shift export into peak-price windows instead.
Match usable capacity to your evening consumption and summer surplus — the sizing guide has the tables. Most 4kWp homes land at 5–8kWh usable.
Yes — every tool is free, no sign-up, and shows results before any contact capture.
Indicative ranges anchored to Energy Saving Trust benchmarks (May 2026) with stated assumptions — surveys give exact figures.
The Home Energy Checker if unsure; the Heat Loss Calculator if your home feels cold; the cost calculators once you know your measure.
Facts checked 21 August 2026. We link to official sources and show when facts were last verified. If a scheme changes, we update the page.
Free, independent, 60 seconds. We compare every option, check Government scheme eligibility and match you with one trusted local installer if you want one.
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