Six proven routes to lower bills — each with a tool that shows your numbers before anyone asks for your details. Start where your home leaks most.
Find where heat escapes — roof, walls, floor, draughts.
Heat Loss Tool →Whole-house costs and the funded routes.
Insulation Calculator →Solar savings, payback and system size.
Solar Calculator →Battery sizing and retrofit to existing solar.
Battery Calculator →Heat pump running costs vs your gas bill.
Heat Pump Calculator →ECO4, WH:LG, BUS and 0% VAT — mapped to your household.
Grant Checker →Fabric first (loft → walls → floor), then generation (solar), then storage, then heating. Insulating before a heat pump shrinks the system you need; solar before a battery gives the battery something to store. Our which-first engine sequences your exact home.
The Home Energy Funding & Savings Checker asks six questions and builds your plan — priorities scored, funding routes flagged, one matched installer if you want quotes. Build my Home Energy Plan →
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.
For most UK homes: loft insulation first (1–3yr payback), then wall insulation, then solar — fabric beats gadgets.
Yes — ECO4 (to Dec 2026), Warm Homes: Local Grant (to Mar 2028), £7,500 BUS and 0% VAT. The checker maps your routes in 60 seconds.
No — most homes need two or three. The tools show which ones pay back for your property.
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.
Check My Home →