Official DESNZ delivery data, tracked release-by-release. Current edition: August 2026 (published 27 Aug). Next release: Thursday 26 November 2026 — this page updates the same day.
5,470 households upgraded · 11,250 measures installed to end-July 2026 (July release: ~5,100 / 10,460 — a +370 household, +790 measure month). Measure mix: Solar PV 38% · insulation 24% · batteries 18% (up from 17%). TrustMark holds ~14,700 lodged measures across ~6,700 households, so validated totals are likely to revise upward under DESNZ’s new methodology of back-filling incomplete Grant Recipient records from TrustMark data.
South East: 23% of upgraded homes · North West: 19% — and the deepest retrofits at 2.33 measures per household · East of England: 14%. Delivery runs through 74 projects covering 271 local authorities (97%+ of eligible England); councils allocate annually, so local pauses between funding years are normal.
July 2026: ~5,100 households / 10,460 measures / batteries 17%. August 2026: 5,470 / 11,250 / batteries 18%. Each release is archived here with change noted — making this the only continuously tracked WH:LG dataset outside GOV.UK. Source: DESNZ — Warm Homes: Local Grant statistics, August 2026 (published 27 August 2026). Figures are provisional.
Solar leading at 38% confirms councils fund the highest-impact measures — if you’re eligible, a funded solar+battery package is realistic, not theoretical. Rising battery share (17→18%) shows storage riding along. Check the three routes in, or run your postcode.
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.
5,470 households with 11,250 measures to end-July 2026 (DESNZ, Aug 2026 release) — with ~14,700 TrustMark lodgements suggesting more to be validated.
Solar PV at 38% of installations, then insulation 24% and battery storage 18%.
Thursday 26 November 2026 — this tracker updates the same day.
No — provisional, and likely to revise upward as Grant Recipient and TrustMark records are validated.
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.
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