Battery Storage Grants UK 2026: What Actually Exists

The one real saving: 0% VAT (until 31 March 2027)

The 0% VAT rate on domestic battery storage under HMRC's VAT Notice 708/6 is the single tax break every UK homeowner can use. It covers standalone batteries, retrofits to an existing solar array, and hybrid solar-plus-storage packages, and it applies to both the hardware and the fitting labour under a supply-and-fit contract with a VAT-registered installer.

The zero rate is scheduled to end on 31 March 2027. From 1 April 2027 the rate reverts to the 5% reduced rate for energy-saving materials — not 20%. On a typical £7,000 fitted installation that's roughly £350 of difference; on a £4,500 install it's about £225. It isn't a grant, but it is the largest single incentive you can rely on today. Full detail on our dedicated 0% VAT deadline page.

ECO4 (Energy Company Obligation)

ECO4 is a supplier-funded scheme for low-income and vulnerable households, targeting insulation, heating upgrades and — occasionally, via local authority 'Flex' routes — solar PV. It does not fund home batteries. ECO4 is scheduled to close on 31 December 2026 and will be replaced by future obligations under the government's Warm Homes Plan.

Verdict: not a battery grant. If a lead-generation ad claims otherwise, it is either misrepresenting the scheme or bundling a very rare local pilot as though it were nationwide.

Great British Insulation Scheme (GBIS)

GBIS closed on 31 March 2026 and was insulation-only throughout its life. It never funded batteries or solar. It's included here purely because it still shows up in old search results and installer copy.

Verdict: closed, and irrelevant to storage.

Home Upgrade Grant (HUG2) and Warm Homes: Local Grant

HUG2 closed to new applications. Its successor, the Warm Homes: Local Grant, funds insulation, heat pumps and — in some council areas — solar PV for lower-income households in England off the gas grid or in the least efficient homes. It does not fund electrical home batteries.

Verdict: not a battery grant. Worth knowing if you qualify on income grounds and want solar or a heat pump, but it will not pay for a battery.

Boiler Upgrade Scheme (BUS) — and the 'heat battery' confusion

The Boiler Upgrade Scheme pays a grant towards replacing a fossil-fuel boiler with an air-source or ground-source heat pump, or a biomass boiler. In 2026 the government added a £2,500 grant for 'heat batteries' — which is where a lot of confusion comes from. A heat battery is a THERMAL storage unit that stores heat as hot water or in a phase-change material to run your central heating and hot water. It is not an electrical battery like a Powerwall, GivEnergy or Fogstar unit, and cannot power your fridge, EV or evening peak load.

Verdict: not a home-battery grant. If you're getting a heat pump, look at BUS. If you want to store electricity, it doesn't apply.

Warm Homes Plan — loans, not grants, from 2027

The government's Warm Homes Plan (announced January 2025 and expanded in March 2026) will support home batteries — but via low-cost, government-backed LOANS, not grants. Phased rollout begins in 2027, prioritising households upgrading heating or adding solar. The £2,500 grant referenced in Warm Homes Plan messaging is the heat-battery (thermal) grant described above, not an electrical-battery grant.

Verdict: for now, plan on paying for your battery. Watch for the loan scheme from 2027 if you'd prefer to finance rather than pay upfront.

Scotland: Home Energy Scotland

Home Energy Scotland previously offered interest-free loans covering solar PV and batteries. Those solar and battery loans were WITHDRAWN in June 2024. Current HES loans and grants focus on heat pumps and other clean-heat measures, not batteries.

Verdict: no live battery support in Scotland. If Scottish loan schemes reopen, we'll update this page.

Wales: Nest

The Welsh Government's Nest scheme is means-tested and aimed at low-income households, especially those with health conditions worsened by cold homes. Where a home is eligible, a fully-funded solar-plus-storage package can be installed as part of a wider energy upgrade — including a battery.

Verdict: this is the closest thing to a real 'battery grant' anywhere in the UK, but only for eligible low-income Welsh households. Most homeowners will not qualify.

Switch Together (formerly Solar Together) — a bulk-buy, not a grant

Switch Together is a council-run group-buying scheme, previously branded Solar Together. Households in participating council areas register their interest, installers bid for the combined volume, and residents get a fixed group price for solar and/or a battery. Battery-only options are available in some rounds.

Verdict: no public money is paid to you and there's no subsidy — the saving is purely from bulk pricing. Worth entering if your council is running a round, but it's a discount, not a grant.

Smart Export Guarantee (SEG) — not a grant, but useful

SEG obliges licensed electricity suppliers to pay you for electricity you export back to the grid. Rates vary from around 1p/kWh at the low end to 15p/kWh or more on the best tariffs. A battery paired with solar lets you time your exports (or self-consume more), which usually earns more than exporting spikily at midday.

One important caveat: many suppliers now meter or restrict payments so you only get paid for exported SOLAR — not for cheap 'brown' electricity you charged from the grid overnight and then dumped back. Read the small print of the specific SEG tariff before assuming grid-charge-and-export arbitrage will pay.

Verdict: not a grant, but a real ongoing revenue stream that improves the payback maths.

Demand Flexibility Service and supplier saving sessions

This is where batteries can earn money without any grant at all. Under the National Energy System Operator's Demand Flexibility Service, and equivalent supplier 'saving sessions', households can be paid to reduce or shift consumption during peak periods — typically autumn and winter evenings. A battery makes this effortless: you discharge to cover the peak, get paid per kWh shifted, and recharge overnight on cheap rates.

From April 2026 the scheme has expanded to include bi-directional flexibility, meaning suitably enrolled batteries and EV chargers can be paid to export as well as to reduce demand. Payments and eligibility are set by the supplier (Octopus, OVO, E.ON Next and others have offered sessions).

Verdict: not a grant, but the most credible 'batteries earn money' angle in 2026.

Supplier own-brand schemes

No mainstream UK energy supplier currently subsidises home batteries with a grant. Octopus Energy's own-brand 'Nook' battery, announced for sale from 2027, is a retail product — not a funded scheme. Where suppliers offer £50–£100 credits for signing up to smart tariffs alongside a battery, those are marketing incentives, not battery grants.

Verdict: no supplier grants exist. Compare tariffs on their own merits.

How to think about all of this

For most UK households the honest financial picture in 2026 is: pay 0% VAT now, pair the battery with a smart tariff (Intelligent Octopus Go, Cosy, EV tariffs) to charge cheap and discharge at peak, and add SEG plus a flexibility scheme on top. That combination — not a grant — is what makes a battery pay back in roughly 7–12 years on typical UK usage. Use the calculator to model your own numbers before you commit to any install.