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Heat battery grants and VAT: the UK position

Announced support is not the same as an open application route. Check the current official position before relying on a heat battery grant or VAT treatment.

HBGBy the Heat Battery Guide team
Updated 10 November 2026 · 6 min read
Money guidanceThis is general information, not financial or tax advice. Rules change, so check GOV.UK or speak to a qualified adviser.

Do not deduct a heat battery grant from your budget until an installer can show that your proposed system and application meet the current official rules. Government has announced support for heat batteries, but the live GOV.UK application page checked on 10 November 2026 does not list them among the technologies currently claimable.

The short answer

The planned Boiler Upgrade Scheme grant is £2,500 for an eligible heat battery once the required product, design and installation standards are in place. The government's scheme response ties eligibility to whole-home space heating and hot water, rather than a hot-water-only store.

That is a plan, not proof that a particular product or installation can claim today. Use the official “what you can get” page as the current application check.

VAT is a separate question

The GOV.UK consumer list for reduced-rate energy-saving products names specific technologies and conditions. A heat battery is not automatically the same thing as an electrical battery for storing electricity. Ask the installer to state the VAT treatment on the written quote and the basis used.

What to verify before signing

  • Is the application route open on GOV.UK now?
  • Is the proposed technology explicitly listed?
  • Does the system provide the required space heating and hot water?
  • Are the product and installer certifications in force?
  • Is the grant shown as an upfront discount rather than a later promise?
  • Does the quotation separate VAT and explain the applied rate?

Be wary of “grant ready”

Marketing language does not establish eligibility. Standards, regulations and scheme guidance can change between a product announcement and an installed system.

Keep a dated evidence pack

Save the official eligibility page, quotation, certification details and installer explanation at the time of application. Do not rely on a screenshot shared in a social post.

Your next step

Check the linked GOV.UK pages on the day you request the quote and again before paying a deposit. If the installer claims support, ask them to identify the exact scheme rule in writing.

Sources

Primary and independent references checked by our editorial team.

  1. Apply for the Boiler Upgrade Scheme: what you can get — GOV.UK Checked 10 Nov 2026
  2. Boiler Upgrade Scheme and certification requirements — GOV.UK Checked 10 Nov 2026
  3. VAT on energy-saving products — GOV.UK Checked 10 Nov 2026