The Heat Pump Investment Accelerator Competition (HPIAC), worth up to £90 million in total, aims to bring forward investment in the UK heat pump manufacturing supply chain.

It is open to UK registered businesses (which includes those that may be set up for the purpose of delivering the project in the application), who can apply for grant funding of up to £30 million per project, for major investments in the manufacture of heat pumps and strategically important heat pump components.

The guidance outlines the process through which we will allocate scheme funding. It details:

how the scheme works
the eligibility criteria
how to apply
how applications are assessed
how funding is allocated, including the contractual arrangements
how successful projects should report progress

How to apply

The competition is open for applications.

Read the guidance and all associated documentation.
Complete the application form and supporting templates.
Submit them to heatpumpaccelerator@energysecurity.gov.uk by 3pm on Wednesday 5 August 2026.

Question and answer sessions

We will be hosting question and answer sessions for interested parties in the week beginning 18 May 2026.

Email heatpumpaccelerator@energysecurity.gov.uk to register your interest by Friday 8 May 2026.

Updates to this page

Published 30 March 2023

Last updated 25 June 2026 — Show all updates

25 June 2026
Published the latest clarification questions.
3 June 2026
Published the latest clarification questions.
28 May 2026
Published the latest clarification questions.
14 May 2026
Published the round 2 application form
21 April 2026
Added the deliverability assessment template (business case) document.
21 April 2026
Updated with information about round 2 of the competition.
21 November 2024
Added link to Heat Pump Investment Accelerator Competition's successful projects.
4 December 2023
This competition is closed to applications.
11 October 2023
Added latest clarification questions with responses.
29 September 2023
We’ve extended the closure date for the submission of proposals to 3pm on 18 October 2023.
22 September 2023
Added latest clarification questions with responses.
4 August 2023
We have published a slidepack from our stakeholder sessions, 26-27 July 2023, and our responses to clarification questions received up until 28 July 2023.
4 July 2023
This competition is now open to applications.
30 March 2023
First published.

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Heat Pump Investment Accelerator Competition: round 2

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