Ultra long duration energy storage project development studies

UK registered businesses can apply for a share of up to £3 million for project development studies to support the development of ultra long duration battery energy storage demonstrators in the UK.
Registration Details

03/08/2026 30/09/2026 11:00
Opportunity Type

Funding
Award

A share of up to £3 million for successful projects with a grant funding request of between £350,000 and £700,000.
Organisation

Innovate UK
Find out more and apply

About the competition

Innovate UK, part of UK Research and Innovation (UKRI), will invest up to £3 million from the UKRI R&D Missions Accelerator Programme in this competition. This is to support the delivery of electrochemical ultra long duration energy storage (ULDES) project development studies in Phase 1.

This is subject to a sufficient number of high quality applications being received.

The aim of this competition is to support the development, scale-up, and UK manufacture of electrochemical ULDES technologies. These ULDES technologies must be capable of delivering cost effective electrical power to the UK’s electricity grid with a discharge availability of at least 100 continuous hours. They must also achieve a working life of at least 25 years.

  • Lead organisation

    To lead a collaborative project or to work alone, your organisation must be a UK registered business of any size.

    More information on the different types of organisation can be found in our Funding rules.

    Academic institutions cannot lead or work alone.

    Project team

    To collaborate with the lead, your organisation must be one of the following UK registered:

    • business of any size
    • academic institution
    • charity
    • not for profit
    • public sector organisation
    • research and technology organisation (RTO)

    Each partner organisation must be invited into the Innovation Funding Service (IFS) by the lead to collaborate on a project. Once partners have accepted the invitation, they will be asked to login or to create an account in the IFS. They are responsible for entering their own project costs and completing their Project Impact questions in the application.

    To be an eligible collaboration, the lead and at least one other organisation must:

    • apply for funding when entering their costs into the application
    • include rationale for the collaboration and describe the structure in your application
    • ensure any no single organisation can claim more than 70% of the total project costs
  • We welcome and encourage applications from people of all backgrounds and are committed to making our application process accessible to everyone. This includes making reasonable adjustments for people who have a disability or a long-term condition and face barriers applying to us.

    You can contact us at any time to ask for guidance.

    We recommend you contact us at least 15 working days before this competition’s closing date to allow us to put the most suitable support in place. The support we can provide may be limited if you contact us close to the competition deadline.

    You can contact Innovate UK by email or call 0300 321 4357. Our phone lines are open from 9am to 12pm and 2pm to 5pm UK time, Monday to Friday (excluding bank holidays).

  • Your project must:

    • have a grant funding request of between £350,000 and £700,000
    • last between 3 and 9 months
    • start by 1 January 2027
    • end by 30 September 2027

    Any organisation receiving funding must carry out its project work in the UK, intend to exploit the results in the UK, and spend most of the funding within the UK.

    Projects must always start on the first of the month, even if this is a non-working day. You must not start your project until your Grant Offer Letter has been approved by Innovate UK. Any delays within Project Setup may mean we need to delay your project start date.

    You must only include eligible project costs in your application. See our overview of eligible project costs.

    If your project’s grant funding request or duration falls outside of our eligibility criteria, you must provide justification by email to support@iuk.ukri.org at least 10 working days before the competition closes. We will then decide whether to approve your request.

    If your project does not meet our criteria and you have not requested justification approval, your application will be made ineligible, and it will not be sent for assessment.

  • An online briefing event will be held on 7 August 2026 at 11:00 and a surgery on 27 August at 13:30.

    Register for these sessions.

  • 7 August 2026: Online briefing event and surgery – register to attend

    Briefing slides will be available to download from Supporting Information after the event

    2 November 2026: Applicants notified

    1 January 2027: Project start by

Innovate UK's application and funding process

If you need more information about how to apply, please read our funding support pages. For additional support, reach out to our team of innovation experts who are ready to help you navigate the application process and maximise your chances of success.

For more information

Application support and guidance

Accessibility and Inclusion

Innovate UK welcome and encourage applications from people of all backgrounds and are committed to making our application process accessible to everyone. This includes making reasonable adjustments, for people who have a disability or a long-term condition and face barriers applying to us.

Related event

Event image
Briefing 7 Aug, 11am-12noon. Surgery 27 Aug, 1.30pm-3pm.
Online Ultra Long Duration Energy Storage (uLDES) Competition Briefing

Get in touch

If you have any questions about the scope requirements of this competition, email support@iuk.ukri.org or call 0300 321 4357.


Our phone lines are open from 9am to 5pm, Monday to Friday (excluding bank holidays).

Sector

This opportunity is part of Energy.

Innovate UK Business Connect’s Energy Team is at the centre of our work contributing to delivering the UK’s ambitious Net Zero targets. With specialists in Nuclear, Offshore Wind, Thermal Energy Systems, Batteries, Water, Hydrogen, Sustainable Energy, Grid and Distributed Systems, Electrical Energy Systems and Solar, the team has deep expertise, powerful connections and a track record of successful projects delivering environmental and societal impact.

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