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. Your proposal must deliver a project development study that includes: technology assessment engineering design cost and scale-up roadmap market assessment development plan manufacturing and supply chain plan This is Phase 1 of a planned two phase competition, with Phase 2 scheduled to launch in the middle of 2027. A further funding of at least £10 million has been allocated for a planned Phase 2, to support the development and delivery of large scale ULDES demonstrators. The award of funding for the project development study under this Phase 1 will not be a condition of eligibility for Phase 2. Eligible businesses are strongly encouraged to use this Phase1 competition to address the practical delivery issues that determine whether projects can move from concept to construction. In applying to this competition, you are entering into a competitive process. This competition has a funding limit, so we may not be able to fund all the proposed projects. It may be the case that your project scores highly but we are still unable to fund it. We consider a range of factors when determining whether to provide funding to applicants. This includes an assessment of prior conduct, for example, any outstanding payments owed to Innovate UK or UKRI. Such factors may influence the funding decision, potentially resulting in a refusal of funding or an award subject to additional scrutiny. We also reserve the right to adjust funding allocations for any of our competitions. This may be in response to changes in policy, portfolio funding considerations or broader government funding decisions. This competition closes at 11am UK time on the deadline stated in this Innovate UK competition brief . We cannot guarantee other government or third party sites will always show the correct competition information.