en.Wedoany.com Reported - Frontier Power Energy Holdings has acquired the interests in the Ayr and Busby long-duration energy storage (LDES) projects held by Apatura Energy. The two projects have a combined capacity of 350 MW/2.8 GWh, with the Ayr project planned for 200 MW (1,600 MWh) and the Busby project for 150 MW (1,200 MWh). The projects plan to deploy long-duration battery systems provided by Eos Energy Enterprises (including its Z3 technology platform).

The projects have received Gate 2 notices under the grid connection reform process of the UK National Energy System Operator (NESO), aimed at supporting the UK power system and the "Clean Power 2030" target. Frontier plans to advance these projects as part of its long-duration energy storage portfolio and seeks to participate in the Cap and Floor mechanism of the UK Office of Gas and Electricity Markets (Ofgem).

In October 2025, Frontier Power formed a strategic joint venture with an affiliate of Cerberus Capital Management to accelerate the development of long-duration energy storage projects across the UK. Under the collaboration arrangement, Cerberus will provide an initial investment of £44 million as the first phase of a broader commitment (up to £159 million) to support Frontier's portfolio of regulated energy storage assets. The joint venture aims to develop at least 16 projects eligible for the Cap and Floor mechanism, with a total energy storage capacity exceeding 20 GWh.

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