Matrix Renewables signs 500 MW battery optimization agreement with EDF

Matrix Renewables has signed a long-term battery optimization agreement with EDF for its first standalone BESS in the United Kingdom, expected to enter commercial operations in summer 2027.

The agreement covers the 500 MW/1 GWh Eccles BESS, which is situated near a key transmission bottleneck on Great Britain’s electricity grid.

EDF will provide route-to-market services and optimize the battery across UK power markets under the agreement once the asset becomes operational.

Engineering, procurement and construction work on the Eccles BESS is being carried out by Tesla. Matrix Renewables announced in December 2025 it had signed an agreement with the US-headquartered company for the design, construction and commissioning of the project.

Once operational, the Eccles BESS will be optimized using EDF’s Powershift platform. Stuart Fenner, commercial director of business and wholesale services at EDF commented: “Using our Powershift platform, we will optimize the battery in real time to support grid stability, manage peak demand and help integrate more low-carbon generation.”

Matrix Renewables has more than 15.5 GW of solar, energy storage and green hydrogen projects at various stages of development on its books globally – with roughly 4 GW operational, under construction or “ready to build” according to the company. The developer is a relative newcomer to the UK battery storage market, however, having acquired the Eccles BESS along with the 500 MW/1 GWh Kilmarnock BESS in a deal announced in April 2025.

Founded in 2020 and backed by global asset manager TPG, Matrix Renewables is expected to expand its BESS and solar footprint in the United Kingdom. The developer said it has a pipeline of more than 3 GW worth of solar and energy storage projects for the UK market.