The United Kingdom battery energy storage system (BESS) market size plays a critical role in assisting the country’s transition toward a low-carbon and resilient energy system. Battery energy storage systems enable efficient integration of renewable energy sources such as wind and solar by balancing supply and demand, enhancing grid stability, and lowering dependency on fossil-fuel-based power generation. The market provides services to data centers, renewable energy developers, utilities, and industrial users throughout the United Kingdom.