Project III Lockleaze is a 20MW hybrid battery storage project in UK of Hazel Capital
The Rounponds facility provides frequency response services to National Grid. The 20MW Fast Frequency Respnoce project, the first of its kind in the UK, belongs to Hazel Capital and contains 2 gas engines of 1250kVA (1000kW).

This complex project includes a hybrid solution combining the following elements, working under a sophisticated control system in order to provide grid stabilization services.

36 Diesel generators
4 Li-ION battery blocks
16 VRLA battery blocks