The hybrid energy source, Energy nest, with a total current output of 30 MW to the grid, represents such a solution by combining gas turbines and battery storage, and opens a range of possible solutions for providing ancillary services for power balance.
[pdf] This energy storage system plays a crucial role in stabilizing the local power grid. By storing excess energy generated during peak solar production, the system can release power during periods of high demand or low solar generation.
[pdf] The project concept and design is based on a state-of-the-art technology of hybrid operation between the existing hydropower plant turbines of UHE with new utility-scale battery energy storage systems (BESS) to provide a quick frequency response to the national power grid, while simultaneously reducing the wear–and-tear on the hydro units, extending their overhaul interval and lifetime, improving the overall power system reliability, and reducing operational costs.
[pdf] 
