RES has sold the consented 35MW Port of Tyne battery storage project in northeast England to infrastructure investor Foresight.
The installation is the largest to be selected for a National Grid enhanced frequency response contract and also holds a 12-year capacity market deal.
RES will build the installations for Foresight, which has an operational portfolio of more than 80 solar PV and 28 energy from waste projects.
Construction is due to start immediately with commissioning due in early 2018.
Foresight partner Dan Wells said: “The acquisition consolidates Foresight’s position as a leader in investing both in renewable energy generation and the flexible grid infrastructure required to accommodate increasing penetration of renewables, such as energy storage.”
RES managing director Rachel Ruffle said: “Energy storage has a crucial role to play in delivering a flexible electricity network to support the UK’s economic growth and enable more low cost, renewable energy to be used. As a leader in the energy storage market RES prides itself in delivering projects that meet the needs of our clients and society.”