UK electricity distributor Northern Powergrid has started using a 2.5MW battery system in Darlington to sell services to support the National Grid.
The company said it has been using the battery since September to maintain the electricity network at a stable frequency, the first time it has provided balancing services to National Grid.
The project, delivered in partnership with demand response and energy storage aggregator Kiwi Power, is the size of three storage containers.
Northern Powergrid head of trading and innovation Jim Cardwell said: “Batteries are set to transform the way we deliver and use electricity, and will play a key role in achieving the government’s long-term vision for a smart, flexible, low-carbon energy system.
“We will use this project to learn how they can help us deliver best service to our customers.”