Press release | 2016-08-26 | 14:13 PM

Battery charged up with tender success

Vattenfall has won a contract from National Grid in a highly competitive auction to provide a service that will help keep the lights on.

The enhanced frequency response service from a group of connected batteries, at its Pen y Cymoedd Wind Energy Project in south Wales, will support stability in power flows in the electricity network.

Battery@PyC will deliver or absorb up to 22MW of electrical power for a duration of up to 15 minutes. It is believed that this will be a first for Wales.

Stephen Holdroyd, Senior Development Manager at Vattenfall said: “Our four year contract with National Grid means Battery@PyC will help maintain stability of power supply on the grid within milliseconds when it’s needed. Locating the storage facility at Pen y Cymoedd is a cost effective concept for us and we are excited about what we will learn from this new venture. In fact we have already learnt a huge amount from National Grid’s excellent initiative”.

“Being smart and clean with the energy people want is at the heart of Vattenfall’s strategy. Projects like Battery@PyC will play an important part in the UK’s transition to a low carbon, affordable and reliable energy supply.”

The next step at Battery@PyC is to finalise designs for the project and engage with planning authorities with a view to taking an investment decision in 2017 ahead of full operation in 2018.

For further information, please contact: Rahel Jones; phone number 07970 741047; email

From Vattenfall’s Press Office, telephone: +46 8 739 5010.