Wales Vattenfall has won a contract to build a 22 megawatt battery facility at its Pen y Cymoedd wind farm in Wales, which will help to support the stability of the national grid in the UK.

Existing frequency response services , including pumped storage plants, are able to respond to frequency fluctuations within 10 seconds at best.  National Grid, the UK’s transmission service operator, will now benefit from a new service called Enhanced Frequency Response (EFR), with giant lithium ion batteries able, within milliseconds, to deliver or absorb electricity to and from the grid for a duration of 15 minutes.

Vattenfall was selected as one of eight vendors in a highly competitive tender. 70 suppliers competed for the contracts. In total the EFR service tender secured 200MW of battery storage capacity. Vattenfall’s facility will provide 22 MW of this.

The battery facility will be built at the site of  Vattenfall’s 228 MW wind farm Pen y Cymoedd in Wales.

Stephen Holdroyd, Senior Development Manager at Vattenfall says:
“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.”

Vattenfall is already involved in various types of battery solutions in other markets, such as Germany.

The battery facility is to be completed in 2018 and the National Grid contract is for four years.  The focus is now on finalising design elements and securing the necessary permits ahead of an Final Investment Decision.

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