Vattenfall , the Swedish energy company , is to build one of the UK ’s largest battery storage facilities near Swansea . Work on the 22 MW plant , which will use six shipping containers filled with lithium - ion batteries produced by BMW , will begin in July . The scheme will share a site with the Pen y Cymoedd wind farm , the largest in England and Wales , but will not store its electricity . Instead , the batteries will help the National Grid cope with the fluctuations associated with renewable energy . Vattenfall stated that the site - specific aspect of the project had reduced costs by £ 5 m ( $ 6.5 m ) .
Vattenfall, the Swedish energy company, is to build one of the UK’s largest battery storage facilities near Swansea. Work on the 22 MW plant, which will use six shipping containers filled with lithium-ion batteries produced by BMW, will begin in July. The scheme will share a site with the Pen y Cymoedd wind farm, the largest in England and Wales, but will not store its electricity. Instead, the batteries will help the National Grid cope with the fluctuations associated with renewable energy. Vattenfall said that the site-sharing aspect of the project had reduced costs by £5m ($6.5m).