BMW i3 batteries used in National Grid storage facility
Six shipping container-sized units house 22 megawatts of storage for Pen y Cymoedd wind farm.
A 22-megawatt storage facility has been put in place at the Pen y Cymoedd onshore wind farm in South Wales, comprising more than 500 BMW i3 battery packs.
The i3 packs, which have been only slightly modified for their use in the facility, are housed in six units. Pen y Cymoedd contains 76 turbines, with the potential to power more than 13% of homes in Wales annually.
The company behind the facility, Swedish green energy firm Vattenfall, revealed that the storage plant is its largest, providing the UK's National Grid with power in high-demand times to even out supply.
The National Grid has been criticised in recent months over fears that, as electric vehicle ownership picks up, local grids will not be able to keep up with the demand of multiple EV owners charging their cars simultaneously.
Systems such as the new storage facility could help to quell this risk, as well as allowing equivalent emissions of electric vehicles to fall further as the proportion of UK energy generated from renewable sources continues to grow. In mid-2017, equivalent emissions for EVs had fallen by 10% over 2016 and is only a third of those from five years before.
Vattenfall’s senior vice-president of wind, Gunnar Groebler, said: “Vattenfall is on the road to a smart, digitalised future, free from fossil fuels. I can think of few other energy installations that better demonstrate what that future looks like than this battery installation.”
The company believes that storage and generation facilities such as the one now in Pen y Cymoedd are a growing phenomenon.
It’s the latest in a series of vehicle-based grid innovations, including Nissan’s vehicle-to-grid system, as well as Renault’s PowerVault units that are made from recycled batteries previously used in the Zoe.
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