Energy storage firm Powervault has announced a supply partnership with Renault, aimed at reducing the cost of smart home battery units by 30 percent.

The French automaker will supply 50 batteries from electric vehicles, as part of a trial to explore the performance of second life batteries in storage units.

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M&S Energy customers and schools in the South East of England will test the batteries.

Powervault believes the reduction in cost and potential long-term savings could be the tipping point, pushing home energy storage to the mass market in the United Kingdom.

“The collaboration we are announcing today with these two household name brands – Renault and M&S – is an important milestone on our journey towards achieving mainstream adoption of home energy storage,” said Joe Warren, Managing Director of Powervault.

“Homeowners and brands are now looking to benefit from the smart power revolution. It’s only a matter of time before a Powervault becomes as common in households as a dishwasher.”

How it works

Powervault works by taking solar energy and storing it into batteries. The additional energy captured during the day is used throughout the night. It also takes energy from the grid at off-peak times, reducing the cost of electricity in households without solar panels.

The company expects to sell 30,000 Powervault units by 2020, on the back of the 842,000 solar panels which were installed in the past five years in Britain.