In September, it will connect its 1MWh SCiB lithium-titanate battery to the 11kv grid at Western Power Distribution's Willenhall primary substation near Wolverhampton.

The University of Sheffield, which is leading the project, expects to start operations in November.

Last January, Tokyo-based Toshiba said it had started a five-year storage test in Madrid with Spanish utility GasNatural Fenosa (GNF) and Japan’s New Energy and Industrial Technology Development Organisation (NEDO).