The operators of electricity storage batteries are emerging as rare winners from the UK energy crisis, as the need to prepare for the threat of blackouts this winter intensifies and market volatility increases. Gresham House and Pivot Power are among the companies benefiting from rising volatility in the electricity market as they sell the power to the grid when prices are high and charge up the batteries when they are lower. “There’s a huge advantage of being active now,” said James Bustin, investment manager at Gresham House, the UK’s largest battery storage operator.