The world pipeline for energy storage on the utility side of the meter has doubled in the past year, reaching 3.4GW, according to new research by I.H.S.

Led by a record-breaking final quarter, energy storage reached 336MWh in 2016, growing 100% in megawatt-hours from 2015’s installed capacity, despite staying roughly flat in megawatts with 221MW deployed last year.

Anthony Price of consultancy Swanbarton previews the International Flow Battery Forum in Germany with a quick primer on the technology, its uses and some of the players attending the event.

A US energy company is testing power-to-gas systems that store energy from renewable energy production, including solar power, during times of excess supply.