STEPHENTOWN -- A high-tech flywheel plant, touted as one of the nation's most innovative energy projects at its opening this summer, has had two massive, rapidly spinning underground flywheels fail ...

Beacon Power forecasts that it will provide one megawatt of storage to the electricity grid using its flywheels by the end of the year. Martin LaMonica is a senior writer covering green tech and ...

Britain is turning to an age-old technology to stabilise its power grid as coal and gas plants are phased out and replaced with renewable energy. Grid operators are increasingly relying on heavy ...

Britain's energy operator is betting on an age-old technology to future-proof its grid, as the power plants that traditionally helped stabilise it are closed and replaced by renewable energy systems.