Wind-farm operators don’t say much about turbine-power demands. But just how much energy do wind turbines use?

Utilities are building massive batteries to store renewable energy and replace polluting fossil fuel power plants.

Vineyard Wind has begun delivering energy to the power grid from five of its planned 62 wind turbines, company and state officials said.

Actively dictating the wind flow in any offshore wind power plant has likely been the dream of developers and engineers since the first turbines were installed in Danish waters in 1991. Siemens ...