While the relationship between renewable energy and energy storage is a close one, combining storage with natural gas is also an important stepping stone measure in the transition to 100% renewables, Energy-Storage.news has heard.

Project financing for six large-scale energy storage systems in Germany has been helped along by due diligence provided by testing, certification and knowledge services group TÜV SÜD.

A ‘hybrid’ plant for storing wind energy in batteries has been constructed by infrastructure and energy firm Acciona in Spain, thought to be the first such project in the country.