Siemens Energy has entered a long-term partnership with Norwegian thermal energy storage company EnergyNest, seeking to incorporate its market-ready storage units in projects.

EnergyNest has developed a thermal battery consisting of modular 20-feet intermodal containers that use inexpensive heat conducive concrete in steel casings as storage medium.

The concept has some similarities to a thermal storage battery consisting mostly of hot rocks, which Siemens’ wind turbine subsidiary Siemens Gamesa has built as a pilot plant in Hamburg.

“Energy storage is the key to a decarbonized world,” said Jörn Schmücker, chief executive for large rotating equipment at Siemens Energy and sponsor of the initiative.