Storage A 1 MW / 100 MWh – so 100-hour duration – sand-based thermal energy storage battery has been commissioned at Pornainen, in southern Finland. The project will deliver heat to the local district heating network. Long-duration thermal energy storage really is very cost-efficient (this one uses 2,000 tons of pulverized soapstone) as long as the desired output is heat, not electricity. Green Flexibility is to supply a 40 MW / 80 MWh BESS unit to German grid operators LEW Verteilnetz and Bayernwerk. The project is intended to place no additional burden on the grid, requiring no grid capacity during times of high feed-in A 150 MW / 1.2 GWh thermal energy storage project is to be built at the…