Inertia could provide a strong boost to BESS project returns in Germany, but operators are still waiting for the first prequalified inverters.

If BESS are to be given restricted grid access, they should be given a commensurate reduction in the BKZ fee, Marie-Sophie Braun, head of markets & regulatory affairs for developer Kyon Energy, said.

Oil and gas major TotalEnergies has taken a final investment decision (FID) and started construction on a further six BESS projects in Germany, with Saft to provide the battery technology.