Independent power producer (IPP) RWE has commissioned a 35MW/41MWh BESS in the Netherlands, while commissioning is progressing on a smaller system with grid-forming capabilities.

On day one of the Energy Storage Summit Australia 2025, the audience heard that although 2 to 4-hour duration battery energy storage systems (BESS) are favourable, longer durations are starting to challenge this.

Developers entering competitive solicitations for energy storage have been offered advice on how to be successful.

“BESS project financing is rapidly evolving,” says Niall Brady of Australia’s Clean Energy Finance Corporation (CEFC).

In light of lengthy interconnection delays, independent power producer (IPP) NextEra Energy Resources (NEER) has successfully renegotiated the terms of an offtake agreement associated with one of the developer’s solar and storage projects located in Clark County, Nevada. 

Further developments from the California Independent System Operator (CAISO) market including new standards for BESS maintenance and operation and new BESS capacity announced by SDG&E.

February 2025 saw around 4.5GW/10.5GWh of grid-scale BESS deployments globally, with China continuing to account for the majority but Europe increasing its share from January.

The UK government has published a Technical Decision Document confirming crucial aspects of its long duration electricity storage (LDES) cap-and-floor scheme, which includes increasing the minimum duration required from six hours to eight.

MW Storage has enlisted optimiser Entrix to commercialise 50MW/100MWh of the capacity of a project twice that size in the town of Arzberg, Germany.

Energy storage technologies must have the best protections available from hacking threats, writes Adile Ajaja, director of operations, IT and cybersecurity at EVLO.