Residential battery energy storage systems (BESS) across California discharged more than 580MW of peak power to the state’s grid on the evening of 9 September 2026 via a Tesla-Sunrun VPP.

Utility PG&E has selected six new California microgrid projects for a US$30 million investment, while Massachusetts’ Department of Energy Resources is awarding US$40 million across 36 BESS projects.

What is repetitive re-trading (RTT) by BESS in the UK, and what is NESO looking to do about it?  

Lightsource bp has referred a hybrid wind, solar and BESS facility to the federal government for assessment under the EPBC Act.

A US battery storage pilot sponsored by tech giant Google has demonstrated how batteries can capture surplus renewable energy and deliver it during hours with greater fossil generation.

Poland’s grid-scale storage market has reached an impressive scale in the last few years, helped by the capacity market and various government schemes, but numerous challenges now need to be overcome.

System integrator Fluence and lithium-ion battery OEM Eve Energy have struck a massive 206GWh battery supply framework agreement for 2027-31, one of the largest deals of its kind ever announced.

In this US news roundup, Eos has received an advance on its DOE loan, FlexGen and Lighshift have partnered on 16 BESS projects, and Georgia Power has energised a 128MW BESS.

A roundup of some of our key takeaways from the Energy Storage Summit Germany this week, including around FCAs, inertia, the capacity market (CM), EU restrictions on China, and the future of one very notable system integrator.

Interconnection costs for utility-scale energy storage in California are significantly lower than in other major US markets, with developers also benefiting from network upgrade cost reimbursements unavailable elsewhere, according to a senior executive at Rev Renewables.