Developer-operator GridStor has acquired a battery energy storage system (BESS) project in Oklahoma, US totalling 200MW/800MWh from Black Mountain Energy Storage (BMES).

Amendments to rules for battery storage state-of-charge (SOC) in the ERCOT, Texas, market are ‘an improvement’ to the current ones but will still impact the ability of batteries to provide ancillary services, Gridmatic has said.

A 250MW/1,000MWh battery energy storage system (BESS) project in Arizona will soon break ground, utility SRP and developer Plus Power said.

The US Midcontinent Independent System Operator (MISO) has included energy storage into its market portfolio for the first time.

Pacific Gas & Electric (PG&E), one of California’s three main investor-owned utilities, has said that 1,400MW of battery storage is to be deployed in its service area by the end of 2023 will keep the company on-track to meet statewide renewable energy goals “while ensuring grid reliability”.

US wholesale energy provider Southern Power is adding battery energy storage to two solar sites in California.

There are 7GW of battery energy storage projects that have either been proposed or are in the planning process in Australia, with the average project in that pipeline sized at around 150MW.

Stem Inc is set to be publicly-listed and expand its global reach through a deal worth as much as US$608 million, agreed with special purpose acquisition company Star Peak Energy Transition Corp.

The US Department of Energy’s (DOE) assessment of reliability and security of the country’s electrical grid network is “encouraging”, the Energy Storage Association’s head has said in her initial reaction to the report’s publication.