In this US news roundup, e-Storage, Spearmint Energy, and OCI Energy advance battery energy storage system (BESS) projects and financing in Michigan and Texas.

AEMO has set out a storage requirement of almost 50GW in its latest 2026 Integrated System Plan (ISP), split between 35GW of short and medium-duration battery storage for daily firming and 5GW of long-duration energy storage (LDES) for seasonal reliability.

Market research firm Wood Mackenzie predicted that the US energy storage market will almost quadruple over the next six years.

Renewables developer rPlus Energies has announced start of commercial operations for the 400MW/1,600MWh Green River Energy Centre in Emery County, Utah, US.

Meridian’s Waiinu Energy Park has been referred for consideration under New Zealand’s Fast-track Approvals Act.

FlexGen and Eos Energy Enterprises, two US energy storage sector companies with different specialisations, have entered the European market.

Energy storage developer-operator Aypa Power and utility Salt River Project (SRP) have brought the 250MW/1,000MWh Pediment energy storage project online in Mesa, Arizona.

Energy Dome is advancing a 10-hour CO2 Battery project in Arizona, with SRP and Google, while Invinity announces the sale of North America’s largest VRFB, in California.

AESC has announced a strategic supply partnership with BESS system integrator Prevalon Energy.

Ontario, Canada’s Independent Electricity System Operator (IESO) has secured 640MW of new capacity through three projects selected under the capacity stream of the Second Long-Term Request for Proposals (LT2).