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Rendering of a large-scale flow battery project, with electrolyte tanks and battery stacks in foreground, surrounded by renewable energy generation and industrial operations.

Non-lithium energy storage startups Fourth Power, Unbound Potential and XL Batteries raise financing

September 24, 2025
A trio of energy storage startups: XL Batteries, Unbound Potential and Fourth Power, have raised financing for emerging flow battery and thermal storage technologies.
Form Energy's scalable battery storage tech involves rusting and then de-rusting iron as it discharges and charges. Image: Form Energy.

Form Energy in talks with Georgia Power for 100-hour iron-air battery storage project

February 10, 2022
Multi-day battery storage tech startup Form Energy is working with Georgia Power on a potential 15MW/1,500MWh project in the US utility company’s service area. 
The 2MW/8MWh VRFB Sumitomo Electric supplied for utility SDG&E in California. Image: Sumitomo / SDGE.

ROUNDUP: California VRFB microgrid trial complete, Acciona tries zinc-bromide batteries, Lithium-sulfur startup Zeta nets US$23m financing

February 7, 2022
News in brief from around the world in energy storage.

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SPP utility to invest over US$600 million in 1.9GWh BESS projects to address ‘significant capacity deficit’ 

Origin, Eku Energy submit 2,200MWh of battery storage applications to Australia’s EPBC Act

VPI and ADS-TEC reveal combined 1.7GW German BESS plans

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