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December 4, 2025 • Estimated reading time: 2 – 3 minutes.
Adoption, Deals, and Tech
Eos Closes $600M Financing
Zinc energy storage giant Eos Energy Enterprises has closed a $600M convertible senior notes offering and registered direct offering of common stock. The move comes as Eos hits $22.6B in commercial pipeline, representing roughly 91 GWh of LDES demand. Read the announcement.
Netherlands €30M LDES Consortium
Dutch battery consortium SLDBatt (short for Sustainable Long Duration Battery Technology), a collaboration of knowledge institutions and companies including aqueous energy firms AQUABATTERY (saltwater) and Elestor (hydrogen bromine) has secured €20M from Dutch government innovation agency RvO, with a total budget of over €30M overall. The group aims to develop 8 to 100 hour storage systems over the next three years. Details on the Elestor site.
KEMIWATT, MANN+HUMMEL Launch China Flow Battery Partnership
French organic flow battery firm KEMIWATT and global filtration technology producer MANN+HUMMEL have announced a strategic partnership to develop a new generation flow battery system in China. Read the announcement.
Enzinc’s Long Collaboration With the Navy
Read about zinc anode developer Enzinc‘s longstanding partnership with the U.S. Naval Research Laboratory to “quickly equip the warfighter and American industry with batteries that are higher performance and don’t catch fire.” Story from TechLink.
For another Enzinc deep dive, check out Octet’s interview with Founder & CEO Michael Burz we shared in October.
Spotlight:
Australian VFB
With a flurry of VFB-related activity in Australia this past week, we decided the region deserved its own spotlight in the stories below. – the AqBB team
Enerflow’s and JENMI’s New Australian VFB
China-based flow battery developer Enerflow and Australia’s JENMI Investment have signed a strategic cooperation agreement to jointly pursue a 350 MW/1,200 MWh vanadium flow battery project, one of Australia’s largest LDES deployments. PV Magazine / Energy Storage reports.
$1M Raise for AVESS Energy
Australian VFB firm AVESS Energy has closed a $1M capital raise. Proceeds will go towards completing battery optimization works, the commencement of the Carbon Innovation Grants Program (CIGP), and deployment of the firm’s 50kW/250kWh prototype at the Windimurra Vanadium Project. This raise follows a recent $2.5M Commonwealth Government grant for the company. Read the announcement.
Western Australian VFB EOI
The state of Western Australian has opened an expression of interest (EOI) process for a 50 MW/500 MWh vanadium flow battery system in the city of Kalgoorlie. The project aims to improve power reliability while supporting the state’s clean energy goals. With a 10-hour discharge capability, the proposed project would rank among Australia’s longest-duration battery installations. More in Energy Storage News.
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