Welcome to the Aqueous Battery Brief. In this week’s roundup: Eos’ Line 2, Invinity’s major sale, and much more.
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Adoption, Deals, and Tech
Eos Starts Commercialization of Battery Line 2
Zinc systems developer Eos Energy Enterprises has started commercial production at its Pennsylvania-based manufacturing facility following the company’s successful completion of Site Acceptance Testing for its Battery Line 2.
With its Battery Line 1 already deployed, the Line 2 production shows the company has demonstrated an ability to replicate, improve, and implement automated battery production at a second facility as well.
Read details in the company press release.
Invinity Sells 32 MWh System to Pacific Steel Group
Vanadium flow developer Invinity Energy Systems has sold a 32 MWh system to leading U.S. reinforcing steel fabricator Pacific Steel Group.
Collocated with a solar array rated at over 40 MWp, Invinity’s battery will be the largest vanadium flow battery system in North America to date. The array will power the facility’s operations recycling 500,000 tons of scrap metal annually.
Details in the announcement on Invinity’s website.
Printing the Tiniest Coin Cells
IoT devices are getting thinner and smaller – but legacy coin cells can only get so tiny. As coin cells shrink, the small batteries’ internal resistance increases.
Zinc-manganese dioxide player Zinergy has a solution to the technological deadlock. The firm’s printed batteries use a planar architecture to move active materials from a rigid metal casing to a much larger, thinner surface area – improving current distribution and reducing internal resistance.
Read the company’s description of the innovation on Think WioT.
The IEC’s Take on Flow
ESS News sums up the International Electrotechnical Commission (IEC)‘s perspective on storage tech the energy ecosystem should look to – particularly in light of recent geopolitical instability driving major energy repercussions.
The overview includes a look at flow batteries, a market valued at $1.22 billion in 2026 and projected to reach $2.88B by 2034.
- Read the overview at ESS News.
- For a deeper dive on Flow, go to the IEC Technical Committee’s longer article on flow batteries from 2025.
A Stellar 2026 So Far
In the first half of 2026:
- Octet’s additive library hit 450 molecules.
- Over 65% of Octet’s clients are new.
- Clients now turn to us for day one guidance on developing the most effective electrolyte from the start.
Read about Octet’s achievements and the industry’s growth in a banner 1H.
Mark Your Calendars
Webinar: Form Energy
Clean Energy Group‘s next Beyond Lithium webinar will spotlight iron-air giant Form Energy. Hear from Sarah Jackson, Form’s Director of Government Affairs. Time: August 6th 2026 @ 1PM ET. Details & Registration
📆 Get ahead of your planning with the Aqueous Energy Events Calendar in our December 29th Aqueous Battery Brief.
Who’s Hiring
Seeking a new role — or know someone who is? Start with the quick links to aqueous firms’ open roles pages below.
Have a specific open position you’d like to highlight? Send us an e-mail.
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