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Eos Energy Storage — Next Big Thing In Energy Storage?

We’re creating a resource page on some of the most standout energy storage options moving towards commercialization. If even one of these technologies makes it to market with the specs claimed, it could change the energy game. Let’s hope that happens.

The first article in this series was about the zinc-iron redox flow batteries Zinc Air Inc. has been developing under the radar up in Montana. In this post, I’ll delve into the claims Eos Energy Storage is making about its own zinc-based batteries, which are initially being targeted for grid storage application.

The battery Eos has been developing is a zinc-air battery, which would probably draw some flags for you if you keep up with this sector of cleantech in a bit of depth. Zinc-air batteries have a number of shortfalls that make them less than ideal for grid storage (i.e. cycle life and efficiency issues). However, in a presentation about Eos that I watched last year (sorry, the video doesn’t seem to be online any longer), the claim was that the company’s zinc-air batteries were nothing like conventional zinc-air batteries — that they had built the batteries from the ground up in a completely different way than was previously done. As far as I know, the details of that are under wraps at the moment, but if you have specific questions, I’m pretty positive we could get folks from Eos to answer those in the comments below.

Based on publicly published documents for its grid-storage battery (the Eos Aurora), Eos is presenting cycle life, cost, and efficiency data that puts its technology in very good light.

As you can see in the image below (click here to see a larger version), the claimed cost is $1,000/kW or $160/kWh, the cycle life is 10,000 full cycles (30 year life), and the storage system has a 75% round-trip efficiency. And, as such, the LCOE is very competitive.

eos aurora

Regarding commercialization, here’s a quote from a document shared with me by one of our dedicated readers: “Eos plans to commercialize its first-generation 1MW/6MWh grid-scale storage product in 2014. This containerized battery can be deployed across the entire electric supply chain and scaled from small building to utility-size applications.”

Eos is currently scaling up prototypes of its battery technology (5kW/30kWh units). They are to be manufactured this year, and are to be delivered to customers in early 2014.

All well and good, if the technology does indeed come to market as laid out — with the specs above — and without any significant drawbacks unmentioned by the company.

Eos Is Bringing In The Money, 1st Partnership Set

As a vote of confidence, Eos notes that one of the largest utilities in the US led a $15 million Series B financing round that was closed in 2012. “Eos is in the midst of its $30M Series C round to support the company’s ramp-up of manufacturing capacity,” the company adds. Furthermore, “Eos has joint development agreements in place or pending with a Top 10 global chemical manufacturer and a leading engineering and manufacturing firm.”

In a more recent public presentation, it stated that it would “develop 100s of MW of energy storage projects through its Genesis Program and through strategic partnership with Convergent Energy + Power.”

Other Eos Battery Benefits

A few more key selling points are that the Eos battery system is “safe, reliable, non-toxic, [and] non-combustible.”

And one more thing that sets the Eos battery apart is that it could be applicable in the electric vehicle market, as well as the grid storage, industrial, and commercial markets. For the EV market, it says it has developed a 70kWh battery that is capable of getting over 350 kilometers of range for $10,000. However, it is initially just starting commercialization of its grid storage battery, the Eos Aurora.

Eos Wrap-up

That’s quite a host of claims. It’s hard to get super excited about any non-commercial technology these days, especially when the claims are so big — many things look promising in the lab but don’t come out as hyped when they hit the market. But, aside from no one else cracking the zinc-air code in the way that Eos claims to have done, I’m not seeing any big yellow or red flags. (Let us know if you see any.)

EOS Aurora battery

The Case For Cheaper, Better Energy Storage

As we’ve reported several times here on CleanTechnica, demand for energy storage is increasing and the market is projected to skyrocket in the years to come. Energy storage will help to integrate more renewable energy into the grid when it matures enough that it is creating excess generation (which already beginning to happen in some regions). But, even beyond that, our grid and vehicle infrastructure have been greatly overbuilt in order to deal with our lack of competitive storage technologies. As old power plants come to a close, it would make sense to refrain from overbuilding and simply build more energy storage capacity… if competitive energy storage technology is on the market.

Regarding the above, here are a few interesting images and stats from Eos:

world energy storage

world energy storage capacity

energy storage market potential

More Info

For a lot more information on the Eos zinc-air batteries — as well as its EV battery and white goods market strategies — check out the full public presentation thar Eos released in February.

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Written By

Zach is tryin' to help society help itself one word at a time. He spends most of his time here on CleanTechnica as its director, chief editor, and CEO. Zach is recognized globally as an electric vehicle, solar energy, and energy storage expert. He has presented about cleantech at conferences in India, the UAE, Ukraine, Poland, Germany, the Netherlands, the USA, Canada, and Curaçao. Zach has long-term investments in Tesla [TSLA], NIO [NIO], Xpeng [XPEV], Ford [F], ChargePoint [CHPT], Amazon [AMZN], Piedmont Lithium [PLL], Lithium Americas [LAC], Albemarle Corporation [ALB], Nouveau Monde Graphite [NMGRF], Talon Metals [TLOFF], Arclight Clean Transition Corp [ACTC], and Starbucks [SBUX]. But he does not offer (explicitly or implicitly) investment advice of any sort.


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