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Q&A

Eric Dresselhuys, CEO of ESS, Makes the Case for Iron-Flow Batteries

An interview about the politics of energy storage — and whether different technologies can help

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Eric Dresselhuys
Heatmap Illustration

While in Anaheim for RE+ last week, I met with Eric Dresselhuys, CEO of long duration iron-flow battery storage manufacturer ESS Inc. We chatted about battery fires, community buy-in, and the future of China policy. I came in expecting optimism and left feeling we need a lot more conversations like this one.

The following is an abridged version of our conversation that has been edited for clarity.

How does your product address the opinion that battery storage has a buy-in problem?

It’s not so much an opinion as just reporting the obvious, which is that lithium-ion batteries on the grid have a buy-in problem. Maybe if you’re in rural western Australia nobody cares because there are no human beings around, but if you look at the need for energy storage to facilitate the energy transition, it’s pretty clear we have to put batteries all over the place and specifically close to where human beings live. And that’s a problem.

Can iron-flow help solve that problem? I think unequivocally we can. It’s a very different architecture. It’s a battery that’s really designed from the beginning to operate as a grid backup battery. If you go back to look at lithium, it was never designed to go onto the grid. It was designed to go into camcorders, phones. This is not the technology I think anybody would’ve picked for the grid if they had started from scratch.

Are you seeing any change in demand for your product from protests over lithium battery projects?

I think it’s the old gag of all politics are local. The politics of siting is a local problem. What’s simultaneously true is adoption of storage on the grid is growing at a phenomenally high rate. And yet there are stories [about opposition] all over the place. There was just one up in Marin County, California, where the community said it’s in an area adjacent to wetlands. And they said you know what? We’re just not going to put a–

But are these communities opposed to lithium storage actually choosing iron-flow over these projects, or are they just saying no to any development?

Right now, they’re just saying no. The communities are not going to solve the problem. They’re going to tell you what is unacceptable and it’s going to be somebody else’s job to solve the problem.

I’ll use Schiphol Airport in Amsterdam [as an example]. They said, we have thousands of gallons of jet fuel laying around. And people. And airplanes. We can’t put a lithium battery out here. So they’re using an iron-flow and sought out a non-lithium battery to solve their energy storage problems because it was safer.

China policy looms large over the future of U.S. battery supplies. What do you think the final endgame will be of our approach to China’s dominance in this business segment?

It’s a great question that I don’t think I know the answer to. I think the next step is to try and get the playing field somewhat level. The amount of subsidy that goes into renewables in general and batteries in particular in China is daunting. People talk about the IRA and all these things as if it’s a lot of money, but it’s a pittance compared to what China is putting in.

Getting the playing field a little more level in the short term through a combination of incentives here and tariffs coming on will be a next step. Until we get carbon accounting — cradle-to-grave carbon accounting — it’ll be hard to get things totally level because in the U.S. we enforce environmental laws and we don’t employ prison labor to build [these] things. Until we get that full ESG accounting, I think there’s going to be some limitation.

Okay one fun question – what was the last song you listened to? Keeping ‘em honest here at Heatmap News.

“Impossible Germany” by Wilco.

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Hotspots

Meta Data Center Federal Pipeline Review Due Early Next Year

And more of the week’s top fights around development.

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The United States.
Heatmap Illustration/Getty Images

1. Richland Parish, Louisiana – Gird your loins for the coming fight over the Meta Hyperion data center’s gas pipeline.

  • On Wednesday, the Federal Energy Regulatory Commission laid out plans for an environmental assessment of the Entergy pipeline for the Meta data center under the National Environmental Policy Act and stated it’ll be issued in early January 2027. Federal agencies have been ordered by the panel to complete any remaining decisions on authorizations by April.
  • The decision to do an environmental assessment under NEPA will be controversial. The Sierra Club filed comments to FERC stating they wanted an environmental impact statement instead that took into account the environmental impacts of the data center being fed by the pipeline, as well as a review of the project’s cumulative impacts, as the activist group said they’re explicitly linked to the data center’s operations. “The power stations and data center are not remote or speculative developments unrelated to the proposed action,” their comments read.
  • This is quite similar to what’s playing out with the Green Chile pipeline in New Mexico for Oracle and OpenAI’s Project Jupiter, which we recently explained could turn into litigation with high stakes for future gas pipelines linked to data centers. But to me, this conflict with Meta feels like it has more at stake for this individual project, as it’s playing out while construction on gas power plants for the data center has been underway for almost a year after earlier being blessed by state regulators.
  • I asked Sierra Club what could happen next. Eric Huber, one of their managing attorneys, told me on Thursday, “I heard the EA is expected in January, but we are in wait and see mode and will decide on further steps when it comes out.” Meta and Entergy did not respond to a request for comment.

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Plus

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Talking with Kevin Gundersen, the head of public affairs for Digital Realty.

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Kevin Gundersen
Heatmap Illustration

This week’s conversation is with Kevin Gundersen, head of public affairs for data center developer Digital Realty. On Wednesday, Digital Realty released a fascinating poll as part of Infrastructure for America, a pro-data center organization that also includes Compass, Vantage Data Centers, and QTS. The poll pushed back on the idea that we’re currently in the middle of a “data center election”; instead, it found most voters are not expected to choose their national elected officials based on a politician’s stance on data centers.

I reached out to folks involved in the poll's release, and they put me in touch with Gundersen, whom I’ve met before and consider to be a straight shooter. He accepted my invitation to do a candid hot-seat chat about the findings, his thoughts on all the data center attack ads, and whether his industry’s actually recovering any ground with the American people.

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Only upgrades for pre-existing wind projects have been approved.

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Donald Trump.
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In September, the Trump administration told a reporter that the president directed the Pentagon to finally process wind projects through routine airspace approvals as required under a court order. By doing this, it created the appearance of real headway and good faith in talks with Democrats in Congress on energy permitting legislation before the November midterm elections.

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