Sign In or Create an Account.

By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy

Sparks

The Coolest Thing in Climate Tech Just Got More Buyers

Rondo Energy is taking its hot rock batteries on the road.

A Rondo heat battery.
Heatmap Illustration/Rondo

Rondo Energy, a Silicon Valley startup building “heat batteries” to replace fossil fuels in heavy industries, announced three new customers on Wednesday. In just a few months' time, the company has gone from serving a single industry — ethanol — at its pilot plant in California, to making deals around the globe that demonstrate the technology’s potential versatility.

With grant funding from Breakthrough Energy Catalyst, as well as the European Investment Bank, the company will install three commercial-scale batteries at factories in Denmark, Germany, and Portugal. Each one will prove Rondo's compatibility with a different industry: In Denmark, the battery will be used to produce low-carbon biogas. In Germany, it will power a Covestro chemical plant that produces polymers. In Portugal, it will power a to-be-announced food and beverage factory.

Rondo warms up literal tons of bricks to more than 1,000 degrees Celsius (more than 1,800 degrees Fahrenheit) using electric heaters powered by renewable energy. The bricks can retain the heat for up to 18 hours, my colleague Katie Brigham reported earlier this year. When the heat is needed, air flows through the system and releases energy as either hot air or steam. At the site in Denmark, for instance, the battery will generate high pressure steam to drive a turbine generator, delivering steady heat and power to the plant. Rondo sells the energy as a service, retaining ownership and control of the equipment.

The projects announced Wednesday follow a series of recent deals across a diverse list of industries: a cement plant in Thailand, a plastic recycling plant in Texas, and even whiskey — Diageo will use the tech to electrify its Bulleit Bourbon plant in Kentucky. The fast fashion giant H&M is exploring use of the tech, and the company has also announced partnerships with the renewable energy developer EDP as well as Saudi Aramco.

As Katie noted in her piece, there are a lot of technologies competing to solve the challenge of producing industrial-grade heat. Carbon capture and storage equipment can be added to existing fossil fuel boilers, or natural gas and coal can be replaced with clean hydrogen fuel. There are also industrial heat pumps that can produce lower-temperature heat. But all of these solutions have the same challenge — overcoming the “green premium” compared with the fossil fuel boilers and furnaces used today.

Just because Rondo has made inroads in some industries, doesn’t mean all its potential customers are ready or able to fork over that green premium today. That’s why, in addition to being an investor in Rondo, Breakthrough Energy Catalyst decided to provide grant funding to these three new deployments, said Mario Fernandez, the head of the Catalyst program. The hope is these projects will help bring down the cost and catalyze greater adoption.

Green

You’re out of free articles.

Subscribe today to experience Heatmap’s expert analysis 
of climate change, clean energy, and sustainability.
To continue reading
Create a free account or sign in to unlock more free articles.
or
Please enter an email address
By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy
Sparks

Trump Uses ‘National Security’ To Freeze Offshore Wind Work

The administration has already lost once in court wielding the same argument against Revolution Wind.

Donald Trump on a wind turbine.
Heatmap Illustration/Getty Images

The Trump administration says it has halted all construction on offshore wind projects, citing “national security concerns.”

Interior Secretary Doug Burgum announced the move Monday morning on X: “Due to national security concerns identified by @DeptofWar, @Interior is PAUSING leases for 5 expensive, unreliable, heavily subsidized offshore wind farms!”

Keep reading...Show less
Blue
Sparks

The House Just Passed Permitting Reform. Now Comes the Hard Part.

The SPEED Act faces near-certain opposition in the Senate.

The Capitol and power lines.
Heatmap Illustration/Getty Images

The House of Representatives has approved the SPEED Act, a bill that would bring sweeping changes to the nation’s environmental review process. It passed Thursday afternoon on a bipartisan vote of 221 to 196, with 11 Democrats in favor and just one Republican, Brian Fitzpatrick of Pennsylvania, against.

Thursday’s vote followed a late change to the bill on Wednesday that would safeguard the Trump administration’s recent actions to pull already-approved permits from offshore wind farms and other renewable energy projects.

Keep reading...Show less
Sparks

AI’s Stumbles Are Tripping Up Energy Stocks

The market is reeling from a trio of worrisome data center announcements.

Natural gas.
Heatmap Illustration/Getty Images

The AI industry coughed and the power industry is getting a cold.

The S&P 500 hit a record high on Thursday afternoon, but in the cold light of Friday, several artificial intelligence-related companies are feeling a chill. A trio of stories in the data center and semiconductor industry revealed dented market optimism, driving the tech-heavy NASDAQ 100 down almost 2% in Friday afternoon trading, and several energy-related stocks are down even more.

Keep reading...Show less