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Thermal batteries could transform renewable energy storage and provide a cheaper and scalable alternative to lithium-ion technology.

“Intermittent wind and solar power are becoming the cheapest forms of energy that humans have ever known, and all kinds of energy storage is now being used to harness that, to drive transportation, to drive the electricity grid,” said John O’Donnell, the founder and chief innovation officer of Rondo Energy. “Heat batteries are a fundamentally new way of storing energy at a small fraction of the cost.” 

Heat batteries store excess electricity as heat in materials like bricks or graphite, which can reach temperatures over 3,000 degrees Fahrenheit. The stored heat can then be released when needed, making thermal batteries ideal for powering the manufacturing of steel, cement and chemicals

“What a thermal battery does is allow you to soak up clean, inexpensive electrons from wind and solar, store them as heat and deliver that energy later to an industrial customer,” said Justin Briggs, COO of Antora Energy.

Rondo Energy is one of the leaders in this space. The company built its first commercial heat battery in California’s Central Valley at Calgren Renewable Fuels.

The system stores solar energy during the day and delivers high-temperature heat 24/7.

“We use unrefined raw materials, like bricks made from clay,” O’Donnell said. “A pound of brick stores more energy than a pound of lithium-ion battery, at less than 10% of the cost.”

By 2027, Rondo Energy plans to expand production to 90 gigawatt-hours annually, a scale that could cut 12 million tons of carbon dioxide emissions per year. That’s the equivalent of taking 4 million gas cars off the road, according to the company.

Despite their promise, thermal batteries face hurdles, including high upfront investment and a lack of familiarity among industrial users.

“The biggest hurdle is educating the market that this technology is available,” O’Donnell said.

Watch the video to learn more about this innovative technology.

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Troubling times for Tesla, Nissan, and Dodge – plus some fun yellow stuff!

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Troubling times for Tesla, Nissan, and Dodge – plus some fun yellow stuff!

Tesla’s Q2 results are in, and they are way, way down from Q2 of 2024. At the same time, Nissan seems to be in serious trouble and the first-ever all-electric Dodge muscle car is getting recalled because its dumb engine noises are the wrong kind of dumb engine noises. All this and more on today’s deeply troubled episode of Quick Charge!

We’ve also got an awesome article from Micah Toll about a hitherto unexplored genre of electric lawn equipment, a $440 million mining equipment deal, and a list of incompetent, corrupt, and stupid politicians who voted away their constituents’ futures to line their pockets.

Prefer listening to your podcasts? Audio-only versions of Quick Charge are now available on Apple PodcastsSpotifyTuneIn, and our RSS feed for Overcast and other podcast players.

New episodes of Quick Charge are recorded, usually, Monday through Thursday (and sometimes Sunday). We’ll be posting bonus audio content from time to time as well, so be sure to follow and subscribe so you don’t miss a minute of Electrek’s high-voltage daily news.

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Drop us a line at tips@electrek.co. You can also rate us on Apple Podcasts and Spotify, or recommend us in Overcast to help more people discover the show.


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Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisors to help you every step of the way. Get started here.

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OpenAI says Robinhood’s tokens aren’t equity in the company

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OpenAI says Robinhood's tokens aren't equity in the company

Jaque Silva | Nurphoto | Getty Images

OpenAI is distancing itself from Robinhood‘s latest crypto push after the trading platform began offering tokenized shares of OpenAI and SpaceX to users in Europe.

“These ‘OpenAI tokens’ are not OpenAI equity,” OpenAI wrote on X. “We did not partner with Robinhood, were not involved in this, and do not endorse it.”

The company said that “any transfer of OpenAI equity requires our approval — we did not approve any transfer,” and warned users to “please be careful.”

Robinhood announced the launch Monday from Cannes, France, as part of a broader product showcase focused on tokenized equities, staking, and a new blockchain infrastructure play. The company’s stock surged above $100 to hit a new all-time high following the news.

“These tokens give retail investors indirect exposure to private markets, opening up access, and are enabled by Robinhood’s ownership stake in a special purpose vehicle,” a Robinhood spokesperson said in response to the OpenAI post.

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Robinhood offered 5 euros worth of OpenAI and SpaceX tokens to eligible EU users who signed up to trade stock tokens by July 7. The assets are issued under the EU’s looser investor restrictions via Robinhood’s crypto platform.

“This is about expanding access,” said Johann Kerbrat, Robinhood’s SVP and GM of crypto. “The goal with tokenization is to let anyone participate in this economy.”

The episode highlights the dynamic between crypto platforms seeking to democratize access to financial products and the companies whose names and equity are being represented on-chain

U.S. users cannot access these tokens due to regulatory restrictions.

Robinhood hits record high as OpenAI, SpaceX go on-chain

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BYD launches new discounts, offering +50% off smart driving tech

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BYD launches new discounts, offering +50% off smart driving tech

Despite the warnings, BYD continues introducing new discounts. On Wednesday, BYD’s luxury off-road brand began offering over 50% Huawei’s smart driving tech.

BYD introduces new discounts on smart driving tech

After BYD cut prices again in May, the China Automobile Manufacturers Association (CAMA) warned that the ultra-low prices are “triggering a new round of price war panic.”

Although they didn’t single out BYD, it was pretty obvious. BYD slashed prices across 22 of its vehicles by up to 34%, triggering several automakers to follow suit in China.

BYD’s cheapest EV, the Seagull, typically starts at about $10,000 (66,800 yuan). After the price cuts, the Seagull is listed at under $8,000 (55,800 yuan).

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It doesn’t look like China’s EV leader plans to slow down anytime soon. Fang Cheng Bao, BYD’s luxury off-road brand, introduced new discounts on Huawei’s smart driving tech on Wednesday.

The limited-time offer cuts the price of Huawei’s Qiankun Intelligent Driving High-end Function Package to just 12,000 yuan ($1,700).

BYD-new-discounts
BYD Fang Cheng Bao 5 SUV testing (Source: Fang Cheng Bao)

Buyers who order the smart driving tech in July will save over 50% compared to its typical price of 32,000 yuan ($4,500).

Earlier this year, Fang Chang Bao launched the Tai 3, its most affordable vehicle, starting at 139,800 yuan ($19,300). The Tai 3 is about the size of the Tesla Model Y, but costs about half as much.

BYD-Tai-3-electric-SUV
BYD Fang Cheng Bao Tai 3 electric SUV (Source: Fang Cheng Bao)

The Tai 3 will spearhead a new sub-brand of electric SUVs following the more premium Bao 8 and Bao 5 hybrid SUVs.

BYD’s luxury off-road brand sold 18,903 vehicles last month, up 50% from May and 605% compared to last year. Fang Cheng Bao has now sold over 10,000 vehicles for three consecutive months.

The Chinese EV giant sold 382,585 vehicles in total in June, an increase of 12% from last year. In the first half of the year, BYD’s cumulative sales reached over 2.1 million, a YOY increase of 33%.

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