Concentrating Solar Startup Heliogen Raises $108 Million In Two Funding Rounds
Renewable energy technology company Heliogen has raised $108 million in funding across two rounds — a first round that raised $25 million, followed by $83 million in what was described as an oversubscribed round. The new tranche of investors included steel and mining company ArcelorMittal, venture capital firm Prime Movers Lab, Canadian venture capital fund Ocgrow Ventures, Edison International, A.T. Gekko and more.
Heliogen has made headlines in the past for two main reasons. The first reason is that the company has Bill Gates as an early and vocal investor. The second, and arguably much more important reason, is that Heliogen has developed an innovative new method for capturing and converting sunlight into an ultra-high temperature heat that can exceed 1,000° Celsius. Named the Sunlight Refinery, it consists of an array of mirrors, controlled using advanced computer vision software, that are used to reflect sunlight to a single target with extreme accuracy. We gave a detailed rundown of Heliogen’s technology back in 2019, including highlighting its drawbacks.
The extremely high temperatures generated by the Sunlight Refinery system were previously only possible by using fossil fuel-powered tech. This means that industrial processes that require these high temperatures, such as mining and cement and steel production, can now effectively be carried out in a carbon neutral way. Given how large the carbon footprint currently is for cement production and for the mining industry, any technology that can help it to operate in a carbon neutral manner is a boon.
In a sign that the mining industry is keen to adopt the tech, mining giant Rio Tinto announced in March 2021 that it has established a Memorandum of Understanding with Heliogen. The memorandum details the terms under which Heliogen will deploy its technology at Rio Tinto’s borates mine in Boron, California. This pilot scheme will see Rio Tinto use Heliogen’s tech to power the mine’s industrial processes and greatly reduce the carbon emissions at the site.
The financing raised by the round will be used to accelerate the global deployment of the Sunlight Arrays and to keep making improvements to the systems efficiency. It will also be used for other pilot schemes like the one being conducted with Rio Tinto.
In a statement, Heliogen CEO and founder Bill Gross said: “This infusion of new support for Heliogen comes at a time when the paradigm shift toward clean energy is even further accelerated by the new realities the world is facing. We’re being granted the resources to do more projects that address the most carbon-intensive human activities and work toward our goals of lowering the price and emissions of energy for everyone on the planet. We thank all of our investors for enabling us to pursue our mission and offer the world technology that will allow it to achieve a post-carbon economy.”
Electricity demand is surging in Texas, and solar, wind, and battery storage are meeting it.
According to new data from the US Energy Information Administration (EIA), electricity demand across the Texas grid managed by the Electric Reliability Council of Texas (ERCOT) hit record highs in the first nine months of 2025. ERCOT, which supplies power to about 90% of the state, saw demand jump 5% year-over-year to 372 terawatt hours (TWh) – a 23% increase since 2021. No other major US grid has grown faster over the past year.
Solar and wind keep ERCOT’s grid steady
The biggest growth story in Texas power generation is solar. Utility-scale solar plants produced 45 TWh from January through September, up 50% from 2024 and nearly four times what they generated in 2021 (11 TWh). Wind power also continued to climb, producing 87 TWh through September – a 4% increase from last year and 36% more than in 2021.
Together, wind and solar supplied 36% of ERCOT’s total electricity over those nine months. Solar, in particular, has transformed Texas’s daytime energy mix. From June to September, ERCOT solar farms generated an average of 24 gigawatts (GW) between noon and 1 pm – double the midday output from 2023. That growth has pushed down natural gas use at midday from 50% of the mix in 2023 to 37% this year.
Battery storage is filling in the gaps
Batteries charge during the day when wind and solar generation are the highest, and they produce electricity when generation from wind and solar slows down. ERCOT began reporting battery output separately in October 2024 in its hourly grid data, and it’s clear that batteries are now helping to smooth out evening peaks. This past summer, batteries supplied an average of 4 GW of power around 8 pm, right as solar production dropped off.
Natural gas is flatlining
Natural gas is still Texas’s dominant power source, but it isn’t growing like it used to. Between January and September, gas-fired plants generated 158 TWh of electricity, compared to 161 TWh in 2023. Gas comprised 43% of ERCOT’s generation mix during the first nine months of 2025, down from 47% in the first nine months of 2023 and 2024.
More demand growth ahead
The EIA expects Texas electricity demand to keep rising faster than any other grid in the US. In its latest Short-Term Energy Outlook, the EIA projects ERCOT’s demand will climb another 14% in the first nine months of 2026, reaching 425 TWh. That means Texas will need even more solar, wind, and battery storage to keep up with its breakneck growth.
Read more: This $900 million solar farm in Texas is going 100% to data centers
The 30% federal solar tax credit is ending this year. If you’ve ever considered going solar, now’s the time to act. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. It has hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use, and you won’t get sales calls until you select an installer and share your phone number with them.
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GM is recalling nearly 23,000 Chevy Equinox EV and Cadillac Optiq models due to a defect where the tire tread could fall off.
GM is recalling more Chevy Equinox EV models
In a letter sent to the National Highway Traffic Safety Administration (NHTSA), GM said it has decided to issue a safety recall for certain Chevy Equinox EV and Cadillac Optiq models from model years 2025 to 2026.
This time, it isn’t necessarily GM’s fault. The vehicles may be equipped with 21″ all-season tires that Continental Tire is recalling.
According to Continental, the tires were produced during the week of October 6, 2024, and may have a defect where the tire tread could partially or fully detach. The records show the defect is due to a nonconforming tread base rubber compound.
Owners of affected vehicles may notice unusual tread wear or bulging, vibration while driving, or tire noises. GM is unaware of any incidents related to the defect, but is issuing the recall out of an abundance of caution.
On September 18, 2025, GM inspected the assembly plant and confirmed there were no suspect tires in stock. The 21″ tires come standard on RS trims and are optional on LT1 and LT2 grades.
Although GM is recalling 22,914 Chevy Equinox EVs and Cadillac Optiqs, it estimates that only about 1% of them have the defect.
The recall includes:
- 2026 Cadillac Optiq: 214
- 2026 Chevy Equinox EV: 1,832
- 2025 Cadillac Optiq: 3,468
- 2025 Chevy Equinox EV: 17,400
GM dealers will check all four tires and replace them if needed, free of charge. Dealers were notified on October 16. Owner notification letters are expected to be mailed out on December 1, 2025.
You can contact Chevrolet’s customer service number at 1-800-222-1020 or Cadillac’s at 1-800-333-4223. GM’s recall number is N252525030. Owners can also call the NHTSA hotline at 1-888-327-4236 or visit the nhtsa.gov website for more information.
The Chevy Equinox EV is now the third best-selling EV in the US, trailing only the Tesla Model Y and Model 3. Meanwhile, Cadillac’s entry-level Optiq SUV is the fifth-most-popular luxury EV. The recall is minor and only affects a small percentage of models, so it’s not expected to have a major impact.
If you want to test one of them for yourself, we can help you get started. Check out our links below to find available Chevy Equinox EV and Cadillac Optiq models near you.
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In the Electrek Podcast, we discuss the most popular news in the world of sustainable transport and energy. In this week’s episode, we discuss Tesla’s earnings madness, Rivian layoffs, Ford pausing F-150 Lightning, and more.
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After the show ends at around 5 p.m. ET, the video will be archived on YouTube and the audio on all your favorite podcast apps:
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