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Greentown welcomes new Houston members, Phillips 66's renewable energy facility milestone, and more top news

Here's what Houston energy transition news trended this week. Photo via Getty Images

Editor's note: From Greentown Houston announcing its newest members to new Houston-area sustainability-focused plants, these are the top headlines that resonated with EnergyCapital readers on social media and daily newsletter this week.

Greentown Labs shares updates on newest climatetech members

Nine companies have joined Greentown Houston. Photo via Getty Images

Greentown Labs announced that it added nine climatetech startups in the second quarter of this year.

The new members of the incubator, which is co-located in Houston and Boston, work in a variety of fields from electricity to manufacturing and agriculture. Continue reading.

Phillips 66 reports full capacity milestone of renewable energy facility

The Rodeo Renewable Energy Complex will expand commercial-scale production to “position the company as a leader in renewable fuels." Photo via phillips66.com

Houston-based Phillips 66 announced the full conversion of a California renewable energy facility.

The Rodeo Renewable Energy Complex will expand commercial-scale production to “position the company as a leader in renewable fuels,” according to a news release. Continue reading.

First-of-its-kind, DOE-backed plant coming to Houston area

Houston power company Calpine announced plans to build the Baytown Carbon Capture and Storage Project, a carbon capture demonstration facility that aims to capture carbon dioxide from the Baytown Energy Center. Photo via DOE

The first full-scale implementation of carbon capture and storage technology at a natural gas combined cycle power plant in the U.S. is coming to Baytown.

Houston power company Calpine announced plans to build the Baytown Carbon Capture and Storage Project (Baytown CCS Project), which is a carbon capture demonstration facility that aims to capture carbon dioxide from the Baytown Energy Center (BEC). The BEC is a natural gas combined-cycle power plant in Baytown. Continue reading.

Houston entrepreneur launches new venture to shine light on sustainability

Solar Slice Founder Nathan Childress says his new venture offers a fulfilling way to encourage and promote solar energy and a greener planet. Photo by Pixabay

A Houston nuclear engineer and entrepreneur wants consumers to capture their own ray of sunlight to brighten the prospect of making clean energy a bigger part of the power grid.

Solar Slice Founder Nathan Childress says his new venture offers a fulfilling way to encourage and promote solar energy and a greener planet. An experienced entrepreneur, Childress also serves as founder and CEO of technology software company Macorva.

Although trained in nuclear power plant design, solar power drew his interest as a cheaper and more accessible alternative, and Childress tells InnovationMap that he thinks that the transition to cleaner energy, in Texas especially, needs to step up. Continue reading.

Houston geothermal company picks up power purchase agreement in California

Under two 15-year deals, Southern California Edison has agreed to buy a total of 320 megawatts of geothermal power from Fervo Energy. Photo via Getty Images

Houston-based Fervo Energy, a provider of geothermal power, has signed up one of the country’s largest utilities as a new customer.

Under two 15-year deals, Southern California Edison has agreed to buy a total of 320 megawatts of geothermal power from Fervo. Financial terms weren’t disclosed. The power will be enough to deliver electricity to the equivalent of 350,000 homes.

Southern California Edison, based in Rosemead, California, serves about 15 million people throughout a 50,000-square-mile area in California. Continue reading.

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A View From HETI

Amperon, Hertha Metals and Vaulted Deep were named to this year's Global Cleantech 100 list. Photo via Getty Images

Three Houston-area companies—Amperon, Hertha Metals and Vaulted Deep—appear on this year’s Global Cleantech 100 list.

The unranked list, generated by market intelligence and advisory firm Cleantech Group, identifies the 100 privately held companies around the world that are most likely to make a significant impact in the cleantech market over the next five to 10 years.

For the 2026 list, Cleantech Group received more than 24,000 Global Cleantech 100 nominations from nearly 60 countries. Cleantech Group scored those companies and narrowed the contenders to 264. An expert panel reviewed those nominees, and the list was whittled down to the 100 winners.

Here’s a rundown of the three Houston-area honorees:

Amperon

Founded in 2018 by Sean Kelly and Abe Stanway, Houston-based Amperon offers an AI-enabled energy forecasting and analytics platform designed to help stabilize electric grids. Amperon received undisclosed amounts of venture capital from National Grid Partners and Tokyo Gas Co. Ltd. last year and announced a recent investment from Samsung Ventures earlier this month.

Hertha Metals

Founded in 2022 by Laureen Meroueh, Conroe-based Hertha Metals provides a single-step process for producing sustainable steel. Last year, the company emerged from stealth mode and raised more than $17 million in venture capital.

Vaulted Deep

Vaulted Deep’s technology injects excess organic waste underground to remove carbon dioxide from the atmosphere. Julia Reichelstein and Omar Abou-Sayed founded the Houston-based company in 2023. Last year, the startup raised $32.3 million in venture capital. Also in 2025, Vaulted Deep signed a 12-year deal with software giant Microsoft to remove up to 4.9 million metric tons of carbon dioxide from the environment.

Vaulted Deep also made the list last year, along with Houston-based Syzygy Plasmonics and Fervo Energy. Fervo was also named the 2025 North American Company of the Year by Cleantech Group.

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