major milestone

Houston geothermal startup selects Texas location for first energy storage facility

Houston startup Sage Geosystems has tapped a utility provider for an energy storage facility in the San Antonio metro area. Photo via sagegeosystems.com

Houston-based geothermal energy startup Sage Geosystems has teamed up with a utility provider for an energy storage facility in the San Antonio metro area.

The three-megawatt EarthStore facility will be on land controlled by the San Miguel Electric Cooperative, which produces electricity for customers in 47 South Texas counties. The facility will be located in the town of Christine, near the cooperative’s coal-fired power plant.

Sage says its energy storage system will be paired with solar energy to supply power for the grid operated by the Electric Reliability Council of Texas (ERCOT). The facility is set to open later this year.

“Once operational, our EarthStore facility in Christine will be the first geothermal energy storage system to store potential energy deep in the earth and supply electrons to a power grid,” Cindy Taff, CEO of Sage Geosystems, says in a news release.

The facility is being designed to store geothermal energy during six- to 10-hour periods.

“Long-duration energy storage is crucial for the ERCOT utility grid, especially with the increasing integration of intermittent wind and solar power generation,” says Craig Courter, CEO of the San Miguel Electric Cooperative.

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A View From HETI

Freedom CNG, a distributor of compressed renewable natural gas, has closed three acquisitions in recent months. Photo courtesy Freedom CNG.

Houston-based Freedom CNG, a provider and distributor of compressed renewable natural gas, has acquired ComTech Energy, a Canada-based provider of on-site mobile refueling for compressed renewable natural gas. The purchase price wasn’t disclosed.

The acquisition allows Freedom CNG to adopt a hub-and-spoke operational model, allowing customers to move away from fixed fueling infrastructure with low-carbon energy solutions across North America, according to a news release.

In conjunction with the deal, ComTech President James Ro has joined Freedom CNG as chief commercial and strategy officer.

“As we expand our footprint in low‑carbon fuel solutions, acquiring ComTech Energy marks an important step in enhancing our ability to deliver efficient, innovative fueling infrastructure,” Nick Kurtenbach, president and chief financial officer of Freedom CNG, said in the release. The acquisition, he added, “allows us to offer a more comprehensive suite of solutions that support the transition to cleaner energy and meet the evolving needs of our customers.”

Freedom CNG’s North American footprint now spans more than 25 fueling stations for compressed renewable natural gas and over 60 operations and maintenance sites across the U.S. and Canada.

This is the third acquisition for Freedom CNG in the last two months. It also recently acquired Colorado-based X3 CNG and Utah-based Lancer Energy, according to a representative from Freedom CNG, this summer. The company services regional trucks, buses and service vehicles, as well as heavy construction, agriculture, data centers and other sectors.

Last year, funds affiliated with alternative asset manager Apollo bought a majority stake in Freedom CNG, which was founded in 2012. The value of the deal wasn’t disclosed.

“Freedom has developed a strong portfolio of [renewable natural gas] fueling stations with meaningful growth potential driven by established relationships with blue-chip customers and attractive new development opportunities,” Apollo partner Scott Browning said in 2024.

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