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

Shell is offloading another renewables business. Photo via sprngenergy.com

Reflecting its ongoing de-emphasis of renewable energy, oil and gas giant Shell has agreed to sell its solar and wind power business in India for $1.8 billion.

Aditya Birla Renewables Ltd. (ABRen) is the pending buyer of Solenergi Power Private Ltd., including the Sprng Energy group of companies. Sprng Energy develops, owns and operates utility-scale solar and wind power facilities in India.

Shell, whose U.S. headquarters is in Houston, acquired Solenergi in 2022 for $1.55 billion.

ABRen is Aditya Birla Group’s renewable energy platform. Global Infrastructure Partners, part of asset manager BlackRock, is a strategic investor in ABRen. ABRen develops and operates solar, wind, hybrid and battery storage projects in India.

“This agreement reflects Shell’s continued focus on adjusting the portfolio in our power business,” Machteld de Haan, Shell’s president of downstream, renewables and energy solutions, said in a news release. “We are high-grading our power portfolio and recycling capital in service of our asset-backed trading strategy … This is another step in building a more focused, competitive, and resilient business while improving returns year on year towards 2030.”

Under Wael Sawan, who was named CEO of Shell in 2023, the company has moved away from large-scale, low-yield green energy projects to concentrate on high-margin sectors. Those sectors include natural gas, LNG, deep-water drilling and global energy trading.

The Solenergi deal, expected to close by the end of this year, signals yet another move in Shell’s reassessment of its renewables business. The company has said it will no longer invest in offshore wind projects, but it remains committed to becoming a net-zero emissions business by 2050.

Shell said India remains an important market. In India, Shell offers LNG supply and regasification for downstream users, and also operates Shell Mobility and Shell Lubricants.

The proposed sale of the Indian renewables business continues Shell’s decreasing focus on renewables. In October, Shell exited Atlantic Shores Offshore Wind, a 50-50 joint venture created to offshore wind projects off the coast of New Jersey and New York.

Shell has declared it will not make new investments in offshore wind generation, favoring existing ventures and the expansion of EV charging infrastructure.

The company also announced plans to shut down its Volta C electric vehicle charging business in August 2025.

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