With Texas renewable power generation growing, energy secretary says storage is next challenge
The Vistra Zero facility, lower left, at the Moss Landing Power Plant in California is the largest energy storage system of its kind in the world, able to store up to 300Mw of power. It uses lithium-ion batteries to capture excess electricity from the grid and release it when needed later, typically during solar and wind down times.Expanding America’s ability to store energy is the key toavailable any time — even when there’s no wind or sun — U.S.
Increasing storage capacity could, for example, allow operators to store solar energy produced midday in batteries and send that power to the grid when demand is highest, typically in the evening.To make that a reality, the Department of Energy’s $1 billion “earthshot” initiative is aiming to cut the cost of long-duration storage of greater than 10 hours by 90 percent this decade.
In a San Antonio pilot project, CPS Energy is preparing to sign a contract for a 50 megawatt battery storage system and another to purchase 900 megawatts of solar power. CPS’ interim CEO has called the project a “sizable pilot.” “Storage is essential to help move renewables forward,” Benny Ethridge, CPS’ vice president in charge of power generation, said after the utility’s board meeting last month. “I think we need longer duration storage to really move the needle.”
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