Hoping to help grid operators adapt to changes buffeting the power markets, TotalEnergies is assembling a portfolio of battery farms and natural-gas-fired power plants.

Above the air-cooled condensers at the TotalEnergies power plant in Toul, France. Credit...Desiré van den Berg for The New York Times

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By Stanley Reed

Stanley Reed visited a gas-fired power plant in Toul, France, and a battery farm in Dunkirk, France, to report this article.