Texas a Testing Ground for Energy Storage

LANCASTER — No one at the equipment lot here would blame you for failing to notice the drab green box sitting across from the spare transformers. But the lithium ions inside that refrigerator-size container are part of a wave of energy storage technology that could help Texas revolutionize its electric grid.

Oncor, the state’s largest transmission company, is installing five of the batteries this summer in South Dallas neighborhoods, providing backup power to schools, traffic lights and a fire station. With the capacity to each store 50 kilowatt-hours of energy — enough to power three to five houses for three hours ...

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