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Korean battery makers counterattack in ESS to sweep high-value North American market

South Korea’s three major battery makers are expanding in energy storage systems (ESS) as Chinese companies increase their share of the global EV battery market. The firms are securing multi-year contracts in North America, focusing on data centre demand, high-output products and full-system deliveries. U.S. rules restricting supply chains supported by certain foreign entities are also helping. Companies are widening chemistry options and increasing output, while brokerages see profitability improving as shipments rise and costs stabilise.