Arroyo Battery Storage Cantwell is a significant energy storage project located in Harlingen, Texas, within the ERCOT power control area. Operated and owned by BT Cantwell Solar, this facility is designed to have a capacity of 180 megawatts (MW) and utilizes advanced battery technology for energy storage. The project is classified as unregulated under U.S. regulatory standards, allowing for flexible operational strategies. Expected to come online in 2026, Arroyo Battery Storage Cantwell represents a strategic investment in renewable energy infrastructure, contributing to the reliability and efficiency of the energy grid.