ENGIE Advances Construction of 57 MW Battery System at Chile’s Largest Wind Farm

ENGIE Chile reports 44% construction progress on BESS Kallpa, a 57 MW/285 MWh battery energy storage system integrated with the Kallpa Wind Farm in Taltal, Antofagasta Region. The project represents ENGIE’s first battery installation directly coupled with a wind generation site in Chile. The USD 69 million system comprises 70 battery containers delivering up to five hours of autonomy, equivalent to powering 34,000 homes during that period. Commercial operation is scheduled for the second half of 2026.

The battery system will connect to the substation of Kallpa Wind Farm, which began commercial operation in March 2025 as ENGIE Chile’s largest renewable asset at 344 MW capacity. The integration aims to optimize continuous renewable energy injection into Chile’s National Electric System, addressing intermittency challenges inherent to wind generation. CEO Juan Villavicencio stated the project advances ENGIE’s strategy to combine renewable generation with storage solutions, providing flexibility and resilience to the national grid while supporting energy transition goals in Antofagasta, a strategic region for Chile’s mining sector.

BESS Kallpa forms part of an expanding storage portfolio under construction across Chile. ENGIE is building BESS Arica at 30 MW, BESS Tocopilla at 116 MW awaiting commercial entry, BESS Lile at 140 MW, BESS Los Loros at 46 MW, and the hybrid PV + BESS Libélula project combining 151 MWp solar with 199 MW storage. ENGIE currently operates 267 MW of installed battery storage capacity in Chile, positioning the company as a leading storage operator in the country’s grid.

The battery deployment aligns with ENGIE’s global approach to hybrid renewable-storage projects, leveraging international experience to enhance grid stability. Chile’s mining-dominated northern regions present particular opportunities for storage systems that can firm renewable supply for industrial loads. The five-hour duration of BESS Kallpa exceeds typical grid-balancing requirements, suggesting potential participation in capacity markets or industrial offtake agreements. The Antofagasta location places the system near major copper mining operations requiring reliable power supply as mine electrification accelerates. ENGIE’s pipeline indicates continued focus on pairing battery systems with renewable generation sites rather than standalone storage, reflecting confidence in co-located project economics and operational synergies.