The Energy Secretariat of the Ministry of Economy of the Nation of Argentina has announced a national and international call for proposals to deploy battery energy storage systems (BESS) projects at critical nodes across Argentina. The programme aims to reduce electricity outages and improve system performance during periods of peak demand, strengthening the reliability of the Argentine Interconnection System.
The current phase targets the installation of 700 MW of BESS capacity with an estimated investment of $700 million. The initiative will be implemented through the Compañía Administradora del Mercado Mayorista Eléctrico (CAMMESA), which will oversee the bidding and implementation process. The programme builds on the earlier Greater Buenos Aires storage project (ALMA-GBA), which reportedly represented Argentina’s first large-scale energy storage initiative.
In September 2025, the Argentine government announced the results of the ALMA-GBA tender for BESS projects in the AMBA region. A total capacity of 713 MW has been awarded, exceeding the initial target of 500 MW. A total of 15 companies submitted 27 projects amounting to a capacity of 1,347 MW. The awarded project will sign contracts with distributors Edenor and Edesur, with CAMMESA acting as the final payment guarantor.
