CATL has signed an agreement with Copenhagen Infrastructure Partners (CIP) to supply a 313 MW/1,639.45 MWh BESS to the La Alegría Solar project, which the Danish investment manager is developing in the Mexican state of Campeche.
The configuration provides about 5.24 hours of storage at nominal power. According to CATL, La Alegría will be Mexico’s first BESS with more than 1 GWh of energy capacity and the country’s largest battery storage system to date.
The announcement represents a substantial change from the project’s previously disclosed configuration. In March, Mexico’s Secretariat of Environment and Natural Resources (Semarnat) approved La Alegría Solar’s regional Environmental Impact Statement (MIA-R) with a 788.719 MWp solar plant and a 177.69 MW / 314.98 MWh BESS. The plant has a declared net installed capacity of 600 MW and 694.274 MWac of inverter capacity.
The environmental design includes 1,151,416 solar modules rated at 685 Wp, 101 transformer stations and 202 inverters. The grid connection infrastructure includes a 34.5/400 kV step-up substation and a 2.85 km, 400 kV transmission line. The project covers 1,206.97 hectares and was submitted to Semarnat by Sunstone Power 2.
The 1,639.45 MWh energy capacity now announced by CATL is approximately 5.2 times the 314.98 MWh included in the approved environmental documentation. The BESS power capacity also increases from 177.69 MW to 313 MW under the new configuration.
Other configurations have also been disclosed during the project’s development. In April, CFE Calificados announced electricity hedging contracts with CIP, associated with Sunstone Power, for La Alegría Solar and La Esperanza Solar. At the time, La Alegría was presented as a 600 MW solar project with 300 MW of storage. The two projects together totaled 900 MW of solar capacity and 450 MW of storage and form part of the binding planning of Mexico’s Secretariat of Energy (Sener).
CIP subsequently confirmed that La Alegría and La Esperanza are its first projects in Mexico and that both hybrid solar and battery developments were advancing toward final investment decisions. In August, the investment manager announced the close of its Growth Markets Fund II (GMF II), with commitments of approximately $3 billion, and said it had started construction of its first large-scale solar-plus-storage projects in Mexico.
The Campeche government has put the combined planned investment for La Alegría and La Esperanza at $845 million, based on the 900 MW of solar and 450 MW of storage disclosed at the time. It also estimates about 1,800 construction jobs and electricity production equivalent to the consumption of more than 600,000 homes.
For La Alegría, CATL will supply its TENER platform. The manufacturer introduced the technology in 2024 with a capacity of 6.25 MWh per 20-foot container and LFP cells with an energy density of 430 Wh/L. CATL says the system is designed to maintain its power and capacity without degradation during its first five years of operation. Compared with the previous generation of its products, CATL claims a 30% increase in energy density per unit of land area and a 20% reduction in the space required for the installation.
CATL currently ranks first globally in both electric vehicle batteries and stationary energy storage cells. According to SNE Research, the company held a 39.2% share of the global electric vehicle battery market in 2025, with 464.7 GWh installed. In stationary storage, InfoLink data placed CATL among the world’s leading cell suppliers in 2025, while other industry estimates put its shipments at 121 GWh and its share of the global BESS cell market at about 20%.
The company says it has five service centers in Mexico, located in Mexico City, Monterrey and Guadalajara, to provide support during system commissioning, operation and maintenance.
Ray See, president of CATL’s Energy Storage Business Division for the Americas, said the value of utility-scale storage depends on combining advanced technology with reliable project execution and support throughout the system’s operating life. He said CATL expects its work with CIP on La Alegría to support the project’s long-term performance and the wider role of energy storage in Mexico’s power system.
CATL also says it supplied more than 80% of the storage capacity awarded in Mexico during 2026 and puts the country’s new projects expected in the short and medium term at about 15 GWh. These figures were provided by the company.
From pv magazine Mexico
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