Power for the Future: Latin America's First DC-Coupled Project drives Chile's Clean Energy Journey

Power for the Future: 139 MW/638 MWh PV+ESS Project in Chile

Project Name:

BESS Coya

Capacity:

PV-139 MW ESS - 638 MWh

Core Technologies:

Advanced DC-Coupled PV+ESS Solution with Eight ST2752UX Units per Inverter

The Background

ENGIE's 638 MWh BESS Coya project in Chile is set to become Latin America's largest energy storage facility and a global benchmark for DC-coupled solar-plus-storage. A project of this scale required a battery system up to the task, and Sungrow's liquid-cooled PowerTitan ESS was the ideal choice. With its all-in-one centralized inverter, the system will enhance grid stability and accelerate Chile's transition to renewable energy.

The Challenges

Challenge 1: Complex Systems That Had to Work Together

As Latin America’s largest DC-coupled solar-plus-storage project, it involved serious complexity. The 638 MWh battery energy storage system (BESS) had to integrate with an existing 181 MW PV plant, demanding precise component matching and sophisticated coordination. Sungrow's PowerTitan addressed this with its prefabricated, modular design. All core components—the inverter, battery, transformer, and RMU—are housed in a single 40-foot container, which massively simplified both system integration and on-site construction.

Challenge 2: Cooling in an Unforgiving Environment

The Atacama Desert can see temperatures swing up to 80°C in a day. This is not ideal for electronic equipment, but Sungrow's PowerTitan was built for it. Its smart liquid-cooling technology controls temperatures within a precise ±2.5°C margin, addressing the intense thermal stress. Additionally, its inverter and battery containers are rigorously tested to withstand extreme conditions, ensuring the system runs reliably in one of the driest places on Earth.

The Solution

SG6250HV-MV Features a unique integrated design for rapid deployment and unified maintenance, simplifying both setup and long-term service. ST2752UX Efficient liquid cooling improves heat dissipation, extending battery life while increasing system discharge capacity.

The Impacts

When fully operational, BESS Coya will stabilize power for almost 200,000 households in Chile's Antofagasta region. It represents a new benchmark for large-scale solar-plus-storage projects. The facility helps stabilize the grid by providing energy during periods of peak demand. Overall, the project is expected to cut backup diesel usage by 260,000 tons annually, improve grid stability, and bring Chile one step closer to its sustainability goals.