Chile Retrofits 135 MW Solar Farm with Massive Battery

Chile just took a major step toward a smarter, cleaner energy grid by adding a massive battery system to an already working solar farm.

The Granja Solar project, which already generates 135 megawatts of solar power, is getting a 420 megawatt-hour battery upgrade. That's enough storage to power tens of thousands of homes during peak evening hours when the sun isn't shining.

Copec Flux, Chile's renewable energy leader, is partnering with Stem Inc. to make it happen. Instead of building an entirely new facility, they're retrofitting the existing solar farm with batteries and smart software that acts like a brain for the whole system.

The technology, called PowerTrack, will monitor and control both the solar panels and batteries as one integrated unit. It means Chile can capture abundant midday sunshine and save it for later, delivering electricity to the national grid when demand and value are highest.

This matters because solar and wind power are incredible resources, but they don't always produce energy when people need it most. Batteries solve that puzzle, making renewable energy as reliable as traditional power plants.

The Ripple Effect

This project could become the blueprint for clean energy across Latin America. Chile and Colombia are already eyeing similar upgrades as both countries race to meet climate goals while keeping their grids stable and affordable.

By choosing to upgrade existing infrastructure rather than start from scratch, Copec is showing other countries a faster, smarter path forward. The same model could work anywhere solar farms already exist but need better storage and control.

Copec brings nearly 90 years of energy experience in Chile, and now they're applying that know-how to the renewable transition. Their combination of local expertise and cutting-edge technology gives them an edge in delivering projects that actually work in real-world conditions.

Stem has been perfecting this kind of energy intelligence for nearly 20 years across 55 countries. Now they're bringing that experience to one of South America's most ambitious energy markets.

The partnership shows what happens when proven technology meets regional expertise: faster deployment, better performance, and a model others can follow. As more solar and battery projects come online across Latin America, they'll have Granja Solar as proof that hybrid systems work.

Chile is building the flexible, intelligent grid the world needs, one solar farm at a time.