Innergex adds 210 MWh BESS

Battery storage is the thing turning Chile’s solar glut into usable evening power. That is the big picture behind Innergex’s latest move in the Atacama Desert. The company has energized and connected its San Andrés II battery project in northern Chile — a 42 MW, 210 MWh system that sits next to its existing San Andrés solar plant and has already begun initial charge and discharge operations. The point is simple: soak up cheap daytime solar, then push that power back out when the grid actually needs it. ### What exactly did Innergex add? San Andrés II is a 5-hour battery system, which means 42 MW of output and 210 MWh of stored energy. It is located in Chile’s Atacama region and tied to Innergex’s existing San Andrés solar facility, which has 50.6 MW of solar capacity and has been operating since 2014. This is not Innergex’s first battery in Chile, either — it follows the 50 MW, 250 MWh Salvador battery facility that entered operation in October 2023, and it adds to a second follow-on project, Salvador II, that Innergex has said is still moving toward commissioning. (pv-magazine-latam.com) ### Why put a battery next to a solar plant? Because northern Chile has a lot of solar and not always enough room on the grid at the right hour. Midday power can get trapped behind congestion and weak transmission links, which pushes prices down and forces curtailment. A co-located battery changes that math — it stores surplus solar during the day and discharges into the evening and early morning, when prices and system value are usually higher. (pv-magazine-latam.com) That is basically the whole commercial logic of these projects. ### Why is Chile such a hot battery market? Because the country’s renewable build-out got big enough to create its own balancing problem. In March, solar supplied 29% of Chile’s electricity generation, with instantaneous peaks reaching 75%. At the same time, industry figures showed more than 2.5 GW of battery systems already operating and another 6.3 GW under construction in projects linked to solar plants, while a separate March 2026 ministry snapshot counted 4,597 MW of storage under construction and 2,119 MW in testing. (innergex.com) The exact bucket depends on who is counting what, but the direction is unmistakable — Chile is building batteries at scale, fast. ### So why does this get harder as the market grows? Because adding battery megawatt-hours is the easy part. Getting hybrid plants to behave properly on a live grid is the hard part. Innergex’s earlier Chile battery rollout needed SCADA migration, medium-voltage switchgear integration, a master power plant controller, remote operation links, and real-time data compliance with Chile’s system operator. That is a good reminder that a battery project is not just containers and inverters — it is also controls, telemetry, protection logic, and dispatch coordination. (pv-magazine.com) ### Why do commissioning windows matter so much? Because “energized” is not the same thing as fully de-risked. Projects can be mechanically complete, grid-connected, and still spend weeks or months ironing out controls, protection settings, operating envelopes, and market dispatch behavior. In a market like Chile, where hybrid solar-plus-storage projects are multiplying, realistic commissioning schedules matter more than headline capacity numbers. (n3uron.com) If the controls stack is not ready, the asset may be physically there but commercially half-alive. This is an inference from how these projects are built and integrated, not a claim that San Andrés II is delayed. ### What does Innergex get out of it? More flexibility and better revenue shaping. Innergex has already framed its Chile batteries as a way to shift generation into higher-value hours, collect capacity payments, and smooth the earnings profile of merchant solar assets. That matters in Chile because price spreads between midday and evening can be wide, and batteries let owners monetize that spread instead of dumping excess solar into a congested market. (pv-magazine-latam.com) ### Bottom line? San Andrés II is not just one more battery. It is another proof point that Chile’s power system has entered the storage phase of the renewable build-out — where the challenge is no longer just adding solar, but making all the moving parts work together on time. (pv-magazine-latam.com) (innergex.com)