Canadian Solar has launched SolBank 4.0, a 6.25 MWh liquid-cooled utility-scale LFP battery storage system designed for long-duration energy storage and AI data center backup power.
Chinese-Canadian PV module manufacturer Canadian Solar has unveiled SolBank 4.0, a new utility-scale battery energy storage system, at SNEC 2026 in Shanghai.
The company presented the product as a high-density, long-duration storage platform designed for large-scale energy storage projects and backup power applications for AI data centers. It was launched alongside Canadian Solar’s self-developed string grid-forming PCS solution and its third-generation TOPCon module.
SolBank 4.0 is a 20-foot standardized liquid-cooled container with 6.25 MWh of DC capacity. Canadian Solar said the new system increases cell energy density by 25% compared with its previous generation, while improving overall station-level energy density by more than 40%. The company also said the higher integration level can reduce balance-of-system costs by around 20%.
The system is designed around a 1,500 V DC architecture and supports 2-hour, 4-hour and 8-hour applications. Canadian Solar said customized long-duration versions are intended for projects requiring discharge durations of more than four hours, including large storage plants and AI computing center backup power.
