The evaluation, conducted under extreme conditions, tested a fully charged 940 kWh liquid-cooled cabinet with thermal runaway intentionally triggered and all suppression systems disabled. Over a four-hour window, the system demonstrated structural integrity, preventing fire propagation to neighboring units without requiring corrective actions. The results were independently verified by TÜV Rheinland and the Energy Safety Response Group.
e-STORAGE KuBank 3.0 becomes first to pass UL 9540A:2026 fire testing
Canadian Solar’s energy storage subsidiary, e-STORAGE, has secured a significant safety milestone for its KuBank 3.0 commercial and industrial system. The unit is the first in the industry to pass the rigorous UL 9540A:2026 large-scale fire test, clearing a major hurdle for global deployment and project permitting.
KuBank 3.0 utilizes an independent physical compartment architecture and high-strength, fire-resistant materials to isolate potential hazards. Its integrated cooling system maintains battery temperature deviations within 3°C, while multi-stage monitoring provides early detection of thermal events. With mass production now underway, the system offers flexible 400V, 690V, and 800V architectures, positioning it for immediate commercial use. Jeff Roy, President of e-STORAGE, noted that the successful test serves as a critical third-party validation for customers navigating increasingly stringent regulatory environments.
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