Sigenergy conducts full-scale fire test on modular commercial and industrial battery system
As energy storage systems continue to scale across commercial and industrial (C&I) sectors, safety has become a top priority – particularly in densely deployed, high-capacity installations.
In an effort to validate the resilience of its system under real-world stress, energy technology company Sigenergy recently conducted a full-scale combustion test on its flagship C&I solution, SigenStack, under deliberately extreme conditions.
The test simulated a worst-case scenario involving cell-level thermal runaway escalating into sustained open-flame combustion.
What set this evaluation apart was the intentional deactivation of all active safety mechanisms.
There were no fire suppression systems, pressure relief valves, or software-based smoke and temperature sensors. The system had to rely solely on its passive structural design.
To initiate the event, 25% of the cells within a battery pack were artificially heated.
Full-size production units were tested using real-world installation parameters, with just 20 centimeters of clearance front-to-back and 30 centimeters side-to-side.
Impressive results
Despite cell temperatures exceeding 300°C, the fire remained fully contained within the affected pack.
Adjacent packs stayed below 31°C, with no signs of thermal propagation, electrical faults, or structural damage.
Post-test inspection confirmed that the battery management unit remained intact, no short circuits occurred, and surrounding modules showed no heat-related degradation.
These outcomes validate the effectiveness of SigenStack’s modular and thermally isolated architecture, which emphasizes risk prevention over post-ignition suppression.
The findings reinforce conclusions presented in the white paper “Comprehensive Safety Protection for C&I Energy Storage Systems”, jointly published by Sigenergy and global assurance provider Intertek.
The report outlines key safety challenges – including thermal runaway, fire mitigation, and system complexity – and highlights SigenStack as a model for resilient and scalable design.
Sigenstack’s compliance measures
SigenStack complies with major international safety certifications, including UL 9540A, IEC 62619, and GB/T 36276, confirming its readiness for global deployment.
Efficiency testing further demonstrated operational performance above 95%.
Instead of depending on reactive fire control, SigenStack adopts a comprehensive six-layer protection strategy.
This includes early warning sensors, insulation barriers, and pressure relief design – all working together to prevent, isolate, and contain thermal events at the source.
With proven fire containment and robust certification, Sigenergy positions SigenStack as a future-ready energy storage system: modular, intelligent, and engineered for safety.
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