APsystems' APstorage 261L Passes UL 9540A Fire Safety Test
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Shanghai – September 07, 2026 -- APsystems' APstorage 261L liquid-cooled commercial and industrial energy storage system has passed the UL 9540A fire propagation test under the witness of TÜV Rheinland, with thermal runaway fully contained within a single cabinet and no propagation to adjacent units.
Cabinet Withstands Test at Full Charge With Fire Suppression Disabled
The test subjected the APstorage 261L to extreme conditions, operating at 100% state of charge with its fire suppression system intentionally switched off. No short circuit, fire spread, or explosion occurred, and the cabinet retained structural integrity throughout.