Shanghai – September 07, 2026 -- APsystems' APstorage 261L liquid-cooled commercial and industrial energy storage system has passed UL 9540A fire propagation testing, with thermal runaway fully contained within a single enclosure under witness from TÜV Rheinland.
Tests under extreme conditions show zero fire spread
The APstorage 261L cabinet was tested at 100% state of charge with its fire suppression system deliberately disabled. No short circuit, fire spread, or explosion occurred, and the cabinet maintained structural integrity throughout the test.