Trina Storage’s Elementa 2 Pro passes large-scale fire safety and propagation tests

Trina Storage, the energy storage arm of Trinasolar, has completed a series of large-scale fire safety tests on its proprietary Elementa 2 Pro system. The testing, conducted in China’s Hebei province, was designed to evaluate enclosure integrity, fire isolation, and the reliability of critical safety systems during a simulated catastrophic failure.

Trina noted the program was executed in accordance with upcoming international standards, including CSA/ANSI C800-2025, NFPA 855-2026, and the November 2025 revision of UL 9540A.

To test the safety margins of the Elementa 2 Pro both at and beyond standard requirements, Trina Storage reduced the spacing between containers to just 10 centimeters. This setup created a higher thermal challenge than a typical industry configurations to more dramatically assess results.

During the test, Trina said an initiation container was subjected to internal flames exceeding 1,300°C. Trina reported that the container remained structurally intact with no collapse, and with thermal propagation under scrutiny, adjacent units were safe; data showing cell temperatures in the neighboring containers remained well below critical venting points. Max cell temperatures in three configurations, back-to-back, side-by-side, and face-to-face, reached 43.9°C, 23.9°C and 28.6°C respectively, achieving UL 9540A acceptance critera and beyond.

System resilience

The evaluation also monitored the performance of electronic and safety infrastructure during the blaze. The fire alarm in the initiation unit remained operational until the point of total power loss, while electrical cabinets maintained internal separation through layered isolation.

Post-test inspections revealed that the fire protection systems and module-level thermal management systems in adjacent containers remained 100% available. Furthermore, the battery cells in those adjacent units retained their full charge and discharge performance capabilities.

Site Configuration

Images from the testing site supplied by Trina show a “T-shaped” arrangement of the Elementa 2 Pro containers, highlighting the proximity used to simulate high-density project layouts. The units feature multi-door access and integrated thermal management systems designed to provide internal separation.

The successful certification by TÜV Rheinland follows a trend of battery energy storage system providers undergoing more rigorous, large-scale destructive testing to satisfy the increasingly stringent requirements of insurers and local fire authorities globally, and build trust.