Great Power successfully completes full-scale fire test

Great Power has successfully completed a full-scale fire test with its Max-20HC-5000 DC liquid-cooling container energy storage solution, which features 314 Ah LFP battery cells and has a rated energy capacity of 5 MWh.

The test focused on the system-level fire safety performance of Great Power’s system and was conducted with reference to ANSI/CAN/UL 9540A:2026. It was designed to assess the potential impact of a full-scale fire on adjacent energy storage containers and surrounding structures, as well as factors such as system layout, separation distances, and fire protection design.

The test was carried out under demanding conditions, with the system at 100% state of charge, the container doors closed, challenging separation distances between containers, and the active fire suppression system disabled. Seven cameras were installed inside the container in which the fire was initiated, and seven were stationed outside the container to record the impact of the fire on adjacent containers and building structures.

The minimum separation distance between containers was 150 mm, with the initiating container directly facing another container. The test wall was positioned 3,000 mm from the side of the initiating container’s electrical compartment. During the test, the peak cell temperature in the adjacent container remained below 70°C, which was well below the cell venting temperature threshold. The container also features an optimized heat dissipation path designed to help contain thermal runaway within the unit.

No fire propagation to adjacent containers was observed throughout the test, and there was no structural collapse at any time. At an early stage of the test, flames remained confined within the initiating battery module, demonstrating the effectiveness of the thermal isolation design. No thermal runaway occurred in any adjacent module, and the fire self-extinguished after 16 hours. Following completion of the test, Great Power received a certificate from TÜV Rheinland.

According to Frost & Sullivan, Great Power ranked No. 1 globally in residential energy storage battery shipments in H1 2026, with a 28% market share. In recent years, the company has expanded its scope to produce not only LFP batteries, but also solid-state and sodium-ion batteries for applications from homes to AI data centers.

Great Power’s energy storage cell manufacturing is over 95% automated to ensure consistency and reliability, with flexible packaging and integration lines to enable customized solutions for its customers. In 2025, the company obtained the EN 9100:2018 Aerospace and Defense Quality Management System Certification from TÜV Rheinland Greater China for its Zhuhai manufacturing base, confirming that the company’s quality management system meets the requirements of EN 9100:2018 and is registered in the IAQG OASIS database.