Two big battery makers pass the tougher large-scale fire test
Photo: UniEnergy Technologies, CC BY-SA 4.0, via Wikimedia Commons
SK On said on Oct 28 that its battery storage container passed a large-scale fire test. The test requirements were made stricter in March 2026. Sungrow said on Oct 22 that its PowerTitan 3.0 passed a large-scale fire test run by UL Solutions under the latest requirements. In both tests, thermal runaway did not spread to the next container. Underwriters should ask two things. Was the project's fire test done under the 2026 rules? Does the spacing in the test match the spacing as built? Sources: SK On; Energy Global.