From the linked article…

“But the technology is not without controversy.

Fires broke out at the Vistra plant on Sept. 4, 2021, and Feb 14, 2022. Investigations showed that they were caused by a malfunction in a fire sprinkler system, which released water and caused several of the units to overheat.

Then in September 2022, a fire broke out at the PG&E Elkhorn battery plant. Police closed Highway 1 for 12 hours. An investigation found it was caused by an improperly installed vent shield on one of the 256 units, which allowed rainwater to get in and short out the batteries. There were no injuries to firefighters, PG&E employees or the public.

…”