VALLEY CENTER - A Terra-Gen’s battery power and storage plant commercial fire in Valley Center on Sept. 18, prompted an evacuation. The fire started around 5:15 p.m. at a building at Valley Center Road and Vesper Road, according to the San Diego County Sheriff's Department.

An evacuation center was established at Valley Center High School. Evacuation and shelter-in-place orders were lifted around 8:30 p.m.,

and all roads in the area affected by the fire have been reopened, sheriff's officials said.

Regarding the Valley Center fire at Terra-Gen’s battery power plant facility, According to Terra-Gen’s media contact Amy Roth, the battery bank currently on fire is part of their energy storage facility that has a contractual relationship with SDG&E. She confirmed that the batteries are Lithium-Ion.

It's unclear what may have sparked the fire. The cause of the fire is under Investigation.

City News Service contributed to this story.