> TLDR; The megapack was taken offline at the time of the fault, so it was not charging or discharging. A leak in the cooling system caused a short circuit in s

> TLDR; The megapack was taken offline at the time of the fault, so it was not charging or discharging. A leak in the cooling system caused a short circuit in some component that started the fire. So the power to sustain the short and subsequent fire must have come from the internal pack. Also, offline mode disabled all protection systems and monitoring communications, so they had no way of knowing anything was wrong until someone yelled fire.