For anyone else interested, here's a link to the permit application for the battery system: LINKTesla has a new permit for a megapack install at this site. Hopefully the site will be turned on before the batteries are installed. The first permit probably failed for arc fault protection, ground fault requirements or the open conduits into high voltage switching gear. That is my supposition.
Nothing much to see besides the description, though. "Add (1) Tesla Megapack for energy storage at their existing supercharge station"