Mine worked perfectly a week ago when power went out for 2+ days!.
FYI my electrician installed the County Fire required kill switch and stickers (this essentially allows first responders to kill the Powershare powered homes in case of fire or emergency, NEMA code requires this but code notes it is only for stationary batteries). This is typically done for Power Walls and the Powershare Gateway has a connector for this. However when we tested out the kill switch it failed - Tesla advised that while the wiring is included in the Gateway it has not yet created software that will all the kill switch to work. Not sure where that leaves me, but my Powershare does work - and it works very well.