I spoke with a representative from Tesla today and was told that they have submitted a plan to the electric company to allow for "the removal of the roadblock" holding back all battery projects from moving forward. They plan to have final approval in 4-6 weeks and will update me at that time.
I don't know where you are located, but if you are in california and you are on NEM1 or NEM2 I would be very careful about installing your powerwall. The powerwall will change your "power plant" and will invalidate your NEM grandfather. This could result in significant costs when drawing power from the grid. If you are not in CA, and that is someplace in the thread I apologize. I am in CA, and have solar and I am on NEM2. My buddy recently installed a PW and it put him on NEM3 which carries a 7 cent cost per KW when drawing generated power out of the grid. I was shocked.
I dont recall reading anything that said it were possible to invalidate my grandfathering. Ill make sure to keep that in mind though. Im in AZ. As you are well aware, nobody is more anal than California lawmakers, so hopefully AZ is a little more open to advancements.