Submitted by Bigtanuki on October 21, 2017
After having one of my two PW2 units replaced due to cooling pump failure I found that I was unable to change the behavior of the PWs between backup and self-consumption modes and ancillary control settings.
After repeated calls to Tesla Powerwall support I got it elevated to their high level tech support but no feedback as to the issue. I was assured on Friday (10/20) that it just needed a software reset that could be done remotely but that it required some high level access among the support team and I would get a call back by Friday afternoon. Saturday morning and no call yet so I called in to PW support AGAIN. I got through to a very helpful young lady that confirmed that my case was elevated and she told me that the control issue is apparently related to the latest firmware release (1.9.0-rc8-TH) and they were working on it. Now that I know it's firmware related I'm thinking there's nothing more to do but wait.
As of now my batteries are at ~100% off of solar yesterday and I'm feeding solely off the grid. Oddly enough feeding off the grid feels pretty strange. In the weeks since the install and commisioning (8/14) I've managed to avoid using or selling anything to the grid with the exception of charging the Model S or not making enough room in the battery for excess solar by dumping into the Model S. In the last month I've used 190 kWh and sold back 59 kWh. I'm pretty happy with that.