A Tesla tech visited me recently to take a look at why the grid was being used even though solar was producing more than 5 times what my home was using, and there was no spike is usage.
During their investigation (he was in conversation with the support team all day), the tech noticed that I set my "Reserve for Power Outages" at 5% and warned me that I could "brick" (it would die, stop working) the Powerwall if it's set this low. This is because the battery could potentially drain to 0%, which could cause it to brick.
Well, I have some issues here:
1) Our area doesn't get outages very often and when it does, we lose power for only a few minutes. 5% is more than enough for those few minutes.
2) What if there was a power outage and the battery drains to 0%? The powerwall gets bricked? This makes no sense. Especially since the powerwall was created to provide backup power during outages.
He said that he was passing along what the support team said and recommended I set my reserve to 30% to prevent bricking the powerwall. After I communicated why setting it at 30% did not make sense, he called the support team back and said 10% is okay.
The issue remains. Whether set at 30% or 10% or 100%, when there is an outage and the powerwall gets drained (doing its job) it could potentially brick, according to the support team.