We’ve exceeded my ability to be confident in my answer about this. However, I’ll run it by my EE and try to get a better understanding. I will say that we don’t bother with an AT on systems that have utility service because the majority of the time the utility will be available to take on any phase overloads within the bounds of its switching ability. We do use ATs in all our off-grid builds. So, the use case of having the AT inline with the utility is not something I’ve thought much about. I may have to retract my advice above to use an AT 