This is the most important point. You need to look at the detailed NEM-PS billing to see if they are allowing all your solar exports for NEM credits. However, since you have Powerwalls, this may not be an issue due to significant self-consumption, even with TBC. If they are disallowing ANY of your solar NEM credits, you need to press them on correcting their records and recalculating your bills.PG&E talks about system size in panels. What I have is 128 (85 watt) + 12 (205 watt) panel system. I think I need to get this corrected since I think they're limiting what they credit me on export based on what they think the size of the system is.