It all depends on the insides of your meter/main combo panel. Most installations in your area do not require a PGE disconnect, so that's one less box on the wall.
PG&D Disconnect for what? The PowerWall? I had to have them installed for my SMA inverters. The first one was separate (in 2003) and in 2011 it was now "integrated" into the inverter. I'm glad I didn't install in between as I heard that for a while it was required to be accessible at the front of the house outside of gated area (which would've been a long run there and back).
Post pictures of the inside of your Main service panel, and the sticker on the inside of the lid. Are you looking for whole or partial home backup?
I'll attach thumbnails of my upgraded 200A panel... It's a Square D "all in one service entrance device", model number SC2040M200C, just like this thread but that was upstream of load centers in the house:
Tesla surprises with a $4800 bill on existing $5300 install contract
Edit: I see that there is a ton of good info on the above thread from
@Vines so I'm curious to hear your suggestions for my setup, especially if there's any way to keep the integrated (center-fed) load center of this panel... Or maybe we end up having to extend critical loads to a downstream critical load panel.
My main panel is in stucco, at the back corner of the house with no seemingly easy options for relocating circuits or anything else concerning the panel (or I would have considered doing this when I had the 200A panel installed when I added my second solar array). One thing I did add at the time was per-circuit monitoring (24 split-coil CTs and an eMonitor system by Powerhouse Dynamics) so I have nine years of per-minute, per-circuit consumption data that I can export to CSV and pivot to my heart's content, and understand what power we consume, for what, and when.
I was hoping to install two PowerWalls for whole house backup, but I'm just not seeing how they're going to integrate it into my panel. Still, I'd like to be as prepared as possible when Semper comes out for my site assessment on Thursday.
I'd love to hear that I could add a 200A master breaker in the lower left corner but if that were possible then I'm sure the box would've come that way instead of having four 100A breakers in the center of the right half. Perhaps they can take advantage of the fact that the meter lugs are connected to those four main breakers by four wires that could presumably be somehow re-routed out to the gateway (if that's allowed) and back into the main panel to feed the four 100A breakers that make up the 200A panel.
Even if I make it past all of that, then I'm guessing the 100A breakers will likely have to be replaced with something smaller like 70A to accommodate the 120% rule and the fact that I have 15A and 20A solar breakers, plus the two new 30A breakers for the PowerWalls.
