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@jhn_ that's interesting - when was your original Powerwall install? (I'm wondering if the sticker is some recent artifact.) Did you, or anyone, have to do load calculations for the permit, get/use Tesla's data and calculations?

Several people advised getting my expansion done or at least roughed in) before engaging with Tesla; and, Tesla has been really uncommunicative, which is kinda scary. Obviously the people who responded know more than I do, so I'm taking the advice: I cancelled the order, and I'll get my house...

You're right, that's good advice ... but, given the availability of electricians around here just now (everyone seems to be booked!) and the speed of our Planning Dept, I suspect that sensible approach would again take me well outside the timeline I want to be on (as well as boost my costs). If...

I worry about touching that panel affecting Tesla's warranty; I worry about that sticker making an electrician/AHJ unwilling to touch that panel; so I expect it means contacting Tesla every time I want to affect that panel, and that's why I'm trying to find out what that sticker actually...

@arnolddeleon, I hadn't thought about a "largest breaker" limit - thanks for pointing out that possibility. My current cooktop is gas, but I have an electric wall oven that has a 40A service, and I can get an induction range (oven+cooktop) to fit that, so it would be OK. My growth/change...

Yeah, I'm probably mixing several things I shouldn't - this is a new set of terminology and concerns and rules (codes) for me! So, thanks for your patience/education ... Agreed, the 100A is a peak draw limit for me, and one I'm nowhere near today. I'm worried mainly that if I go for my full...

BG, thanks - good points, but ... I'd love to get squared away on 200A first, but the timeline doesn't fit my needs. I started out wanting to relocate and upgrade the main panel and service, but my service drop is 100A direct-buried cable, so that option is way too time-consuming and expensive...

Replying to myself - I think I found tandem PlugOnNeutral arc-fault breakers for the HOM2040L225PRB which Tesla is proposing. () So maybe a 20/40 panel is OK ... using these looks like it would leave me with a some spaces/circuits open.

Thanks! Good advice on trying for a larger feed to the subpanel. One point on using tandem breakers though, is that the run from the Main Panel to the new subpanel is over 6 feet (it's actually 40 or 50 feet of cable, I think). I *think* that means the new breakers in the subpanel are "new...

Has anyone added circuits to their Tesla Solar whole-home setup - how did it work? How long did it take? I'm doing a whole-house backup (with the Backup Switch/meter collar, no Gateway). The system is bigger than we need now (8.5 kW, Powerwall+, Powerwall 2.1) specifically to be ready for...