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Inspection & PTO process when adding additional powerwall(s) & panels

Electrph

Member
Aug 29, 2019
468
312
Central California
I just received PTO on my 2 powerwall and 8.16 kW pv purchased thru Tesla, I now of course want to add one more power wall and possibly 4 additional panels ( I know should have done it all at once but ,,, what are you gonna do ).
So my question is what is inspection / PTO process as far as using existing already approved powerwalls ? Simply cannot switch on additional power wall circuit breaker until PTO ? How would addition of panels work since cannot keep new panels “offline” from new ?
Or is addition of powerwalls and/or panels viewed as one all new system for purposes of inspection & PTO and I must go back to “ extensive off grid testing “ until new PTO received ?
I am on SCE if that is relevant
 
Last edited:

jjrandorin

Moderator, Model 3, Tesla Energy Forums
Nov 28, 2018
11,403
13,254
Riverside Co. CA
The additional powerwall isnt really an issue. The PTO kind of wont matter since once its installed and you pass your city / county inspections, you can pretty much just run it till you get official PTO. When you add powerwalls to existing solar, you are reducing load on the grid etc, so its more about the city / county inspection (is it safe, and installed to code?).

Most of the time, companies dont want to simply "add panels" to an existing system, so you will need to find out if they will even do that. If so, I am not sure how that would work.
 

Electrph

Member
Aug 29, 2019
468
312
Central California
Not dead set on adding panels .. just wanted to add 4 to get bundle discount with the additional powerwall .. if Tesla does not want to or cannot add panels then I would be fine with just adding 3rd powerwall ...
I would definitely run system off grid prior to PTO ... just curious how process differed for adding vs all new
 

CrazyNavi

Member
Jun 15, 2021
62
15
BayArea
Not dead set on adding panels .. just wanted to add 4 to get bundle discount with the additional powerwall .. if Tesla does not want to or cannot add panels then I would be fine with just adding 3rd powerwall ...
I would definitely run system off grid prior to PTO ... just curious how process differed for adding vs all new
@Electrph did you ever figured out adding additional powerwall? I got 8.16kWh +2PWs and was thinking of adding another one, as soon as UL+ spec pass so I can stack them.
 

Electrph

Member
Aug 29, 2019
468
312
Central California
@Electrph did you ever figured out adding additional powerwall? I got 8.16kWh +2PWs and was thinking of adding another one, as soon as UL+ spec pass so I can stack them.
i checked .. only option to add one powerwall thru tesla at that time was addition of "small" pv system (another i think 12 panels which i do not want)
decided to wait see if anything changes w/ tesla
 

CrazyNavi

Member
Jun 15, 2021
62
15
BayArea
i checked .. only option to add one powerwall thru tesla at that time was addition of "small" pv system (another i think 12 panels which i do not want)
decided to wait see if anything changes w/ tesla
Yeah, make sense I will reach out to some of the 3rd parties to see what they would offer
 

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