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    #16
    Originally posted by wwhitney View Post
    What am I missing--how is a second service disconnect that only serves PV any different from a line-side tap? Or is the idea to put a little load on the second service disconnect, too?

    Another option is that if a 200A service disconnect can be added in front of the existing 200A main panel, then the 200A feeder from the new service disconnect to the main panel can be tapped per 705.12(D)(2)(1).

    Cheers, Wayne
    It's a code section that one cites as a way of pointing out that their purported prohibition is illegal. Get the actual AHJ to sign off on the service configuration and there's not much they can say.

    As for the other option... might as well just replace the service equipment. Unless it turns out that the meter and panel are in separate enclosures, but the 'centerfed' remark suggests otherwise.

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      #17
      Originally posted by jaggedben View Post
      Again, if you can get the AHJ to agree to a compliant service configuration I would not accept that answer from the utility. (And for ggunn, the utility is not the AHJ here!...
      Hence my disclaimer: If the "NEM Team" is acting within the bounds of their authority you may have to do something else, "if" being the operative. Here in Texas we sometimes have dueling AHJ's (cue the music from "Deliverance") where the utility and the city both have their rules, and we have to comply with both sets.

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        #18
        Originally posted by jaggedben View Post
        It's a code section that one cites as a way of pointing out that their purported prohibition is illegal. Get the actual AHJ to sign off on the service configuration and there's not much they can say.

        As for the other option... might as well just replace the service equipment. Unless it turns out that the meter and panel are in separate enclosures, but the 'centerfed' remark suggests otherwise.
        I thought about just getting the permit per code, but worry the utility would refuse to power down to allow the work to be performed, or that the utility and the AHJ are aligned and the AHJ has ultimate authority and they'll be the ones to enforce SDG&E's position.

        Also thought about replacing the center-fed 200A panel with a 400A panel but had an electrician warn that the service itself (underground service coming in from the street) might only be 200A and so that it was a bad idea.

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          #19
          Originally posted by mcsolar View Post

          Also thought about replacing the center-fed 200A panel with a 400A panel but had an electrician warn that the service itself (underground service coming in from the street) might only be 200A and so that it was a bad idea.
          There would be nothing wrong with that. You don't need to upgrade the service, you just need to upgrade the panelboard to meet the 120% rule. You could get say a 400 amp bus panel with a 200 amp main breaker. That would be factory order panelboard and probably bolt on breakers so it wouldn't be super cheap, but it would look nice.
          Ethan Brush - East West Electric. NY, WA. MA

          "You can't generalize"

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            #20
            You could also meet 705.12(D)(2)(3)(c) by using a 400A panel with a 200A breaker to a new sub for the loads and a 125A breaker to a sub for the three inverters. You can put in a 200A main breaker so as not to have to upgrade the service conductors. And that will get you around this stupid line side tap issue. But you still have to replace the service equipment.

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              #21
              I would also bet that the utility might delay permission to operate in order to upgrade the transformer. But if the transformer is shared with any other customer then your client should most likely not have to pay anything for that.

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