I consulted our Code expert on this question, and this is his explanation: In 2020 NEC and previous code cycles, the N-G bond requirement in the Solar OCPD for supply side taps was a grey area. In the 2023 NEC, it is clear the Solar OCPD for supply side taps requires the N-G bond. This mimics the requirement where a building has multiple service OCPD enclosures. If the N-G bond, supply side tap conductors (phase and neutral, no EGC), and GEC are all sized and installed correctly (as if it is a separate service), there should not be any issues.
I’m not familiar with Midnite inverters, but “CA-DC link Overvoltage error“ sounds like a DC issue, so I don’t see how the AC voltage would matter. If this error is related to AC voltage, maybe the real issue is a faulty neutral connection between the service and utility transformer? Tom McCalmont, P.E. CEO, Paired Power pairedpower.com <http://pairedpower.com/> | LinkedIn <https://www.linkedin.com/company/paired-power/> Direct: (669) 877-2931 > On Oct 23, 2025, at 8:01 AM, Tyrone Houck via RE-wrenches > <[email protected]> wrote: > > My interpretation, and the way it was explained to me by both Ryan Mayfield > and Kyle Bolger(several years ago at this point, popular opinion may have > changed since). Is that it is not a seperate service. > It is however required to have a ground-neutral bond( though in my opinion > pointless and redundant as there is a bond in the enclosure where the tap is > made). If it gives you any issue, ensure as close to equal potential to the > grounding electrode as possible(and make sure your neutral is appropriately > sized). I personally don't see the point but it is an NEC requirement > > > > > On Thu, Oct 23, 2025, 6:08 AM Dave Tedeyan via RE-wrenches > <[email protected] > <mailto:[email protected]>> wrote: >> Hi All, >> >> For years I have understood that when doing a supply side connection, you >> are supposed to bond the neutral to ground in the solar service disconnect. >> I have a Midnite AIO system with two inverters (set up as a supply side >> connection) that recently was getting a CA-DC link Overvoltage error. When >> talking to Midnite, their first response was to make sure that there was >> only one N-G bond in the whole system. When I mentioned that the solar is a >> separate service and thus there is a N-G bond in both the main panel and the >> inverter distribution panel, they said to remove it from the inverter >> distribution panel. I want to make the system work right, but I also am >> hesitant to do something against how I have understood the NEC to be for a >> long time. I am curious if you all have thoughts on this or run into a >> similar situation. >> >> Cheers, >> Dave >> >> -- >> >> <https://www.sungineersolar.com/> >> Dave Tedeyan, P.E. >> Owner | Sungineer Solar >> p: he | him | his >> a: 1653 Slaterville Rd. >> <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g> >> >> <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g>| >> Ithaca, NY 14850 >> <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g> >> w: www.sungineersolar.com <http://www.sungineersolar.com/> >> c: (607) 270-0370 >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> <http://re-wrenches.org/> >> >> List Address: [email protected] >> <mailto:[email protected]> >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org <http://www.members.re-wrenches.org/> >> > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org >
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