That's a good point. I didn't install this system, but I know for certain the PV EGC is not landed in either of the dual Sol-Ark inverters. It must be landed on a grounding terminal in a wiring trough or load center. I'll have to track that down. I'm not sure how the GE system is installed, either.
Jason Szumlanski Principal Solar Designer | Florida Solar Design Group NABCEP Certified Solar Professional (PVIP) Florida State Certified Solar Contractor CVC56956 Florida Certified Electrical Contractor EC13013208 On Sun, Apr 6, 2025 at 11:03 AM david quattro <[email protected]> wrote: > Hi Jason, > SolArk tech support has told us to land the PV equipment ground > directly to an electrode. ie do not land the PV ground in the inverter’s > built in ground-bar. This detail wasn’t in their manuals years ago. I hope > this is helpful 🤙🏼 > David > > > > On Sun, Apr 6, 2025 at 7:19 AM Jason Szumlanski via RE-wrenches < > [email protected]> wrote: > >> If anyone is using this tester to do insulation resistance testing, I >> would appreciate any pointers you have. >> >> I have used it successfully to test home run DC strings from >> rooftop junction boxes to inverters to check for nicks in wires and hard >> faults to ground or short circuits. However, I am currently facing a >> Sol-Ark 15K with three strings of PV that all seem to cause an intermittent >> DC insulation fault (F24). I have isolated each string by disconnecting the >> other strings at the rooftop junction box. With only one string connected >> to the inverter, regardless of which string it is, I will eventually get >> the F24 error. >> >> Since I have ruled out the home run wiring, It appears the issue must be >> within the array somewhere. I would like to use the ET600 to help track it >> down, but I am reading conflicting information on how to properly undertake >> the test on each string. I know that I can disconnect the conductors >> between each PV string and the junction box and test each jumper wire >> individually while disconnected. But what about the PV module leads >> within the string of connected modules? I'm suspecting a pinched PV module >> lead somewhere, but I don't know where to start looking. >> >> Jason Szumlanski >> Florida Solar Design Group >> >> >> >> >> >> _______________________________________________ >> 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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