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 > >
_______________________________________________ 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
