If you disconnect MC connectors under load they will go bad really fast. They can’t tolerate any arcing at all when you disconnect them under load. I’ve run into this in the past but in this case the voltage getting through was even less.
Bob Ellison > On Apr 4, 2022, at 12:13 PM, Chris Daum via RE-wrenches > <[email protected]> wrote: > > > Hey folks: > > We have a problem we just can’t figure out. We have a customer in OK with a > simple array of eight Trina TSM 310-DD05H(II) modules, four stings of two > modules into the combiner (Midnite MNPV6). Simple, right? He connects two > modules, gets his 73.2VDC and lands his PV output leads on the circuit > breaker and discovers he only has 39VDC. So, what are the possibilities? > Loose connections at the MC4 connectors? Bad blocking diode? Ideas anyone? > > He’s in Henryetta, OK, and we cannot seem to find anyone local to help him. > All ideas appreciated! > > Best, > > Chris Daum > Oasis Montana Inc. > 406-777- 4321 > 406-777-4309 fax > www.oasismontana.com > > > _______________________________________________ > 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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