BTW, DC Clamp on meters are now cheap and feature rich and surprisingly reliable. Check out the UNI-T UT203. Cheap enough that we used these to give as gifts to customers.
Larry On Apr 4, 2022, at 9:24 AM, larrycrutcher via RE-wrenches <[email protected]> wrote: Check short circuit (Vsc) on each string to see if a PV module is failing. Voc can be deceptive with no load. Larry Crutcher Starlight Solar Power Systems On Apr 4, 2022, at 9:12 AM, 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 _______________________________________________ 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
