Hilton, Can you give more details about the inverter? And when the DC was reading 0 volts, did you try turning off the disconnect at the array to see if isolating it from the inverter, it would show voltage? Howie
*Howie Michaelson**Sun Catcher* *NABCEP Certified Solar PV Installer™* *Solar Electric Systems Sales & Service802-272-0004* On Thu, Mar 16, 2023 at 5:15 PM Hilton Dier via RE-wrenches < [email protected]> wrote: > Hello Wrenches > > Here’s a classic problem for you. I installed an array of 11 Trina 380s on > a ground mount, commissioned January 6 of this year. It worked fine for a > while, but in the last week it has had an intermittent power problem. > > For example, this morning it was putting out zero watts at the inverter. I > measured voltage at the disconnect at the array and got zero volts. I > checked all the connections and wires and it all seemed solid. I had to > leave so I couldn’t start isolating modules. I came back this afternoon and > it was producing an appropriate amount of power for the light conditions. > > What’s the most obvious thing that could be going on? Some kind of micro > crack and thermal expansion? > > Thanks, > > Hilton Dier III > Renewable Energy Design > Missisquoi River Hydro LLC > _______________________________________________ > 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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