Here is my two cents I had a similar over voltage. It was caused by the generator. It helped to put a load on the generator, I put on a 500 watt resistance load, it helped but in the end the generator was replaced. Good luck.
On Fri, Jan 3, 2025, 8:17 AM Jim Gowdy via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hi all, > I need some help with a generator overvoltage troubleshoot. I'm > working on an outback offgrid system that consists of 2 x Radian GS8048a, 1 > x MATE3S controller, 1 x FM 80 charge controller, 1 x 55kw single phase > propane AC cummins generator, about 4kw of solar *not sufficient enough to > keep up with the load, and 24 x 4v Rolls batteries series/paralleled to > make 48v. The generator was rebuilt and the batteries replaced about a > year ago and since then, the generator has been faulting due to > overvoltage. I had help and first found that the MATE needed calibrating > so that was done, but the generator still was faulting. I found changing > the AC Input Charging from 30a to 20a seemed to work. I put a power > monitor on the generator output and found that, with the AC Input Charging > set at 30a, noticed that there was a voltage spike up to 300+V at about a > 70a draw. The generator company put a load bank on and verified the > generator may not be at fault and the problem is after the generator. Has > anyone encountered a problem like this and have suggestions? I've attached > a PDF with a timeline of what I've done for troubleshooting so far. > > -- > Jim with Gowdy Electric > Cambria, Ca 93428 > business 805 927 2630 > cell 805 975 5279 > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > 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/re-wrenches@lists.re-wrenches.org/ > 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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