[RE-wrenches] Generator Overvoltage Troubleshoot

[Jim Gowdy]

Thanks for that input, right now it's in Generator.  I was advised to try
BACKUP, but the generator was running funny when I put it on that mode.  I
will try that SUPPORT mode and see what happens.

On Fri, Jan 3, 2025 at 6:34 AM Mac Lewis via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> What AC input mode are you using? I'd recommend trying various modes to
> see if it will go away. I tend to use the support mode with the most
> success.
>
> On Fri, Jan 3, 2025, 9:17 AM Jim Gowdy via RE-wrenches <
> re-wrenches at 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
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-- 
Jim with Gowdy Electric
Cambria, Ca 93428
business  805 927 2630
cell  805 975 5279
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