[RE-wrenches] Generator overvoltage troubleshoot

[Jim Gowdy]

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 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?

-- 
Jim with Gowdy Electric
Cambria, Ca 93428
business  805 927 2630
cell  805 975 5279
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