Steve,
Yes, in the same sequence: 75.5V, 73.8V, 73.9V, 74.0V. All just about
what I'd expect.
Brian,
I have seen that with KC120s over the years - good Voc and Isc but no
MPP. That's a known failure that Kyocera (to their credit) continues to
warrant 15 years out. But I haven't seen it with t
Hi Allan,
I would try turning off string #3 and see what happens to the vmp.
I'm guessing it'll go up to a more normal voltage.
I just had a very similar experience, also BP modules, very brown.
2 sets of 4 billion n series to a 12v system. One set was totally dragging down
the VMP, I disconn
Brian
Can you do a solmetric type test, when you performed the amp test the volts
were at near "0" so the test does not show an accurate value, you said the
modules are brown this is not good but are they checked because if so you
are done needs new modules. I would suggest doing some additional te
If it is a module issue it could be bad solder joints, shorted diodes, or a
combination of both. I just curve traced 12 12-year old KC120s - all
except 2 tested fine for Voc with a DMM (2 were totally dead). However
with the curve tracer they all exhibited more of an IV "angle" than a
curve, goin
I only supply L-16s at my cost to clients with existing banks than
have failures. It has been hazy of course as to what is due to poor
maintenance and what is due to defective batteries.
There was a Trojan Rep on the list. If you are still here, please chime in.
At 10:56 AM 8/24/2016, you wro
Hello Allan,
Did you check the Voc of each string? Is it possible that there could one
or more shorted bypass diodes in the modules?
Just a thought.
Steve Bell
Morningstar tech support
On Thu, Aug 25, 2016 at 8:04 AM, Allan Sindelar
wrote:
> Wrenches,
> Here's one I haven't seen before. 1997
Wrenches,
Here's one I haven't seen before. 1997 grid-tie battery backup system
that was one of my first, although actual installation was by another
before I was licensed. 16 BP 275, 36-cell 12V modules, the standard of
that time. Early Outback MX60 replaced C40 around 2005; array rewired to
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