[RE-wrenches] PV210 Curve Tracer Issues

[Dave Tedeyan]

Does anyone here have a good understanding of the Seaward PV210 curve
tracer? I recently went to commission a commercial site where nearly all of
my 90 traces did not come out looking right. It looks like the tracer is
just not taking enough data points to come up with a good trace. It also
was not consistent.

In the attached file, the two strings that have a Voc of about 800V were
actually the same string. It seemed random that the tracer would take more
or less points, and then come out with wildly different fill factors.

The only times that it seemed to take more data points to come out with a
(relatively) good curve was when the irradiance was changing during the
trace. That is the third trace on the graph of a different string with Voc
of about 435V.

I have not used this a ton, but in the past I have gotten good traces out
of it. When I had seen this in the past, I contacted Seaward, and they gave
me a free calibration, even though it had been well under a year since I
owned it. But they did not address the issue I am seeing here.

So does anyone know why I might not be getting a good curve, and if there
is anything that can be done about it?

Thanks,
Dave

*Dave Tedeyan*
Senior Engineer | Taitem Engineering, PC

10 Verizon Lane | Lansing, NY 14882
o. *607.930.3481* x6  f. 607.277.2119
www.taitem.com

Solar • Sustainability • Energy • Design
B-Corporation Best for the World 2018 Honoree
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