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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