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Open source wireless IV curve tracer for long term field testing
Wireless IV Curve Tracer for long term solar photovoltaic field testing
The hardware was designed and built as a personal project in an attempt to address the shortcomings of a traditional IV measurement setup. The hardware and software are open source. Jason's IV tracer has just two wires to connect to the panel under test. Other than that, it’s completely self-contained and portable. When the panel isn’t being measured, the logic circuitry is put to sleep and the panel’s power is instead used to charge a small lithium ion battery. Even in complete darkness, the IV tracer can run from the battery for a couple of weeks, and as soon as the sun comes out, the battery is quickly recharged.
The complete IV tracer cost me about $140 to build, which is a huge cost savings in addition to the time saved from not having to mess with miles of wiring if you are doing a complex site like the OSOTF.
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