In my last post, I mentioned the PID effect, which significantly decreases photovoltaic arrays’ performance. Now, I want to show how PID can be diagnosed using a few different analysis methods. As discussed in my last post on this topic, outdoor electroluminescence analysis is the best way to detect the PID effect. This method lets […]
Read articlePotential-induced degradation (PID) of photovoltaic panels
Potential induced degradation affects many solar power arrays by reducing panel performance more and more over time. Although some types of PID are reversible, others are not, and those are therefore a permanent problem for the affected modules. This article describes the causes of PID, how to detect it, and how to prevent it. All […]
Read articlepvServe – a service power supply for the photovoltaics industry
The first reverse current testing of solar modules took place some years ago during IEC tests on solar modules. It requires a voltage greater than the module’s no-load voltage to be applied to the module’s terminals. The module then behaves like a circuit with 60 or 72 diodes in series (depending on how many cells […]
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