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How to deal with fake labels on photovoltaic panels

Start your verification process like a quality control expert - examine the panel's backsheet where 87% of manufacturers place identification markers. Look for these critical elements: Here's a field technician's secret: spray distilled water on the label. How do genuine. . The NEC690 Building Inspector's Guide is a set of reference materials developed for Building Inspectors and AHJ Officials as it relates to Article 690, of the National Electrical Code (NEC 2014) for Photovoltaic Warning Labels. The Guide also covers ANSI Z535. Typically, these run on less than 10V dc and draw only a fraction of an ampere.