https://www.solarpowerworldonline.com/2024/08/why-solar-racking-is-chasing-ul-3741-compliance/ Covering the world of solar power technology, development and installation. Thu, 22 Aug 2024 00:37:58 +0000 hourly 1 https://wordpress.org/?v=6.6.1 https://www.solarpowerworldonline.com/2024/08/why-solar-racking-is-chasing-ul-3741-compliance/#comment-146775 Thu, 22 Aug 2024 00:37:58 +0000 https://www.solarpowerworldonline.com/?p=106952#comment-146775 I appreciate Yann’s quote “as an industry we need to do better”. An example of this can be seen in the second picture with the Sollega and SMA equipment which is an excellent example of a non-compliant system, due to lack of understanding at both the manufacturer, NRTL, AHJ, and manufacturer level. The DC array wires visible between the inverter and the array aren’t protected. If a fire fighter were to fall in that location and damage the wires or connectors they would be in contact with deadly voltage and grounded metal parts to complete the circuit. UL 3741 will need urgent revisions, NRTLs will need better training, and manufacturers will need add more protection for these systems to adequately provide a layer of safety for first responders.

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