Rapid Shutdown has traditionally meant putting module level power electronics in the array for PV systems on buildings. There has always been this part of the NEC 690.12(B)(2)(1) that gave you an option to comply with rapid shutdown inside the array with a listed hazard control system. Surprisingly, we can now go back to having something to what rapid shutdown used to be in the 2014 NEC, which we called array level rapid shutdown. Let’s see if someone gets something like this listed for a residential roof.

Links:

https://www.sma-america.com/newsroom/current-news/news-details/news/5123-sma-america-and-sollega-partner-to-debut-the-first-ul-3741-pvhcs-certified-commercial-and-indus.html

https://files.ironridge.com/flat-roof-mounting/resources/brochures/IronRidge_BX_System_UL3741_Installation_Addendum.pdf

https://solarbuildermag.com/featured/ul-3741-rooftop-pv-system-complies-with-nec-690-12-without-mlpe/

To see a visual version, take these classes at www.HeatSpring.com/sean 

40-Hour NABCEP Advanced PV Certification Training and CEUS

30-Hour NABCEP Advanced PV Certification Training and CEUS

2020 NEC PV, Energy Storage, Building and Fire Codes for PV System Inspectors