The wording in 690.12 B(2) , effective after Jan 1, 2019, says "The PV
System shall comply with one of the following:"
In none of the three subsequent paragraphs does it ref to "module level
shutdown." Paragraph 2 says gets inside the array voltage under 80 volts
within 30 seconds so I understand how that does not make a great article
headline.hence "module-level."
But I had a distributor that says they do not stock Fronius any longer
because it does not have a NEC 2017 solution.
But doesn't paragraph 1 ("comply with one of the following") and its
informational note provide a path to compliance as long as the string-level
RSD device is mounted within 1-foot of the array boundary?
How did "module-level" shutdown get taken as gospel truth??
I'm thinking a Fronius Primo with its RSD Quattro device mounted on an array
rail meets current 2017 code.
Howard "Scot" Arey
254-300-1228
scot.a...@solarcentex.com <mailto:scot.a...@solarcentex.com>
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