Hi Dan, You can use a Santon Arc fault detection unit. This has arc detection and some low voltage contacts to drive power relays in case of an arc fault. You need to provide a power supply and the power contactors. You can buy all of the stuff on the website: http://www.dcsunvolt.com/ It turns out to be expensive and it may make more sense to upgrade charge controllers. Maybe there is a cheaper way, but I haven't ran across it.
Thanks On Sun, Aug 28, 2016 at 6:35 AM, Dan Fink <[email protected]> wrote: > Esteemed Wrenches; > > How are folks here dealing with NEC 690.11 AFCI PV DC requirements on > ground-mount, off-grid and multimode systems? My client purchased his > equipment for 2 systems prior to 2013, when Colorado started enforcing > 690.11 in the NEC 2011 code and we haven't done the installs yet due to > construction delays; they just got their CO a month ago. > > His grid-tie battery backup system has 3 Morningstar MPPT-60 600Voc > controllers, and his off-grid system 2 Morningstar MPPT-60 150Voc > controllers. > > I've been out of the loop on this one for a couple years since I've been > installing all Midnite Classics that have AFCI built in. I'm not seeing any > options for in the combiner box from my regular suppliers of breakers and > such (he already has the combiner boxes). > > 690.12 is also going to be an issue now that Colorado is enforcing it for > ground mount arrays. The Midnite combiners he bought in 2013 are not > compatible with the Birdhouse. > > Perhaps installation will be delayed further, and 690.12 will be waived > for ground mount arrays in NEC 2017? I can only hope. > > Any input appreciated. > > Dan Fink > Adjunct Professor of Solar Energy Technology, Ecotech Institute > IREC Certified Instructor™ for: > ~ PV Installation Professional > ~ Small Wind Installer > Executive Director, Buckville Energy > NABCEP Registered Continuing Education Providers™ > 970.672.4342 > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/[email protected]. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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