Jay; Off grid we have worked through some strange requirements over the last few years, and in most it had a lot had to do with how electrical inspectors interpreted NEC....they are as puzzled as we are. There were AHJs calling for giant remote-trip DC breakers on battery banks to comply with rapid shutdown (I think that fire went out when it was pointed out that meant all backup generators needed to be integrated into rapid shutdown too, a no-go) And AHJs who said that because the conduit from a ground mount array went 4 feet up the outside of a building to the first disconnect before penetrating the building, that meant the PV array was "on the building." And local solar companies frantically pounding in 250.47(D) aux grounding electrodes below every PV array, even though that's a recipe for disaster.
I'd boil it down to keeping good lines of communication open between PV installers and the AHJs and being able to discuss frankly what exactly the problem some of these more mysterious code items are trying to solve. Dan Fink Former 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™ NABCEP PV Associate 970.672.4342 On Sat, Feb 2, 2019 at 4:33 PM jay <jay.pe...@gmail.com> wrote: > HI Dan and Kienan, > > Yea I understand some of the work arounds, but its not always possible to > work around things. At some point its going to be in a building or on the > roof etc. > > So sounds like from the crickets that things are not quite ready yet. > Better slow and ready than fast and not. > > thx > jay > > > > On Feb 2, 2019, at 12:47 PM, Dan Fink <danbo...@gmail.com> wrote: > > A very common way around rapid shutdown for off-grid systems especially > with ground or pole mounts is using a "power shed" for the BOS > components.....if it is not inhabited / uninhabitable then rapid shutdown > is not needed per NEC 2017. > > Dan Fink > Former 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™ > NABCEP PV Associate > > 970.672.4342 > > > > > On Sat, Feb 2, 2019 at 1:40 PM Kienan Maxfield <maxfieldso...@hotmail.com> > wrote: > >> Jay, >> >> I'm interested in this too, but I don't have any good answers (I was >> hoping that someone else would have responded by now). I know that this >> doesn't answer the question... but my only comment is to use a pole mount >> whenever possible. Rapid shutdown only applies to systems on a building or >> where the PV system conductors penetrate beyond 3' into a building before >> reaching the PV system disconnect. For a pole mount, as long as your >> equipment is on the outside wall, you can easily get to the PV system >> disconnect within 3' of wire length from the building penetration so no >> rapid shutdown of any kind is required. The battery system is considered a >> separate system in the 2017 code and there is no requirement for rapid >> shutdown of any kind in that system. >> >> Thanks, >> Kienan >> >> >> *Maxfield Solar* >> *maxfieldso...@hotmail.com* <maxfieldso...@hotmail.com> >> * (801) 477-0-SUN (477-0786) (801) 631-5584 (Cell) * >> ------------------------------ >> *From:* RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> on >> behalf of jay <jay.pe...@gmail.com> >> *Sent:* Wednesday, January 30, 2019 6:02 PM >> *To:* RE-wrenches >> *Subject:* [RE-wrenches] module level control for offgrid >> >> HI All, >> >> Well its the new year and Module level control is here. 690.12 (B)(2) >> >> Does anyone have any updates as to products that work with CC's that meet >> it? >> >> Thx >> jay >> >> Peltz Power >> >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> >> https://apc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&data=02%7C01%7C%7C5056c4841d184b864da108d6873edd73%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636845101401678181&sdata=ncjKwCiy%2BQbo0lqP7srSc8G9CryOtNQPjfhAKitodfc%3D&reserved=0 >> >> List-Archive: >> https://apc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2Fmaillist.html&data=02%7C01%7C%7C5056c4841d184b864da108d6873edd73%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636845101401688186&sdata=%2FZtDovZYOzIZrFwiwKDR2XqoZ2eXWvor6guHCz59j0c%3D&reserved=0 >> >> List rules & etiquette: >> >> https://apc01.safelinks.protection.outlook.com/?url=www.re-wrenches.org%2Fetiquette.htm&data=02%7C01%7C%7C5056c4841d184b864da108d6873edd73%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636845101401688186&sdata=sAk7k9sjTPsWc3wrtceu%2FHzgH%2BN97FtdD2HHG55KU0E%3D&reserved=0 >> >> Check out or update participant bios: >> >> https://apc01.safelinks.protection.outlook.com/?url=www.members.re-wrenches.org&data=02%7C01%7C%7C5056c4841d184b864da108d6873edd73%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636845101401688186&sdata=H5sD9UsXdk2dIZsOTsQdQLRWWPXKO1joqt3GQqLOuIA%3D&reserved=0 >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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