Hi Will, Yes I'm sure AHJ's will be all over the place for a while here in Colorado. To clarify, is this a manual disconnect in the attic? If so, that is really missing the whole idea of a rapid shutdown.
Thanks On Wed, Aug 27, 2014 at 7:47 AM, Will White <william.wh...@rgsenergy.com> wrote: > Our experience in MA with rapid shutdown unfortunately varies with AHJ. > Some are letting us put an Eaton NEMA 4 disconnect on the roof next to the > array. Some are letting us put a disconnect in an accessible attic within > 5’ of the penetration. Some are requiring the Midnight Birdhouse remote > switch which is expensive. > > > > Rapid shutdown doesn’t apply to pole or ground mounts. > > > > Hope this helps. > > > > Will > > > > *Will White* > Operations Manager - New England > > RGS Energy > > 64 Main St. |Montpelier, VT 05602 > tel 802.223.7804 | mobile 802.234.3167 | fax 802.223.8980 > > *RGSEnergy.com <http://www.rgsenergy.com/> **| > william.wh...@rgsenergy.com <william.wh...@rgsenergy.com> * > > *Confidentiality Note: *This e-mail message may contain confidential or > legally privileged information and is intended only for the use of the > intended recipient(s). Any unauthorized disclosure, dissemination, > distribution, copying or the taking of any action in reliance on the > information herein is prohibited. E-mails are not secure and cannot be > guaranteed to be error free as they can be intercepted, amended, or contain > viruses. Anyone who communicates with us by e-mail is deemed to have > accepted these risks. RGS Energy is not responsible for errors or omissions > in this message and denies any responsibility for any damage arising from > the use of e-mail. Any opinion and other statement contained in this > message and any attachment are solely those of the author and do not > necessarily represent those of the company. > > > > > > > > > > *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On > Behalf Of *Mac Lewis > *Sent:* Wednesday, August 27, 2014 8:32 AM > *To:* RE-wrenches > *Subject:* [RE-wrenches] Rapid shutdown questions > > > > Hello wrenches, > > > > I am still trying to wrap my head around how to comply with rapid shutdown > in off-grid and hybrid situations. I've got a few questions that maybe you > can help with. > > > > 1. What is a (currently listed) rapid shutdown system that will > accommodate 8 strings? I know I can do this with Midnite combiners but as > I understand these aren't listed yet. > > 2. On a remote pole mount, does rapid shutdown apply? If the intent is > to isolate a safe zone around an array for fire fighting, it seems as > though a standard pole mounted DC disconnect can cover this concern. > > 3. I estimate on a typical hybrid installation, rapid shutdown will cost > at least $3000 to implement. This includes remote shunt trip battery > breakers, contactors on PV side of charge controller and roof combiners, > and running control cable from remote disconnect to all locations. As of > now, this would also require me to modify listed interconnection equipment. > Is this what others are finding? > > 4. AC coupling with microinverters may be the easiest way to comply with > most of these requirements. However, this doesn't seem like a great > alternative to the standard charge controller installation in an off-grid > system. > > > > Thanks in advance for your thoughts > > > > > > -- > > > > > > > > Mac Lewis > > "Yo solo sé que no sé nada." *-Sócrates* > > _______________________________________________ > 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 > > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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