I know that IF the SMA SI master inverter is shut down then all follow, shunt trip breaker only for the master? Also look at the Midnite MNBCB 1000/50 (Previous Model Num: MNBCB-1000/50-Battery Combiner) MidNite 1000amp battery combiner box Includes a 1000amp Positive and Negative bus bar with 3/8 inch studs. On Aug 26, 2015, at 3:39 PM, Ray Walters wrote:
> Hi Wrenches; > > I have an upcoming project to be inspected, ,and having spent too much time > on off grid and out of country work, I'm now playing catch up with the new > 690.12 and 690.71(H) requirements. > The proposed GTB system is 3 Radians with a ground mounted 18kW array and > large HUP battery bank. I just read a Bill Brooks article that basically > says that Rapid Shutdown not only applies to ground mounted arrays that come > into buildings, but also applies to battery cables if longer than 5 ft. > There are 690.12 compliant combiners from Midnite that work with their > Birdhouse system, so I think I've got a handle on the array requirements > (more or less). > What is stumping me is how to feed three 8kW inverters from a large battery, > and install auto disconnect breakers within 5 ft. > 1) the disconnect has to be large enough, Midnite only makes a 250 amp remote > trip breaker, so I'd have to parallel 3 of these? > 2) 690.71(H)3 says the breaker can't be in the battery enclosure, which is > tricky since the enclosure is 160" long from one end to the other with 2 > parallel strings. > 3) I'm having trouble even finding an enclosure for 3 large DC breakers (Flex > 1000 is the only thing I know of) and to get the enclosure close enough is an > issue too. > I just got off the phone with Tech support at Outback and they don't seem to > have any Rapid Shutdown gear ready. > Are inspectors actually requiring this yet, or because of the lack of > available UL listed products, can we take a pass on at least some of the > requirements? Another strategy the Outback tech thought of is to put all the > equipment into a shipping container and then its not in or on a "building", > and 690.12 doesn't apply. > > -- > R.Ray Walters > CTO, Solarray, Inc > Nabcep Certified PV Installer, > Licensed Master Electrician > Solar Design Engineer > 303 505-8760 > > _______________________________________________ > 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 > > t...@swnl.net www.SWNL.net > Solarwinds Northernlights > Serving Mid Coast Maine & Northern California > 207-832-7574 Cl. 610-517-8401 > > Blair "TUMP" May > ******** MAINE'S CHARTER ******** > NABCEP "Certified PV Installer" > > ******** MAINE'S CHARTER ******** > Trace Xantrex "Certified" Dealer / Installer" >
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