HI Scot, I”ve pretty cavalier on lots of things. But for this, I would use conduit and wire. I just think the added protection, being able to pull out wire in case etc.
I do like the armored cable that was discussed, but that stuff is expensive and the ends are quite expensive. I buy my cable from Bryan at PV cables, you might give him a call for pricing. Jay peltz power > On May 17, 2016, at 3:52 PM, Howard Arey <scot.a...@solarcentex.com> wrote: > > Good day, wrenches. > > I am installing four dual axis trackers totaling 52KW (13KW per) to four > individual Fronius Primo 12.5 Primo’s. We’ve done this setup before except > this time, we’ll mount the inverter at the meter instead of carrying > inverting at the tracker and carrying 240 volt over a 300+ foot ground run > for the four combined trackers. And to the heart of this question, we’ll run > under 1,000 volt rules for this commercial ranch setup. Goal is to user > higher voltages and minimize amps running through conductors. > > So my project is: > > 4 each 13KW trackers > Each tracker is 3 strings of 14 modules and about 705Voc and 520 Vmp. This > combined 3-string output for each tracker will have Isc of 8.89 x 3 = apc 27 > amps > We’ll pull each set of tracker conductors (4 trackers, plus one more run for > a 5th tracker) so 10 +/- conductors. I’ve done the necessary conditions of > use derates. > > The big question is what would you select as this 1,000 volt rated wire for > conduit covered installation? PV Wire will get mighty expensive and I don’t > even know if I’ll find in 4AWG. > > I ran into this one time before and we just did multiple strings to keep in > the 600volt category but I don’t want to do here because that means I double > the number of conductors (and go from 3200 to 6400 feet of wire…String math > and MPP ranges keep me at strings of 14. > > I want to centrally mount the inverters instead of one at each tracker for > looks and reduce 240 wire sizing. > > What type cable would you use? > > Howard “Scot” Arey > Owner, Solar CenTex > 254-300-1228 > scot.a...@solarcentex.com <mailto:scot.a...@solarcentex.com> > > www.solarcentex.com <http://www.solarcentex.com/> > https://www.facebook.com/SolarCentex <https://www.facebook.com/SolarCentex> > http://www.solarreviews.com/installers/solar-centex-reviews/ > <http://www.solarreviews.com/installers/solar-centex-reviews/> >
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