I agree with an earlier response…isn’t this a NABCEP PV Installation Professional-only forum? The original question is DC-string design 101. Jerry is spot on for coldest temp adjustments, RSD considerations if required. But selecting a home run wire for separate string inputs to the inverter??? How can this be asked here?
Ron, are you NABCEP PV Installation Pro certified? Scot Arey Owner, Solar CenTex From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of Jerry Shafer via RE-wrenches Sent: Tuesday, April 12, 2022 10:27 PM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Cc: Jerry Shafer <jerrysgarag...@gmail.com> Subject: Re: [RE-wrenches] Sol-Ark install Need more than this, we have amperage, we need distance, temp, # of wires per conduit, also at 480 you may want to verify cold temp for over the top voltage @ VOC, any RSD device(s) being used? Help to have total module count, as an example use a combiner to make 4 strings, 2 of equal voltage per input. For battery backup or off grid, Solark is the easiest you will get. Jerry NABCEP PV Inspector On Tue, Apr 12, 2022, 7:42 PM Ron Young via RE-wrenches <re-wrenches@lists.re-wrenches.org <mailto:re-wrenches@lists.re-wrenches.org> > wrote: Hi Wrenches, trying to wrap my head around a first time Sol-Ark install. Because the max DC voltage is 500v at 18a and the PV I’m using is 40v DC each I will have to create three strings each 480v. What would be the best choice for a home run wire? I’ve always used smaller strings with micro inverters, a combiner at the array and a single Teck home run cable but the string inverter presents a different scenario and it looks like I’ll need to use three home run cables, one for each string. Ron Young earthRight Products - Solareagle.com <http://Solareagle.com> Alternative Energy Solutions ~ Renewable Energy Products _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org <mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
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