<div dir="ltr"><div class="gmail_default" style="font-family:times new roman,serif;font-size:large">Hi, Ron, Yes, you must be careful of the MPPT inputs. You state Sol-Ark has an 18 amp max input, meaning you can not have more than 1 string supplying an MPPT if your 60 cell modules are 10 amps Isc. You state Sol-Ark has a maximum voltage per MPPT of 500 volts, this voltage is <u>not Voc x number of modules.</u> The Voc must be temperature corrected. find the lowest temperature for your region, check code book 690.7a table and there is a table of temperature correction factors, use these factors to correct Voc at STC to Voc at your lowest temperature. For example if your lowest temp is -10 F the code says (x1.2) so your 40 volts becomes 40 x 1.2 = 48 volts and the max number of modules is 10 per string</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 12, 2022 at 9:42 PM Ron Young via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>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\u2019m 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\u2019ve 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\u2019ll need to use three home run cables, one for each string. <div><br></div><div>Ron Young</div><div><br></div><div><div style="color:rgb(0,0,0);font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">earthRight Products - <a href="http://Solareagle.com" target="_blank">Solareagle.com</a><br>Alternative Energy Solutions ~ Renewable Energy Products<br><br><br></div></div></div>_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a href="http://re-wrenches.org" rel="noreferrer" target="_blank">http://re-wrenches.org</a><br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
There are two list archives for searching. When one doesn't work, try the other:<br>
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noreferrer" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer" target="_blank">http://www.members.re-wrenches.org</a><br>
<br>
</blockquote></div>