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<p><font size="4">I talked to SolArk about the input amperage
limitation on a recent project. Someone correct me if I am
wrong, but SolArk does automatically limit excess amperage. We
were very close on the limit and it made no sense to me that
they would design something with parallel MPPT that limit one to
one string. In any case, I was informed by SolArk that they do
current limit when in excess of 18. Chris Warfel</font><br>
</p>
<div class="moz-cite-prefix">On 4/14/2022 1:00 PM, Darryl Thayer via
RE-wrenches wrote:<br>
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<blockquote type="cite"
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<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>
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<br>
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<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" moz-do-not-send="true"
class="moz-txt-link-freetext">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>
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<div>Ron Young</div>
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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" moz-do-not-send="true">Solareagle.com</a><br>
Alternative Energy Solutions ~ Renewable Energy Products<br>
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Christopher Warfel</font><br>
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