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<p>All great questions. Sounds like the battery voltage is below
set-point (29V) using the heat gun</p>
<p>which is the thing to do to drag its V down. The Kid should have
gone back to MPPT (Bulk, Float or EQ) in a few moments</p>
<p>after doing that.</p>
<p>The sanity check for tracking is to note the Voc (105V), which
you did... Then note the PV input voltage</p>
<p>while the CC is in MPPT mode. The input voltage should be
somewhere between around 75% to 83%</p>
<p>of that Voc. If it is higher than that (87V for 105V Voc) then
the CC is trying to reduce its output current</p>
<p>for some reason... Either it thinks the battery voltage is above
set-point voltage (battery temperature compensation?),</p>
<p>or is current limiting (not in your case)... OR, maybe the Kid
is over temperature and is throttling back its output ?</p>
<p>You swapped in another Kid so that is probably not it. <br>
</p>
<p>If the input voltage is below the set-point voltage, (less than a
out 77 volts), then that is an indication of either</p>
<p>a shaded panel (not the issue it would seem) or maybe a bad panel
or high resistance connection or something else.</p>
<p>If the PV input voltage is where it should be (between around 80
volts), then the array is putting out as much as it can</p>
<p>in the present conditions. So if that is the case, or the PV
voltage is below max power point (< ~77V), then I</p>
<p>would check for bad connections or current limiting from the PV
array by short circuiting the PV array and measuring</p>
<p>the current with a clamp on meter or whatever you have. Make
sure to turn off or disconnect one of the PV wires</p>
<p>from the Kid input when doing that. If you measure much lower
than you expect for that array then you've more</p>
<p>than likely got a bad connection in the array or wiring down on
the ground in the BOS box or PV breaker maybe.</p>
<p>Keep us posted.</p>
<p>Thanks,</p>
<p>boB Gudgel</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 6/20/2018 7:54 AM, Tump wrote:<br>
</div>
<blockquote type="cite"
cite="mid:DEA9C1BA-94A4-4C9E-B096-22FC2A84EE5C@swnl.net">
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Are your batteries fully charged? FLA batts?, check w/ a
refractometer or set the Kid to EQ. T
<div class="">Also check/cycle the combiner box breakers to off
then on as they are center trip breakers and putting the cover
on sometimes can trip them. Also while in the combiner box check
for individual polarity and V/I. T<br class="">
<div>
<blockquote type="cite" class="">
<div class="">On Jun 20, 2018, at 8:06 AM, <a
href="mailto:glenn.burt@glbcc.com" class=""
moz-do-not-send="true">glenn.burt@glbcc.com</a> wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div style="margin-bottom:45px" class="">
<div style="font-size: 10pt;" class="">
<div dir="auto" class="">Have you got another
manufacturer's cc you could swap in temporarily?</div>
<div dir="auto" class=""><br class="">
</div>
<div dir="auto" class="">Do you have a load on the
batteries?</div>
<div dir="auto" class=""><br class="">
</div>
<div class="">
<div dir="auto" font-size:9pt;"="" class="">Sent
from my 'smart' phone so please excuse spelling
and typos.</div>
</div>
</div>
<div style="font-size: 10pt;" class="">
<div id="LGEmailHeader" dir="auto" class="">
<div dir="auto" class=""><br class="">
</div>
<div dir="auto" class="">------ Original
message------</div>
<div dir="auto" class=""><b class="">From: </b>frenergy<frenergy@psln.com
class=""></frenergy@psln.com></div>
<div dir="auto" class=""><b class="">Date: </b>Wed,
Jun 20, 2018 12:51 AM</div>
<div dir="auto" class=""><b class="">To: </b><a
href="mailto:re-wrenches@lists.re-wrenches.org"
class="" moz-do-not-send="true">re-wrenches@lists.re-wrenches.org</a>;</div>
<div dir="auto" class=""><b class="">Cc: </b></div>
<div dir="auto" class=""><b class="">Subject:</b>[RE-wrenches]
Low output</div>
<div dir="auto" class=""><br class="">
</div>
</div>
<pre class="">Off-gridders,
Small 24 volt off-grid install.....new installation, 3, 285
watt PVs in series, 4, L-16's in series, Midnight "Kid" CC. Problem: I
cannot get more than about 200 watts (8-9 amps battery side) out of the
Kid display in full noon sun, clean PVs. Should be 700 watts plus and
about 28 amps. Bulk/Absorb set at 29V, battery voltage at ~25 V (pulled
down with a heat gun). I changed that Kid out for another new one> Same
issue! I disconnected the PV wires where they land in the Kid and got
9.3 amps short circuit, 105 volts oc Called Midnight tech support but
we couldn't come up with a good solution. Ideas?
Thx,
Bill
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA <a href="tel:95983530.284.7849" class="" moz-do-not-send="true">95983
530.284.7849</a>
CA Lic 874049
<a href="http://www.frenergy.net/" class="" moz-do-not-send="true">www.frenergy.net</a>
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