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Hi Dan;<br>
<br>
Yep, GFCIs an be a pain, but I really haven't had trouble in several
years. This is for a stand alone PV powered ATM machine, so it sees
a lot of public interaction. I wasn't keen on not having GFCI
protection. I was actually going to ask the list's opinion on this:
to GFCI or not to GFCI, that is the question. <br>
<img src="cid:part1.05020909.07030401@solarray.com" alt=""><br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
<div class="moz-cite-prefix">On 3/28/2016 5:21 PM, Dan Fink wrote:<br>
</div>
<blockquote
cite="mid:CAF+3LncD2ggh8SMAOU12CvPJb98GDk4D77t0078KMaSr-6C9qA@mail.gmail.com"
type="cite">
<div dir="ltr">Ray;
<div>I've even had problems with Magnums and Outbacks not
working with certain GFCI outlets.I usually just avoid
installing GFCIs in tiny, remote off-grid systems designed for
a specialty application with no electrical inspector involved
or required. GFCIs cause all kinds of mischief with equipment
and are a phantom load. I put them in the same league as
hard-wired 120VAC smoke detectors off the grid.</div>
<div><br>
</div>
<div>Exeltech inverters are certainly the most quiet RFI-wise,
but the low efficiency, $ and no-load draw are a bummer.</div>
<div><br>
</div>
<div>With William's application, I'd avoid the inverter entirely
and go DC, then you have no GFCI or AC codes. If the sat link
DC input specs allow 36VDC input, you have many off-the shelf
options available for a boost/buck power supply from 24VDC.
Digikey even.</div>
</div>
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<div><span
style="font-size:12.8000001907349px">Dan
Fink</span>
<div style="font-size:12.8000001907349px">Adjunct
Professor of Solar Energy Technology,
Ecotech Institute</div>
<div style="font-size:12.8000001907349px">IREC
Certified Instructor™ for: </div>
<div style="font-size:12.8000001907349px">~
PV Installation Professional</div>
<div style="font-size:12.8000001907349px">~
Small Wind Installer</div>
<div style="font-size:12.8000001907349px">Executive
Director, Buckville Energy</div>
<div style="font-size:12.8000001907349px">NABCEP
Registered Continuing Education Providers™<br>
<a moz-do-not-send="true"
href="tel:970.672.4342"
value="+19706724342"
style="color:rgb(17,85,204)"
target="_blank">970.672.4342</a></div>
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<div class="gmail_quote">On Mon, Mar 28, 2016 at 4:47 PM, Ray
Walters <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ray@solarray.com" target="_blank">ray@solarray.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> What about building a
30 vdc system (5 x 6v batteries in series) and adjust the
settings on a Midnite Classic to work with that? How
tight does the 30 vdc output need to be?<br>
<br>
On inverters, I've had trouble with the Suresine,
basically not working with GFCI outlets.<br>
I keep trying different models of GFCIs, but they keep
randomly tripping on 2 different systems. <br>
Morningstar's list of "approved" GFCIs doesn't list any
currently manufactured models, while calls to their tech
support yields "Oh, that shouldn't be a problem, it should
work with all GFCIs..."<br>
Way too many free trips out trying to fix this, so I may
have to abandon GFCI protection, or replace the
inverters. <br>
My suggestion for that small load: Exeltech 125. Better
than grid waveform, and I recently pulled one out of
corroded outdoor enclosure almost 15 years old: it looked
terrible, but was still working fine. It would also be
lower cost and fit in a smaller enclosure.<br>
<pre cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
<a moz-do-not-send="true" href="tel:303%20505-8760" value="+13035058760" target="_blank">303 505-8760</a></pre>
<div>
<div class="h5">
<div>On 3/28/2016 2:24 PM, Dan Fink wrote:<br>
</div>
</div>
</div>
<blockquote type="cite">
<div>
<div class="h5">
<div dir="ltr">Hi William;
<div>30VDC is kind of odd, but 36VDC is common.
The folks at Solar Converters might be able to
fix you up with a custom one, or perhaps 36V is
within the sat unit's input range.</div>
<div>As for the inverter, I've never gone wrong
with the Morningstar SureSine. Slick little
unit.<br>
<div class="gmail_extra"><br clear="all">
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<div dir="ltr">
<div>
<div dir="ltr">
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<div dir="ltr">
<div><span
style="font-size:12.8000001907349px">Dan
Fink</span>
<div
style="font-size:12.8000001907349px">Adjunct
Professor of Solar
Energy Technology,
Ecotech Institute</div>
<div
style="font-size:12.8000001907349px">IREC
Certified Instructor™
for: </div>
<div
style="font-size:12.8000001907349px">~
PV Installation
Professional</div>
<div
style="font-size:12.8000001907349px">~
Small Wind Installer</div>
<div
style="font-size:12.8000001907349px">Executive
Director, Buckville
Energy</div>
<div
style="font-size:12.8000001907349px">NABCEP
Registered Continuing
Education Providers™<br>
<a
moz-do-not-send="true"
href="tel:970.672.4342" value="+19706724342"
style="color:rgb(17,85,204)"
target="_blank">970.672.4342</a></div>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<div class="gmail_quote">On Mon, Mar 28, 2016
at 1:44 PM, William Miller <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:william@millersolar.com"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:william@millersolar.com">william@millersolar.com</a></a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div link="blue" vlink="purple"
lang="EN-US">
<div>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">Friends:</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">I
am designing a satellite data
interface for a large off-grid
system for a state highway
department facility. We will be
using the Outback Optics data
capabilities along with equipment
manufactured by Control by Web.</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">I’d
like to run the satellite system
on a battery power source so I can
hope to use it when we need it
most, when the power is down. We
have a separate 24 volt battery
bank remaining from a previous
generator control system. The
satellite system operates on 30
VDC at 2 amps.</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">My
first choice is to find a DC to DC
converter from nominal 24 volts.
Do any of you know of one that you
could recommend?</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">My
second choice is to use a small
inverter. Can anyone suggest one
at this small wattage? I don’t
know how good the power supply is
at rejecting waveform distortion
so I presume an inverter needs to
be somewhat close to a sine wave.<br>
<br>
</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">Thanks
in advance.</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif"">William
Miller</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><img
src="cid:part7.02030101.01080905@solarray.com" alt="Gradient Cap_mini"
height="28" width="64"><br>
Lic 773985<br>
<a moz-do-not-send="true"
href="http://www.millersolar.com/"
target="_blank">millersolar.com</a><br>
<a moz-do-not-send="true"
href="tel:805-438-5600"
value="+18054385600"
target="_blank">805-438-5600</a></span></p>
<p class="MsoNormal"> </p>
</div>
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