<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
On 4/18/2012 4:41 PM, Darryl Thayer wrote:
<blockquote
cite="mid:1334792489.52885.YahooMailNeo@web39301.mail.mud.yahoo.com"
type="cite">
<div style="color: rgb(0, 0, 0); background-color: rgb(255, 255,
255); font-family: arial,helvetica,sans-serif; font-size: 12pt;">
<div><span>Bob do you know of a 4x80 GFDI breaker? Midnight has
a 2X80 correct? <br>
</span></div>
</div>
</blockquote>
<br>
<br>
No, but we have a 1 X 63 amp / 300 volt GFP that can be configured
as 2 X 63 amp GFP. <br>
<br>
boB<br>
<br>
<br>
<br>
<br>
<br>
<br>
<blockquote
cite="mid:1334792489.52885.YahooMailNeo@web39301.mail.mud.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:arial,
helvetica, sans-serif;font-size:12pt">
<div><span>and Outback has a 2X80 </span></div>
<div><span>Wire size use the tap rule, 10 feet 10% of wire size.
</span></div>
<div><br>
</div>
<div style="font-family: arial, helvetica, sans-serif;
font-size: 12pt;">
<div style="font-family: times new roman, new york, times,
serif; font-size: 12pt;">
<div dir="ltr"> <font face="Arial" size="2"> <b><span
style="font-weight: bold;">From:</span></b>
<a class="moz-txt-link-rfc2396E" href="mailto:boB@midnitesolar.com">"boB@midnitesolar.com"</a> <a class="moz-txt-link-rfc2396E" href="mailto:boB@midnitesolar.com"><boB@midnitesolar.com></a><br>
<b><span style="font-weight: bold;">To:</span></b>
RE-wrenches <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a> <br>
<b><span style="font-weight: bold;">Sent:</span></b>
Wednesday, April 18, 2012 5:08 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
Re: [RE-wrenches] GFP and multiple charge controllers<br>
</font> </div>
<br>
<div id="yiv406557911">
<div> <font face="Courier New, Courier, monospace"><br>
A lot of good replies have come by here but here goes
another one...<br>
<br>
The GFP cannot be used for dual purpose as a
disconnect for battery<br>
or PV input and y</font><font face="Courier New,
Courier, monospace"><span style="color: rgb(31, 73,
125);"><font color="#330033">ou</font> <font
color="#330033">are</font> <font color="#330033">not
allowed</font> <font color="#330033">to</font> <font
color="#330033">un-ground</font> <font
color="#330033">the system by turning<br>
off the DC input or output breaker.</font></span></font><br>
<font face="Courier New, Courier, monospace"><br>
4 AWG should be fine for 80 amps. If you need/want to
use smaller wire<br>
than that required for an 80 amp GFP, MidNite makes a
63 amp GFP.<br>
<br>
boB<br>
<br>
<br>
<br>
<br>
On 4/17/2012 6:42 PM, William Miller wrote:<br>
</font>
<blockquote type="cite"><font face="Courier New,
Courier, monospace"> Friends:<br>
<br>
Here is a related problem: If we use an 80 amp GFD
(ground fault detection) breaker, even for a very
small array, we have to use 3AWG CU wire from the
battery buss to the breaker and from the breaker to
the FM or MX60. This seems like a big hassle for 5
or 10 amps of charging. A variety of sizes of GFD
breakers would be helpful.<br>
<br>
Here is a bigger problem: GFD breakers don't really
work. All they do is turn off the charge function
in hopes that someone will find the problem. In the
meantime, the negative-to-ground bond is removed and
module mounting framework could be energized. PV
GFD breakers are completely different from standard
AC GFDI (ground fault detection and interruption)
receptacles and circuit breakers. The AC versions
interrupt power upstream, the PV versions interrupt
power <i>downstream</i> from the fault.<br>
<br>
See:
<a class="moz-txt-link-freetext" href="http://millersolar.com/MillerSolar/case_studies/ground_fauilt/_ground_fault.html">http://millersolar.com/MillerSolar/case_studies/ground_fauilt/_ground_fault.html</a>
for some musings on the subject.<br>
<br>
As they say on TV: "There had to be a better way!"<br>
<br>
William Miller<br>
<br>
<br>
<br>
At 05:54 PM 4/17/2012, Kent Osterberg wrote:</font>
<font face="Courier New, Courier, monospace"><br>
</font>
<blockquote class="yiv406557911cite" cite=""
type="cite"><font face="Courier New, Courier,
monospace">Nathan,<br>
<br>
I don't think anyone makes a 100-amp PV GFP. The
panel mount breaker model that's being used for
the PV GFP doesn't include a 100-amp breaker.</font>
<font face="Courier New, Courier, monospace"><br>
<br>
The Classic has a built-in GFP so you shouldn't
need an external GFP for it. You will need to add
a GFP for the FM60 - a single 80-amp GFP would
work.<br>
<br>
You can use the dual 80-amp GFP and shut down both
PV arrays at the same time if the GFP is wired to
disconnect the PV array from the charge controller
input. That's where Outback's instructions used to
show the GFP, and it is a better place for it than
on the charge controller output anyway. Midnite's
instructions show the GFP on the charge controller
input, but their 80-amp GFP is a single.<br>
<br>
</font>
<pre><font face="Courier New, Courier, monospace">Kent Osterberg
Blue Mountain Solar, Inc.
<a moz-do-not-send="true" href="http://www.bluemountainsolar.com" rel="nofollow" target="_blank">www.bluemountainsolar.com</a>
</font></pre>
<font face="Courier New, Courier, monospace"><br>
On 4/17/2012 11:08 AM, Nathan Stumpff wrote: <br>
</font>
<blockquote class="yiv406557911cite" cite=""
type="cite"><font face="Courier New, Courier,
monospace">Wrenches,<br>
<br>
In a job coming up I have a customer with an
existing FM60 controller, 520 watt (!!) array.
We are doing a ton of work, including adding a 4
kW solar array with Classic 150 charge
controller. I am trying to figure out how to
handle the GFP.<br>
<br>
For the Classic, I need a 90 or 100 A output
breaker minimum. 80 A is not an option. The
OutBack dual GFP is 80 A, and so it not an
option.<br>
<br>
Is there a 100 A GFP breaker assembly I have
just never seen? Is there a way to use the
Classic’s GFP to run an external relay via AUX
(to trip the FM60 output breaker at the same
time)? Any ideas?<br>
<br>
Thanks,<br>
-Nathan<br>
<br>
Nathan J. Stumpff - Arctic Sun, LLC<br>
NABCEP Ceritified PV Installer #091209-175<br>
<a moz-do-not-send="true"
href="mailto:nathan@arcticsun-llc.com"
rel="nofollow" target="_blank"
ymailto="mailto:nathan@arcticsun-llc.com">nathan@arcticsun-llc.com</a></font>
<font face="Courier New, Courier, monospace"><br>
Office: 907/457-1297<br>
</font> </blockquote>
<font face="Courier New, Courier, monospace">_________<br>
</font></blockquote>
<font face="Courier New, Courier, monospace">
<div> Voice :805-438-5600<br>
email: <a moz-do-not-send="true"
class="yiv406557911moz-txt-link-abbreviated"
href="mailto:william@millersolar.com"
rel="nofollow" target="_blank"
ymailto="mailto:william@millersolar.com">william@millersolar.com</a><br>
<a moz-do-not-send="true"
href="http://millersolar.com/" rel="nofollow"
target="_blank">http://millersolar.com<br>
</a>License No. C-10-773985<br>
</div>
</font></blockquote>
</div>
</div>
<br>
_______________________________________________<br>
List sponsored by Home Power magazine<br>
<br>
List Address: <a moz-do-not-send="true"
href="mailto:RE-wrenches@lists.re-wrenches.org"
ymailto="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Options & settings:<br>
<a moz-do-not-send="true"
href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org"
target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
List-Archive: <a moz-do-not-send="true"
href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org"
target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out participant bios:<br>
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><br>
<br>
<br>
<br>
</div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
List sponsored by Home Power magazine
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Options & settings:
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
List-Archive: <a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
</blockquote>
<br>
</body>
</html>