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<p class="MsoNormal"><b><span style="font-family:"Calibri","sans-serif";color:#1F497D">The C-40 does (or at least did) have Electronic Overcurrent Protection. According to the C-40 manual if the current exceeds 63 amps the overcurrent protection is activated.
The C-40 automatically resets the OCP every 10 minutes until the problem is corrected or stops. The OCP can also be reset manually by holding the reset switch down for 5 seconds.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Calibri","sans-serif";color:#1F497D">Steve<o:p></o:p></span></b></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:navy">Steve Bell</span></b><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:navy"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:navy">Technical Support Specialist
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:navy">SunWize Technologies, Inc.</span></b><span style="font-family:"Trebuchet MS","sans-serif";color:navy"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:navy"><a href="mailto:sbell@sunwize.com">sbell@sunwize.com</a></span><span style="font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:navy"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>Allan Sindelar<br>
<b>Sent:</b> Wednesday, October 24, 2012 4:45 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] C-40 question<o:p></o:p></span></p>
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<p class="MsoNormal">Wrenches,<br>
Sometimes I encounter a situation that I have never encountered, simply because it's so far beyond normal limits that I would never try it to find out what would happen. Here's one.<br>
<br>
A did-it-myself customer called me for batteries for his system. I learned he has a 12V system, with twelve 100 watt PV modules and a Xantrex C-40 controller. He has been using this for five years.<br>
<br>
Twelve 100W modules is around 80-90 amps - double or more the C-40's capacity. Assuming that what he told was accurate, why is the C-40 still working? Is it current-limited internally?<br>
<br>
By the way, since he had a 7,000 watt (yeah, right) 12V inverter from a truck stop, I encouraged him to buy a 24V inverter and rewire everything to 24V; then his C-40 would (just) work.<br>
<br>
Thanks, Allan<o:p></o:p></p>
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<p class="MsoNormal">-- <br>
<b>Allan Sindelar</b><br>
<span style="font-size:10.0pt"><a href="mailto:Allan@positiveenergysolar.com"><span style="color:#000099">Allan@positiveenergysolar.com</span></a></span><br>
<span style="font-size:10.0pt">NABCEP Certified Photovoltaic Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b><br>
3209 Richards Lane (note new address)<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span>
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