<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>Thank you Rob,<br>So instead of using specific weather data & temperature coefficients, they use one derate factor for the whole country? Is the system maximum voltage 600V?<br><br>I found the following from a presentation online, but no quick easy answer for my question:<br><br>Voltage Rating [50-006]<br>• 50-006 Voltage Rating of Photovoltaic<br>Source Circuits<br>Voc x 125%<br>• Rated open circuit voltage<br>• Temperature affects Voc of modules.<br>• Based on ambient temperature of -40°C.<br><br>Best,<br>Jerry Caldwell<br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight:
bold;">From:</span></b> Rob Harlan <mendosol@mcn.org><br><b><span style="font-weight: bold;">To:</span></b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b><span style="font-weight: bold;">Sent:</span></b> Monday, August 31, 2009 12:27:15 PM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [RE-wrenches] max PV voltage in Canada<br></font><br>
<title>Re: [RE-wrenches] max PV voltage in Canada</title>
<font face="Verdana, Helvetica, Arial"><span style="font-size: 12px;"><br>
Jerry,<br>
This might address what you are asking: <br>
Rule # 50-006 of the Canadian Electrical Code increases the voltage rating of the photovoltaic source circuit by 25% above the STC rated open circuit voltage. This would apply to the photovoltaic output circuits as well. <br>
Hope that helps,<br>
Rob<br>
Rob Harlan<br>
Executive Director<br>
Solar Energy Society of Canada<br>
Northern Alberta Chapter<br>
(780) 439-5608<br>
office@solatalberta.ca<br>
<br>
<br>
<br>
<br>
On 8/31/09 11:41 AM, "Jerry Caldwell" <solarcowboy@yahoo.com> wrote:<br>
<br>
<font color="#0000ff">> Dear Wrenches,<br>
> <br>
> Anyone know off the top of their head what the maximum PV array voltage is per <br>
> the Canadian Electric Code? Are there any published voltage restrictions for <br>
> behind the fence installations (for Ontario in particular)?<br>
> <br>
> Cheers,<br>
> Jerry Caldwell<br>
> <br>
> <br>
> <br>
> <br>
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