As far as I know, the temperature coefficient holds true whether you are increasing or decreasing the temperature around the STC temperature of 25C. Of course, there is going to be a point at which it goes non-linear, but that is not stated.<br>
<br><div class="gmail_quote">On Tue, Nov 29, 2011 at 3:58 PM, Scott McCalmont <span dir="ltr"><<a href="mailto:re-wrenches@scottmccalmont.com">re-wrenches@scottmccalmont.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div style="word-wrap:break-word">Usually you increase the temperature above ambient by an amount which depends on the mounting method. Close to the roof is +35 degrees C, more than 6 inches above the roof is +30 degrees C, and pole or ground mount is +25 degrees C.<div>
<br></div><div>Scott<br><div><br><div><div><div></div><div class="h5"><div>On Nov 29, 2011, at 11:48 AM, Kirk Herander wrote:</div><br></div></div><blockquote type="cite"><span style="border-collapse:separate;font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><div lang="EN-US" link="blue" vlink="purple">
<div><div></div><div class="h5"><div><div style="margin-top:0in;margin-right:0in;margin-left:0in;margin-bottom:0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">I am in debate with a PE over calculation of low voltage of a series string on a hot day. He insists that an arbitrary high cell temp is factored in, not just ambient temperature. Could someone please give an accepted formula for this calculation? Thanks. I cannot find a clear reference to low voltage calculation on a hot day (but every reference material is clear on how to calculate high voltage on a cold day).<u></u><u></u></div>
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