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Contact Square D, they\u2019ll send u a cut sheet.. QO is DC rated <br>
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<blockquote type="cite">On Oct 25, 2021, at 9:56 PM, Ray Walters <ray@solarray.com> wrote:<br>
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<p>I've got some old systems running the QO breakers at 48 v nominal, but the Voc of the array could be over 80. Never an issue, but I agree just swap out that load center, since its that old. Midnite has good stuff. If you're just running to a an FM80 or
similar with 150 v limit, their regular breakers are 150 vdc rated. I only use the 300 v rated breakers with the new FM 100 that can take 300 vdc.
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<p>Ray Walters<br>
Remote Solar<br>
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<div class="moz-cite-prefix">On 10/25/2021 6:45 PM, Chris Sparadeo wrote:<br>
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<div dir="auto">Hi Jeremy,</div>
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<div dir="auto">According to the QO cut sheet the answer is 48VDC:</div>
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<div dir="auto"><a href="https://download.schneider-electric.com/files?p_Doc_Ref=0730CT9801" moz-do-not-send="true" class="moz-txt-link-freetext">https://download.schneider-electric.com/files?p_Doc_Ref=0730CT9801</a></div>
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<div dir="auto">My guess is that your string voltage would be much greater than that. Not sure your exact application, but for the slight added cost, I would definitely suggest using a reputable NEMA3R combiner/disco with 300VDC breakers and throwing away the
ancient load center. </div>
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<div dir="ltr" class="gmail_attr">On Mon, Oct 25, 2021 at 8:30 PM Jeremy Rodriguez <<a href="mailto:allsolarjeremy@msn.com" moz-do-not-send="true" class="moz-txt-link-freetext">allsolarjeremy@msn.com</a>> wrote:<br>
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<div>Hello </div>
<div>Does anyone have a definitive answer to the DC rating of the QO circuit breakers? I\u2019ve got a potential client with an existing AC load center (>20 yrs) being used for his array combiner. </div>
<div>He\u2019s looking to add to the array, with modules that are higher voltage of course. </div>
<div>Thanks in advance. </div>
<br>
<div dir="ltr">Jeremy Rodriguez
<div>Solar Installation / <span style="font-size:13pt">Design Expert </span></div>
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<div>All Solar, Inc.
<div>1453 M St<br>
<div>Penrose Colorado 81240</div>
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<div>Sent by Jeremy's iPhone. Sorry for typos and shorthand. </div>
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