Contact Square D, they’ll send u a cut sheet.. QO is DC rated Sent from my iPhone
On Oct 25, 2021, at 9:56 PM, Ray Walters <r...@solarray.com> wrote: 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. Ray Walters Remote Solar On 10/25/2021 6:45 PM, Chris Sparadeo wrote: Hi Jeremy, According to the QO cut sheet the answer is 48VDC: https://download.schneider-electric.com/files?p_Doc_Ref=0730CT9801 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. On Mon, Oct 25, 2021 at 8:30 PM Jeremy Rodriguez <allsolarjer...@msn.com<mailto:allsolarjer...@msn.com>> wrote: Hello Does anyone have a definitive answer to the DC rating of the QO circuit breakers? I’ve got a potential client with an existing AC load center (>20 yrs) being used for his array combiner. He’s looking to add to the array, with modules that are higher voltage of course. Thanks in advance. Jeremy Rodriguez Solar Installation / Design Expert All Solar, Inc. 1453 M St Penrose Colorado 81240 Sent by Jeremy's iPhone. Sorry for typos and shorthand. _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org -- Chris Sparadeo C_802-369-4458 H_802-728-3059 _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
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