Ron, Brian's advice is sound. 240 vac is fine for the pump and the CU 200. The SQ series is rated 90-300 v AC and 30-300 v DC, although the pump is happiest at around 90 v and up. If the CU200 is already in the system and paid for, keep it: the diagnostics are nice, and the signal circuit is nicer: without it you must independently control the AC input. Allan Sindelar a...@sindelarsolar.com
> On Oct 20, 2014, at 8:34 PM, Brian Teitelbaum <bteitelb...@aeesolar.com> > wrote: > > Hi Jay, > > You are correct about the CU-200. It has an operating voltage range of > 30-300 VDC and 90-240 VAC. > > However, the IO-101 transfer switch is another story, and I think that is > what Ron meant. Up until recently Grundfos was only importing the 120 VAC > version of the IO-101, but now you can get the 240 VAC version here also > (it's basically the European 230 VAC model). > > One thing to note though with the IO-101 is that its max DC voltage is only > 225 VDC (even though the pumps and CU-200 are good for 300 VDC), so make > sure the PV array it's connected to is below that. > > Brian > AEE Solar > > -----Original Message----- > From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On > Behalf Of jay peltz > Sent: Monday, October 20, 2014 6:37 PM > To: RE-wrenches > Subject: Re: [RE-wrenches] Grundfos SQFlex > > Hi Ron > > Where did you read that the CU 200 is only good for 120vac. The manual I see > shows 240vac 50/60hz? > > Jay > Peltz power. > > > > >> On Oct 20, 2014, at 6:21 PM, "Ron @ earthRight Solar" >> <solarea...@solareagle.com> wrote: >> >> Hello water pumping Wrenches, I have a customer who has a Grundfos SQFlex >> 11 pump and he is getting connected to the grid. He will still have his >> battery back up charged by PV and wants to look at the most efficient way >> to operate the pump. It seems to me that neither the IO101 or the CU200 >> really is needed and he could just wire directly to the inverter output at >> 240v via a pressure switch on a standard pressure tank for most efficient >> operation. Although this doesn’t give any access to the Grundfos built in >> diagnostics that display on the CU200. >> >> Would you recommend keeping a CU200 in the system or is it overkill? With >> the CU200 the max voltage is 120 whereas without it I can go with 240v and >> a more efficient operation… unless I am missing something. >> >> Ron Young >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> 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 >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> > _______________________________________________ > List sponsored by Redwood Alliance > > 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 > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > _______________________________________________ > List sponsored by Redwood Alliance > > 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 > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > _______________________________________________ List sponsored by Redwood Alliance 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 List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org