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
