[RE-wrenches] Grundfos SQFlex

[Ron @ earthRight Solar]

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