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Kirpal, Although I can't answer your IO101 question, I can tell you that the SQ Flex operates nicely for us when used with a pressure tank/ pressure switch. As long as the pump and PV power source are sized to accommodate the additional vertical lift caused by the tank pressure, all is good. As for the 2 current carrying conductors, that still fascinates me. When using 240 AC, the 2 phase wires from the grid are attached to the blue and brown wires from the pump. When switched over to the array, the DC positive and negative are attached to the same brown and blue wires but the polarity doesn't matter. It's all taken care of by the electronics in the pump. Takes a while to get used to that. And have you seen the documentation that comes with the pump and CU200? I'm embarrassed to include them in the customer's document package...they're all pictures and no text....sigh.... Roy Butler NABCEP Certified Solar PV Installer® NYSERDA eligible PV & wind installer PA Sunshine Program Approved PV Installer Four Winds Renewable Energy, LLC 8902 Route 46 Arkport, NY 14807 607-324-9747 www.four-winds-energy.com Although no trees were killed in the sending of this message, a large number of electrons were terribly inconvenienced. On 4/6/2011 4:55 PM, Kirpal Khalsa wrote: Hi all....so I have a pumping project using a grundfos SQ Flex pump....It will operate on the grid when grid is present and then switch back to solar ready if the grid power should fail.....here is the set up... |
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