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Kirpal,<br>
I believe that the IO101 is only designed to accept 120VAC, not 240.
The supplied AC pigtail is 15A 120V, and it uses a contactor, which
would be a specific voltage only. Unless I'm mistaken, you don't
want to supply 220 (240) VAC.<br>
<br>
I don't have answers for your other questions.<br>
Allan<br>
<br>
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<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a href="mailto:Allan@positiveenergysolar.com"><font
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<span style="font-size: 10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
<b>Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
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On 4/6/2011 2:55 PM, Kirpal Khalsa wrote:
<blockquote
cite="mid:BANLkTin958JiVuHJu8MUsae7i5tFOCfPjQ@mail.gmail.com"
type="cite">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...<br>
5-Sanyo HIT 220's Vmp non temp adjusted is 213VDC<br>
Pump is SQFlex 16 SQF-10 will have CU 200 controller and IO101 AC
input box....<br>
<br>
System has a pressure tank and pressure switch which will be used
instead of float switch as there is no storage tank at or above
ground level....<br>
This system is a retrofit project to an existing well pumping
system......<br>
Here is my questions:<br>
1. Pump and CU 200 controller are rated for upto 300VDC but IO 101
Controller is only rated for 225VDC.....is that open circuit or
max power on the modules....<br>
2. The Grundfos wiring diagrams only show 2 wires and a ground
leaving the IO101 going to the CU200.....What is happening when
there is 240VAC supplying the system and what happens when it
switches back to DC how is the power transmitted on those wires?
What happens to the second leg of the 240VAC generator/grid input?<br>
3. Has anyone done one of these Grundos SQFlex back up water
pumping systems connected to a pressure tank and did it operate as
expected?<br>
Grundfos does not offer tech support.......that is kind of a
bummer....<br>
Thanks for any advice or help....<br>
<br clear="all">
<br>
--<br>
Sunny Regards,<br>
Kirpal Khalsa<br>
NABCEP Certified Solar PV Installer<br>
Renewable Energy Systems<br>
<a moz-do-not-send="true" href="http://www.oregonsolarworks.com">www.oregonsolarworks.com</a><br>
541-218-0201 m<br>
541-592-3958 o<br>
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