SQ and SQE application differences [RE-wrenches]

[Matt Tritt]

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Steve and others,

OK, I just called Grundfos about my thoughts on the possibility that the 
SQ and SQE might actually use about the SAME amount of energy to pump 
the same amount of water. I was wrong! The SQE actually uses_ less _!! 
The only difference is that the SQ (or any conventional pump) will 
consume a lot of power for short bursts, whereas the SQE power draw is 
proportional to the actual flow.

That said, the SQE should be fine in off-grid applications. Unless, of 
course, the battery bank is small and the leak is big.

Matt

Steve Willey wrote:

> SQ and SQ Flex are good and seem to run on mod square wave as you 
> point out. But isn't SQE designed to give constant pressure and avoid 
> a pressure tank by running (perhaps slowly) all the while water is 
> being used at any rate of flow?  I have understood that this would be 
> a very inefficient use of off-grid inverter power. Or is there a 
> different application for SQE it I am not familiar with?
>
>
>

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