1.5 HP well pump [RE-wrenches]

[bbassett at rockisland.com]

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I doubt that the SQ or SQE were specifically designed to run on inverter 
or generator power, but they happen to do so OK. The difference between 
the two is that the SQE has communications ability with the motor. This 
allows it to be used in a variable speed setup, but it can also just be 
used in the same manner as an SQ at full speed. In that use it will also 
run on a mod-square wave inverter, indeed I did run a very early one for 
a few hours on a Trace U2512 just to see. I have not tried using the SQE 
with a mod-square wave inverter in variable speed mode though. My 
experience indicates that the SQ and SQE pumps fall somewhere between 
std AC pumps and the SQFlex in efficiency, probably closer to the AC 
pumps.

Brad
AEE 


Matt Tritt wrote:
> 
> Todd,
> 
> The SQE is a variable-speed, constant pressure pump, whereas the SQ is 
> designed to run on generator and inverter power (that's why the lurking 
> Brian T. pointed out to the Head Solar Bozo that he owed him his dinner.
> 
> Matt T
> 
> Todd Cory, Mt. Shasta Energy Services wrote:
> 

> > This might be a dumb question but what is the difference between a SQ 
> > and a SQE?
> >
> > Todd
> >
> > Brian Teitelbaum wrote:
> >
> >> Windy,
> >>
> >> Thanks for the expertly detailed explanation on sub-pump motor 
> >> technology.
> >>
> >> But you might owe me dinner! I have customers that run Grundfos SQ AC 
> >> pumps
> >> on DR's with no problem. I'm sure that the efficiency is way lower 
> >> then it
> >> would be with sine-wave power, but it still works fine. Most households
> >> don't use enough water for the efficiency to be a big issue.
> >>
> >> However, I don't know anyone who has tried the SQE on mod-square (let's
> >> start calling it what it is!). My guess is that it wouldn't work very 
> >> well
> >> at variable speeds, but I don't know for sure. If someone out there has
> >> tried the SQE, let us know.
> >>
> >> Cheers,
> >>
> >> Brian Teitelbaum
> >> AEE Solar
> >>  

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