variable speed AC well pumps [RE-wrenches]

matthew tritt solarone at charter.net
Thu Nov 21 20:44:01 PST 2002


David,

That would explain part of the problem. The other part has something to do
with an inverter running another inverter, or so I was told. But doesn't the
variable drive of the Grundfos use something in that order?

Matt
----- Original Message -----
From: "David Henry" <david at harmonyfarm.com>
To: <RE-wrenches at topica.com>
Sent: Thursday, November 21, 2002 5:49 PM
Subject: Re: variable speed AC well pumps [RE-wrenches]


> Matt,
>
> The variable speed pumps use a 1.5 or 2 hp motor and a variable
> frequency drive.
> At full pump output that's the HP your inverter has to run. Also an
> engineer at Franklin said they have a nasty ~7000 + watt surge when
> your first turn them on that charges some capacitors in the
> controller. After initial start up they have a soft start. I decided
> not risk it. Also they have poor efficiency at low volumes.
>
> David
>
> David Henry
> Harmony Farm Supply
> 3244 Hwy 116 N.
> Sebastopol, Ca 95472
> voice 707-823-9125 X14
> fax 707-823-1734
> david at harmonyfarm.com
> www.harmonyfarm.com
>
> >Allan,
> >
> >Hayes, but they might have dropped the 3/4 since the last time I put one
in.
> >They're pushing the variable speed, constant pressure pumps now. Very
> >expensive, and they don't believe that they will work with an inverter. I
> >don't see why not.
> >
> >Matt
> >----- Original Message -----
> >From: "Allan Sindelar" <allan at positiveenergysolar.com>
> >To: <RE-wrenches at topica.com>
> >Sent: Thursday, November 21, 2002 4:57 PM
> >Subject: Re: AC well pumps (Was outback fx2000 experience?) [RE-wrenches]
> >
> >
> >>  Matt,
> >>  I haven't seen a 3/4 hp conventional AC sub in 115VAC; 1/2hp is the
> >largest,
> >>  I thought. Who makes it?
> >>  Thanks.
> >>  Allan @+E
> >>
> >>  ----- Original Message -----
> >>  From: "matthew tritt" <solarone at charter.net>
> >>  I have installed several 115 volt sub
> >>  pumps using a single SineWave. These are available (through me!!) up
to
> >3/4
> >>  hp.
> >>
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