Oddball backyard water pumping project [RE-wrenches]

[Allan Sindelar]

The Solar Force will run on either batteries or PV-direct. However, being a
positive displacement design, it's limited to about 9 gpm. For that desired
head and flow the SunCentric (formerly Solar Centrifugal) would be a better
choice.

Re running until 10 pm: tell him to move well north; then he'll have
sunlight until 10 pm in the summer. Barring that, no simple alternative to
batteries, timers, controls, etc. that I would know. As a selling point, you
might mention the way-sexy-cool feature of having the water wheel stop and
go as clouds pass in front of the sun on lovely Spring days. That has a much
greater impress-the-neighbors quotient than running at night, imho.

Allan @+NRG

----- Original Message ----- 
From: "Kurt Albershardt" <info at es-ee.com>
>
> We upgraded a system feeding a waterfall with a Solar Force piston pump
and 5x Siemens SP75 panels.  Pretty much everything else the original
installer sold them was replaced or upgraded: inverter powered AC fountain
pump replaced with a 12V Oasis, installed a DC timer and QO load center for
all the DC.  C40 and the L16s died about a year later, so we put in an MPPT
charge controller and large stack of AGM cells.  Inverter is still there on
a manual switch in case they need to run a power tool
> out there.  Still running after ~6 years now.
>
>
> --On Wednesday, January 09, 2008 1:00 PM -0800 Joel Davidson
<joel.davidson at sbcglobal.net> wrote:
>
> >
> > Wrenches,
> > A neighbor is putting in a shallow decorative pond with a wooden water
wheel. He wants to pump water (100 gpm but I think that is way too much)
from the pond up 7 feet to turn the water wheel. Yes, I know that this is
not the best use for power, but the world would be a sadder place without
fountains, ponds, and water decorations. Instead of utility power I
suggested using a solar powered DC direct drive pump, but he wants the water
wheel to turn until 10pm. Any suggestions would be most
> welcome. Thanks in advance.
> > Joel Davidson


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