[RE-wrenches] low head/low cost solar pump

[David Katz]

Mac,
The cheapest pump to do this job is the LVM Amazon, which is made in England, will pump 3 or 4 GPM at 10 feet of head and costs around $70.  They are made to run on a 12 volt battery and cannot handle more than 14 volts, so a small battery and controller are required.  You can use a low cost regulator and a relay powered by the module to only run the pump when the sun is shining.

If you use a Surflo 2088, use the 24 volt version with a nominal 12 volt 36 cell module array direct.  This way the pump never sees too high of a voltage.  It will operate at 17 to 18 volts, pump slightly less then spec says at 24 volt, but since it is positive displacement it will pump fine at the low voltage.

David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dkatz at aeesolar.com
www.aeesolar.com
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From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of mac Lewis
Sent: Friday, February 24, 2012 7:50 AM
To: RE-wrenches
Subject: [RE-wrenches] low head/low cost solar pump

Hi wrenches,

I am looking for a relatively low cost solar pumping system.  The system has about 10 ft of elevation head and he just wants to water his garden which is about 200' away horizontally.  It can either be a submersible pump or a pump that can produce some suction.  Any experience with this?  Everything I've looked at thus far has been overkill and/or fairly expensive.

Thanks

--



Mac Lewis

"Yo solo sé que no sé nada." -Sócrates

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