Hi Wrenches,
I'm hoping you can help me out with some collective wisdom and advice on
pump recommendations for off-grid direct solar water pumping systems that
would be suitable in a developing world context. We're looking for
submersible pumps that can deliver up to 30 cubic meters per day (8000
HI Allan;
Here's a relay I've used for electric vehicles with up to 156 vdc nom.
batteries. (pushing 200 vdc charging on cold days)
http://store.kta-ev.com/openstylepowerrelaydpdtwithmagneticblowout.aspx
Click on the spec sheet for more details.
This is from KTA electric vehicles, a very reputa
Allan,
General purpose relays seem to be rated for 30 volts dc.
Here are a couple possibilities for a dc relay that will handle the PV
power:
Panasonic AEP51012 (Mechanical relay - very expensive and difficult to
get)
Crydom D2D12
or D2D40 (Solid state relays)
It looks like the D2D40 will hand
HI Allan,
I suggest you use Solid State relays.
They come in 12v power voltage and up to 300VDC switched voltage, no arcs, low
power draw and more reliable than mechanical relays, just make sure you use a
good heat sink.
jay
peltzpower
On Jul 9, 2011, at 7:26 AM, Allan Sindelar wrote:
> Phil
Fastenal has some decent ones. I bought one earlier the season and
it seams good. You can call your local supplier or go on line.
Try part numbers 0200940, 0258034, or 0267233
At 09:01 AM 7/8/2011, you wrote:
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Phil and Wrenches,
Thank you for the response; good food for thought.
We looked at Aerovironment as a result of your suggestion, but it
appears to be out of production and unavailable.
Kent's suggestion to use the gennie starting battery also makes
sense,
Can individuals take a Fed ITC on a SHW system installed on a second home
property?
David Palumbo
Independent Power LLC
462 Solar Way Drive
Hyde Park, VT 05655
www.independentpowerllc.com
NABCEP Certified PV Installer
Vermont Solar Partner
23 Years Experience, (802) 888-7194
_
Dan,
I'm confused. You wrote:
"I'm measuring 125vac RMS off the honda 3000i, Hz is around
2.2khz (ripple I assumenot a fancy DC clamp meter, Tenma, as it can
be dunked in the river at any time during transport -- 2 mile canoe
trip, then 4 mile backpack trip to the site, after the 150 mile
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