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Solar- Docmirror (others)

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banjoman09

Well-known Member
Okay- per your advice- I have listed everything I need with two things I need help figuring out; one- panel number? There are so many, and is it "freestanding" or come with a frame/bracket? The second - a battery number? Also so many on "batteryplus" website. The pump I found is $240.00....sound okay? Thanks again!
 
This doesn't answer your specific questions, but I have seen those portable set out suitcase style solar panels in typical 100 or maybe 120 Watt capacity often equipped with an onboard PWM Solar Charge Controller. If equipped with the light aluminum folding frame they are soooooooooo easy to set up and point toward the most direct sunlight. As far as battery, I suggest using true deep cycle (may require two 6 volters in series such as the classic Trojan T-105 Golf Cart Battery) NOT a cheaper so called RV/Marine quasi deep cycle like sold at Walmart, although sure they still work fine and are more affordable. The answer depends on how much power the pump requires and how much sunlight you can harvest so we cant provide any perfect detailed answer here. GO FOR IT Congratulations

John T
 
I believe he suggested the "Nemo 24vdc solar pump"...$240.00 - 1-2 gpm delivery; seems like not much water. If there would be one less expensive it would be great. I also thought he said to put "two 12v batteries in series"..? The pump requires 50-100 watts. Do you have a panel number? Thanks.
 
Two 12 volt batteries in series is 24 volts, that's fine if its a 24 volt pump??? If its a 12 then two 12 volt batteries would wire in parallel. 100 Watts at 12 volts = around 8 amps (but only 4 if its a 24 volt system) so if it ran 8 hours that's 8 amps x 8 hours = 64 Amp Hours it would draw down the battery bank which needs replaced ya know. The best a so called 12 volt 100 watt solar panel if under direct bright sunlight at the right angle to charge at 13 volts would be around 7 amps it can pump into the batteries HOWEVER you seldom get that much, maybe 5 charging amps and 5 charging amps for say 6 hours is ONLY 30 Amp Hours of energy. Subject to solar size and amount of sunlight and the angle and how long the pump runs and how much current it draws, I fear 100 watts of solar may not keep the battery charged BUT IM LOOKING AT A 12 NOT 24 VOLT SYSTEM AND 100 NOT 50 WATTS MIND YOU ????????

Sorry no solar panel numbers for you

John T
 
My $80 ebay pump is also 1-2 gpm.
I am running it on 2 100w panels in series. No batteries. If you are going to charge batteries for longer run time you will need a lot more panels, maybe 800-1000w.
 
ok.... can we email or talk sometime this evening? That would be 1,440 gals in 24 hrs; to raise the pond 1" would take 20 days? Hmmmmm
 
My wife has a stack of 280 watt solar panels out here for a system she is having installed here. She paid less for one 280 w panel than I did for the 2 100 w panels. I believe the 280's put out 24 volts so don't need to be connected in series. I would like to try one of those on my pump system but have not done so yet. I think it would give better performance and possibly a little longer run time. With batteries and a charge controller you could configure for 24 hr operation.

We got a rain here so I quit using my pump to water the garden and am running it into our pond which recently went dry. It is at a much lower level (less head). If I get a chance later I will go down and measure the flow. There is already a decent size puddle in the bottom of the pond from yesterday.

Oh I just cut a couple of 1x4 sticks to prop my panels at the right angle. It is just temporary and there are no cows in there so it works for now.
 
I went down to check the flow pumping in to the pond with 10'-12' head. It was less than 1/2 gallon per minute. I then went to the spring that feeds the pump and found it plugged up and the pump purring away but was sucking air. I got the spring running good and checked the flow from the pump and it was 1 gallon in 50 seconds.

The pump is rated for 100 psi so I don't think head is the limiting factor, I think it is power. With more power the pump will spin faster, maybe pump 2 gpm. The pump may not hold up as long under high speed conditions.
 
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