the fan  is 0.6 amps.  other specs are: Speed: 3000RPM, Noise: 45.90dBA, 
Airflow: 133.60CFM

here it is: Scythe DFS123812H-3000 Ultra Kaze 120mm x 38mm Case Fan - 3000RPM

perhaps i need more power from my panel, which has a max current of .57 amps.
 
  
             
Scythe DFS123812H-3000 Ultra Kaze 120mm x 38mm Ca...
Amazon.com: Scythe DFS123812H-3000 Ultra Kaze 120mm x 38mm Case Fan - 3000RPM: 
Computers & Accessories  
View on www.amazon.com Preview by Yahoo  
  
 


On Sunday, July 20, 2014 5:15 PM, Hunter <[email protected]> wrote:
 


What is the power draw of the fan? What fan are you using?
On Jul 20, 2014 2:23 PM, "'Adam Gensler' via hexayurt" 
<[email protected]> wrote:

hello.  i'm hoping someone on this list can help a guy out who doesn't 
understand electronics/solar very well.   but is trying....
>
>
>i'm trying to fix something that didn't work well the first time i tried 
>it--solar powered swamp cooler for the desert/burning man.  there were two 
>problems--the cool airflow wasn't that great (got into the yurt, but didn't go 
>very far at all) and it didn't last for as long as i wanted.  
>
>
>i'm basically just powering one computer fan 
>(http://www.amazon.com/gp/product/B001JKNMBE/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1).
>
>
>i am using a 10w solar panel and a battery that is 7 amp hours.  the solar 
>goes through a controller to the battery to the fan in the swamp cooler.  i'm 
>thinking there could be 3 reasons for the fail:
>
>
>       1. solar panel isn't powerful enough: Instapark® NEW All Black 10W 
> Mono-crystalline Solar Panel with 12V Solar Charge Controller
>       2. battery isn't powerful enough.  
> http://www.amazon.com/Volt-Rechargeable-Battery-187-Terminals/dp/B002QGVWBW/ref=pd_sim_lg_1/189-7076484-2013714
>       3. sun wasn't powerful last year because of massive forest fire that 
> grayed the skies and limited the sun's power.
>  
>             
>Instapark® NEW All Black 10W Mono-crystalline Solar ...
>Amazon.com : Instapark® NEW All Black 10W Mono-crystalline Solar Panel with 
>12V Solar Charge Controller : Patio, Lawn & Garden  
>View on www.amazon.com Preview by Yahoo  
>  
> 
>if you have any insights, i'd love to hear them.  sometimes i think i should 
>use to fans to power the swamp cooler, but i've seen many designs with one and 
>people on the interweb claim they've had success with it.  also, i know there 
>are some formulas that people use to gauge what they need; having trouble 
>grasping the interplay between the different parts of the system.
>
>
>i know very little about this crap.  would like the battery to keep the fan 
>charged for 8 hours, if possible (starts at sunrise and keeps going through 
>the worst heat of the day).  also, we will be adding another fan (household) 
>this year, so the system will need to work even harder.  
>
>
>thank you in advance.  my wife has threatened to bring an air conditioner + 
>generator next year, if this 2.0 version doesn't boast improved results. :-(
>
>
>-a
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