Quote:
Originally Posted by id10t
If it is cheap enough, would 2 or 3 or 4 of them work? Even if you hit the hardware cost for a "real" fan, the solar aspect would still save you money.
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The issue is that the solar panel can in no way give you that much power to run that much fan. When the power is low, the fan will run slower. So they are giving you the full flow rating of the fan, not what you will actually get.
A 1500 CFM fan uses a 1/5 hp motor. With a 1.85 service factor, it will run about 275 Watts (2.5 Amps) @ 110VAC). How is a 5 Watt solar panel going to provide enough power to flow 350 CFM?
The 1000 CFM fan uses a 1/9 hp motor, which would be 153 Watts. A 350 CFM fan will need about 50 Watts to operate. A 5 Watt solar panel isn't going to do it.