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A solar panel would have to have an output HIGHER than the amperage required for dc use. 12vdc requires 10 times the power that you get from 120vac. Also you'd better have four times as many 1" holes as 2" holes to flow the SAME amount of air.
It is more efficient to pull the air through the pads. Swamp cooler on rooftop houses do the same, pull in thru pads. Also a propeller fan is three times as efficient as a squirrel cage fan, uses 1/3 the power for the same cfm.
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