From memory they use roughly 33 watts so you should be able to run three directly off that 120 watt panel i suggested with a little head room to spare.
How big of a solar panel to run a fan.
Those solar panels used for residential purposes range from 150 watts to 370 watts per panel depending on the panel size efficiency and cell technology.
A solar attic vent fan is installed in the attic space and a large solar powered ceiling fan in the great room keeps the comfort level on the hottest summer days tolerable.
Solar ceiling fan details the ceiling fan with 42 inch or 60 inch abs fan blades and a 10w led light.
Solar powered fans are still relatively rare.
Solar ceiling fan powered low energy led lights included with solar panels or 9 6ah rechargeable lithium battery.
Polycrystalline solar panel s to power fan led light directly during daytime.
They dont care if the voltage goes from 12 to 24 vdc or more it will run fine the rpm will change as the voltage fluxtuates but thats no big deal.
The power output size.
Most solar powered fans include a cord that s at least six feet long but a few have cords of 15 feet or more which should be enough to cover even the largest rooms.
Then use a 12 to 24 volt dc fan.
Not all solar panels are the same.
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The following table shows the sample power load for the california cabin.