Solar powered fan

[chico1st]

I dont know much about building with solar panels.
I would like to run a fan of mine at 4V (0.3 W) with a 5V solar cell which on short provides 100mA.

How do i know if the cell can run the fan at 4V and a decent current without buying it and testing it?

 

[wwenze]

On short provides 100mA, but what what voltage? The datasheet should say current vs voltage or max current @ specific voltage.

 

[benb]

"On short" would be zero volts. Surely there's some curve or formula for solar cells for voltage vs. current.