So I'm still trying to diagnose this.
I finally got a new solar cover. I checked voltage at the terminals on the cover. Both the top panel and the bottom panel are putting out 2.5 volts. OK so I plug it up to the ISS and the fan still doesn't come on. Sigh..
So I checked voltage at the terminals on the solar cover WITH IT PLUGGED UP TO THE ISS and now I get 0.52 volts.
So, when it's not plugged up it puts out good voltage and when it is plugged up the voltage drops. I then checked my old panel and it turns out that it's the same way. So my solar cover wasn't the problem afterall.
So what's going on here? Fan is new, cover is fine, battery is fine. Why is my voltage dropping and not allowing my fan to run??
Battery would have nothing to do with Dfar fan that's part of the ISS transmitter.
Double check everything make sure all plugs are wired correctly.
And you say fan is new? Freely spins by hand inside where it sits no obstruction binding fan like a cable etc.
The upper solar panel is plugged into the ISS for charging capacitor
The lower solar panel is plugged into the fan assembly wire
Fan Assembly wire is plugged into fan
Voltages are good until you plug fan in and it doesn't spin
If all correct i would say fan is bad drawing the extra current.
You may need to contact Davis but go over manual again and check fan for free movement and all plugs are correct.