Island Girl - I am back on this project and I need some more help, as my electrical acumen is poor, at best.

When you said the motor needs about 960 watt-hours, that was for the non charging time. Correct? If so, I will need another 480 watt hours to run the fan during day light hours. So was the 1,000 watt hours that you noted above a rounding of the 960? If I am still on the right track, I will need to generate ~ 1500 watt hours in 8 hours. Dividing the 1500 watt hours by 12 volts, I will need a 125 amp hour battery. Also, dividing the 1500 by 8 hours, I will need panels totaling 187.5 watts. Am I on the right track, before I factor in the 50% efficiency of the solar panel(s)?

I have seen many solar panel Controllers on Amazon. Are they just a switch to send power to the load (fan) or to charge the battery? Final question, what size controller will I need?

Thanks for all of your help!