24 hours multiplied by 500w equals 12000w or 12kw.
I guess the poster is doing engineering inspection.
How many wind speeds can there be on average at 7-8m/s per day? Hours?
We assume that in general areas there are only 4-5 hours, then you need about a 3kw fan, which can supply 12kw to 15kw every day, provided that you have to ensure that there is so much wind every day.
If the wind speed is very good and is greater than 7m/s for 12 hours or more every day, then you can choose a 2kw fan.
As for the battery, it is recommended to choose at least 10 12v 150AH batteries , this can basically store 15kw of electricity, which can last for a day without wind. If the number of days that need to be supported increases, you can double the battery.
Although your maximum power does not exceed 600w, it is still recommended that you choose A 2kw inverter is only a few bucks after all.