Battery Charging Time Computation
SIMPLIFIED CALCULATION:

Your battery has (seen from the outside) a capacity of 600Ah. 

In an ideal world:
If you would start with a empty battery and could charge it with 600A it would be full in an hour. 

In a real world:
Each battery loses some energy while charging. This can be between 10% to 40%. Our empty battery would be full after 1.4 hours. 

You can charge in the best case with 800W (300W PV and 500W Wind). 

800W / 24V = 33A

600Ah*1.4 / 33A = 25H

This is a simplified version of the reality. Your wind and solar will probably never reach the 800W.