STATE OF CHARGE
    
The following table will allow conversion of the readings obtained to an estimate of state of charge. The table is good for the batteries at 25 deg. C (77 deg F) that have been at rest for 3 hours or more. If the batteries are at a lower temperature you can expect lower voltage readings Printable PDF Version  
Percent of full charge
12 Volt DC system
24 Volt DC system
  
100%
12.7
25.4
  
90%
12.6
25.2
  
80%
12.5
25
  
70%
12.3
24.6
  
60%
12.2
24.4
  
50%
12.1
24.2
  
40%
12.0
24
  
30%
11.8
23.6
  
20%
11.7
23.4
  
10%
11.6
23.2
  
0%
11.6
23.2