User Guide
TROJAN BATTERY
22
Table 7
FLOODED/WET STATE OF CHARGE AS A FUNCTION OF SPECIFIC GRAVITY AND OPEN-CIRCUIT VOLTAGE
STATE OF
CHARGE (%)
SPECIFIC
GRAVITY
CELL 6 VOLT 8 VOLT 12 VOLT
100 1.277 2.122 6.37 8.49 12.73
90 1.258 2.103 6.31 8.41 12.62
80 1.238 2.083 6.25 8.33 12.50
70 1.217 2.062 6.19 8.25 12.37
60 1.195 2.04 6.12 8.16 12.24
50 1.172 2.017 6.05 8.07 12.10
40 1.148 1.993 5.98 7.97 11.96
30 1.124 1.969 5.91 7.88 11.81
20 1.098 1.943 5.83 7.77 11.66
10 1.073 1.918 5.75 7.67 11.51
AGM STATE OF CHARGE AS A FUNCTION OF OPEN-CIRCUIT VOLTAGE
STATE OF
CHARGE (%)
SPECIFIC
GRAVITY*
CELL 6 VOLT 8 VOLT 12 VOLT
100 1.295 2.14 6.42 8.56 12.84
75 1.245 2.09 6.27 8.36 12.54
50 1.195 2.04 6.12 8.16 12.24
25 1.145 1.99 5.97 7.96 11.94
0 1.095 1.94 5.82 7.76 11.64
GEL STATE OF CHARGE AS A FUNCTION OF OPEN-CIRCUIT VOLTAGE
PERCENTAGE
CHARGE
SPECIFIC
GRAVITY*
CELL 6 VOLT 8 VOLT 12 VOLT
100 1.295 2.14 6.42 8.56 12.84
75 1.265 2.11 6.33 8.44 12.66
50 1.215 2.06 6.18 8.24 12.36
25 1.155 2.00 6.00 8.00 12.00
0 1.125 1.97 5.91 7.88 11.82
* Although the specic gravity cannot be measured in a VRLA battery, an approximate value can be useful in
determining the freezing point of electrolyte.