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SUGGESTED BATTERY CHARGER SET POINTS
The battery manufacturer should provide you with speci c instructions on the following maintenance
and voltage set point limits for the speci c batteries. The following information can be used when the
manufacturer’s information is not available.
SEALED LEAD ACID – AGM / GEL 12 V 24 V 48 V
ABSORB voltage set point 14.4 V 28.8 V 57.6 V
FLOAT voltage set point 13.4 V 26.8 V 53.6 V
NON-SEALED LEAD ACID 12 V 24 V 48 V
ABSORB voltage set point 14.8 V 29.6 V 59.2 V
FLOAT voltage set point 13.8 V 27.6 V 55.2V
NOTE: Higher settings can be used with non-sealed batteries, but water consumption will be greater
and excessive temperatures when recharging may occur.
Battery Voltage and State of Charge
A battery’s voltage can be used as a guideline to estimate the amount of power stored in the battery
that is available for use. When referencing the battery voltage on the display, be sure the battery is not
under signi cant recharging or heavy loads. Otherwise, the DC voltage is not re ective of the battery
state of cycle. Often the best time to check the battery voltage is in the morning (pre-charging) or at
night (postcharging), with the battery disconnected from charging sources and loads and a rest for at
least three hours.
Operation of a battery below 50% state of cycle will adversely a ect the long term health of the
battery system and will result in premature failure. Keeping the battery above the 50% level and
recharging it completely once a month will ensure proper operation and good performance.
STATE OF CHARGE
Nominal Battery Charged Good (~75%) Average (~50%) Low (~25%) Discharged
Voltage
12 V over 12.6 V 12.3 V 12.0 V 11.7 V under 11.4 V
24 V over 25.2 V 24.6 V 24.0 V 23.4 V under 22.8 V
48 V over 50.4 V 49.2 V 48.0 V 46.8 V under 45.6 V
60 V over 63.0 V 61.5 V 60.0 V 58.5 V under 57.0 V