BattaMax User Manual
Revision 3.0
Page 8 of 13
windy
nation
10/04/2019
4 SERVICE AND MAINTENANCE
4.1 C
HARGING
BattaMax batteries are charged at the factory and are ready for installation when they are received. Proper
charging will maximize battery performance and lifecycle. Undercharging as well as overcharging batteries will
significantly reduce the life of the battery. For optimum performance the use of a 3-stage charge controller is
recommended (Bulk, Absorption, and Float). The three stage charge process provides a somewhat higher
charge voltage to charge the battery quickly and safely. Once the battery is fully charged, a somewhat lower
voltage is applied to maintain the battery in a fully charged state.
Important:
Batteries should be fully charged after each discharge of at least 30 minutes.
Charge only in well-ventilated areas.
Caution:
Never charge a frozen battery and avoid charging at temperatures above 122°F (50°C).
Charge Mode
Voltage Setting
1
(@25°C, 77°F)
Bulk
14.4V
Absorption
14.1 – 14.7V
Float
13.5V
1
Temperature compensated charging should be used at -4.0 mV/Cell/
o
C
4.1.1
State of Charge (SOC)
Charge Percentage
(%)
Cell
(Open Circuit Voltage)
Battery
(Open Circuit Voltage)
100
2.14
12.84
75
2.09
12.54
50
2.04
12.24
25
1.99
11.94
0
1.94
11.64
