Trojan Battery User Guide

TROJAN BATTERY
20
Table 5
Deep-Cycle AGM Batteries - Charger Voltage Settings
**
System Voltage 6 Volt 8 Volt 12 Volt 24 Volt 36 Volt 48 Volt
Bulk Charge (2.40 VPC) 7.20 9.60 14.40 28.80 43.20 57.60
Absorption Charge (2.35 – 2.45 VPC) 7.05 – 7.35 9.40 – 9.80 14.10 – 14.70 28.20 – 29.40 42.30 – 44.10 56.40 – 58.80
Finish Charge (2.45 VPC) 7.35 9.80 14.70 29.40 44.10 58.80
Float Charge (2.25 – 2.3 VPC) 6.75 9.00 13.50 27.00 40.50 54.00
** AGM batteries should always use temperature compensated charging per the following rule:
5.0 mV per cell / °C or 2.8 mV per cell / °F
Subtract 0.005 volt per cell from the voltage reading for every 1°C above 25°C, or add 0.005 volt per cell for every 1°C
below 25°C. Subtract 0.0028 volt per cell for every 1°F above 77°F, or add 0.0028 volt per cell for every 1°F below 77°F.
The chart below illustrates a typical recharge prole:
Diagram 5
Recommended Trojan Deep-Cycle AGM Charging Prole
Note: Charging time will vary depending on battery size, charger output, and depth of discharge.
Voltage
(per cell)
Current
(Amps)
2.35V to 2.45V
(@25°C, 77°F)
Charge Current
Charge Voltage
20% 80%
100%
State of Charge (%)
Approximately
C
20
/200
Will increase
with age
20% C
20