User Guide
TROJAN BATTERY
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Figure 8
5.3.Equalizing (flooded/wet batteries only)
When batteries are used in a battery bank, over time some of the batteries can drift to a lower state of
charge than others. This charge imbalance can lead to sulfation and premature battery failure.
In order to ensure that these charge imbalances are corrected, a process called
“
equalization” is used.
Equalizing is an overcharge performed after fully charging deep-cycle ooded/wet batteries. An
equalizing charge prevents electrolyte stratication and reduces sulfation, which are leading causes of
battery failure. Trojan recommends equalizing for 2-4 hours in the following situations:
î Periodically (every 30 days)
î When batteries have a low specic gravity after charging (<1.235), or
î When the range of specic gravities between cells is > 0.030 points
î Reference Section 9.3 for instructions on specic gravity measurement.
W A R N I N G! Deep-cycle AGM or gel batteries should NEVER be equalized.
Equalization can be performed either automatically (as programmed on the charger) or by following the
procedure below:
î Check the battery’s electrolyte level in each cell to make sure the plates are covered before charging.
î Check that all vent caps are secured properly on the battery before charging.
î Set charger to equalizing mode.
î The batteries will gas (bubble) during the equalization process.
î Measure the specic gravity every hour.
î Discontinue the equalization charge when the specic gravity no longer rises.
Recommended Trojan Deep-Cycle Gel
Charging Prole
Note: Charging time will vary depending on battery size, charger output, and depth of discharge.
Voltage
(per cell)
Current
(Amps)
2.40V
(@25°C, 77°F)
Charge Current
Charge Voltage
20% 80%
100%
State of Charge (%)
10-13% C
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