Trojan Battery User Guide
TROJAN BATTERY
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4.4.3 Equalizing (deep-cycle ooded/wet batteries only)
Equalizing is an overcharge performed after fully charging deep-cycle ooded/wet batteries. An
equalizing charge prevents battery stratication and reduces sulfation which are leading causes of
battery failure. Trojan recommends equalizing every 30 days or when batteries have a low specic
gravity reading after fully charging, below 1.235, or have a wide ranging specic gravity of >0.030 points
between cells. Reference Section 8.3 for instructions on specic gravity measurement.
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. Refer to Table 7 for specic gravity and voltage
measurements. Discontinue the equalization charge when the specic gravity no longer rises.
WARNING Do not equalize deep-cycle AGM or gel batteries.