Battery Equalization
975-0400-01-01
4–13
Battery Equalization
Equalization charging is the process of deliberately charging a battery (or battery
bank) at a high voltage for a set period of time. Equalize charging remixes the
electrolyte, helps to remove sulfate buildup on the battery plates, and balances the
charge of individual cells.
Be sure to read all cautions and warnings regarding equalization charging
batteries before allowing an equalization charge to occur.
Follow the battery manufacturer’s recommendations for equalizing your batteries.
As a guide, a heavily used flooded battery may need to be equalized once a month,
and a battery in light service may only need to be equalized every two to four
months.
You can set an equalization reminder on the Battery Menu. See page 3–6.
The equalization process lasts for one hour. When the equalization period had
finished, the Charge Controller will return to either the float or no float charge
stage.
Important:
The XW SCC maximum output voltage is limited to 72 V for a 60 V
battery system, and so is unable to equalize a 60 V battery system.
Important:
In a system where more than one device is capable of equalizing batteries
(such as a system including multiple XW SCCs and XW Inverter/Chargers), there is no
system-wide equalization command for all devices. To equalize with multiple devices,
each would have to be enabled individually. Alternatively, equalization can be performed
using only one device. During the equalization process, one device applies the
equalization charge while the other devices continue to operate in synchronized charge
mode, typically in float (three-stage charging) or no-float (two-stage charging).
WARNING: Explosive gases
Equalization generates explosive gases. Ensure adequate ventilation.
CAUTION: Batteries may be damaged
Never equalize a battery more than necessary. Equalization can damage your batteries if
performed too frequently or done improperly. Always check electrolyte level before
and
after equalization. Fill with distilled water according to the battery manufacturer’s
recommendation.
The XW SCC enables equalization only when the battery type is set to “Flooded.”
Equalize mode is disabled if you have selected “GEL” and “AGM” as the battery type. As
a general rule, do not equalize a battery unless there are provisions to add water to it and
the manufacturer recommends equalization.
CAUTION: Risk of damage to DC load equipment
The equalization voltage significantly exceeds the nominal voltage of the battery.
Disconnect sensitive loads from the battery before equalizing.
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