Xantrex Technology RS3000 - Manual (Page 40)

Operation
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Operating in Equalization Mode
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.
Measure the specific gravity (S.G.) of each cell using a hydrometer. For
fully charged lead-acid batteries, the reading should be approximately
1.265. Low specific gravity after charging or a 0.25 difference from cell
to cell indicates the need for equalization.
WARNING: Explosive gases
Equalization generates explosive gases. Ensure adequate ventilation.
CAUTION: Batteries may be damaged
Sealed lead-acid batteries and gel batteries must NEVER be equalized or
premature battery failure will result. Equalize mode is disabled if you have
selected “Gel” and “AGM” as the battery type.
Only flooded (wet) lead-acid batteries should be equalized. As a general rule, do
not equalize a battery unless there are provisions to add water to it and the
manufacturer recommends equalization.
If carried out too frequently or done improperly, equalization can damage your
batteries. Never equalize a battery more than necessary. Always check electrolyte
level before AND after equalization. Fill with distilled water per the battery
manufacturer’s recommendation.
CAUTION: Risk of damage to DC load equipment
Equalization voltage may be as high as 15.8 volts DC. Disconnect sensitive loads
from the battery before equalizing.