Exide Technologies GB4128 - Manual (Page 9)

Ferro Magnetics Corporation, St. Louis, MO
2.1.3. EQUALIZE CHARGE
Over time b atteries can develop inequalities in cell charge. This can lower the effective capacity of the
battery and shorten life. An equali zing charge re-bal ances the ch arge in the b attery cells. Perform a n
equalize charge if any of the following conditions exist:
1. On flooded batteries the specific gravity of any cell at the end of charge is 20 points less than the
average of all the cells.
2. The on-charge voltage of any cell at the end of charge is 20 millivolts less than the average of all
the cells.
3. The battery has been stored for 30 days or more.
The control can perform an equalize automatically based on the number of charge cycles or on a specific
day of the we ek. An equalize consists of an additional 3 hour charge time at th e end of a normal charge
cycle. The control i s set at the factory to pe rform an automatic e qualize e very 7 charging cycles fo r
flooded lead-acid batteries.
The control can also perform an equalize charge when requested manually. Press the ‘EQUALIZE’ key.
The UNITS portion of th e display will cha nge f rom ‘ A ‘ to ‘ AE’ indicating an equali ze charge will be
performed on the current charge. If no battery i s connected, the next charge cycle will be extended to
allow the cells to equalize their charge.
The auto-equalize or manual equalize charge can be cleared by pressing the ‘EQUALIZE’ key again. The
UNITS portion of the displ ay will change from ‘ AE‘ to ‘ A ’ indicating a norm al charge will be performed.
The next auto equalize charge will occur after the programmed number of charge cycles.
If auto equalize is not desired, contact your service representative for de-activating instructions.