Schneider Electric User Guide

Configuration
3–18 975-0240-01-01
Equalize Charging
Many lead acid battery manufacturers recommend periodic equalize charging to
counter cell charge imbalance and capacity robbing sulphation. Equalizing
helps to improve battery performance and lifespan by encouraging more of the
battery material to become active.
Battery equalization is a controlled overcharging method that reduces sulphation
and mixes up stratified electrolyte and reactivates unused areas of the plate
material. Periodic equalizing can help to regularly restore flooded lead acid
batteries to a healthy state of charge.
Consult the battery manufacturer's recommendation for equalize charging
settings. Sealed lead acid, gel, AGM, and lithium ion batteries should not be
equalized unless recommended by the battery manufacturer. Consult the battery
manufacturer for optimal charging procedures when using sealed batteries.
When Equalize mode is enabled, the battery is charged from bulk to absorption,
and then to the equalize phase. The Conext XW+ will transition from the
absorption phase to equalize if:
• The DC charge current is below 2% of the configured battery capacity
(for example, 8.8 A for 440 Ah).
• The absorption time is exceeded (for example, 180 minutes).
Note:
When the charge cycle is interrupted, the charger will restart charging at the
beginning of the multi-stage algorithm.
Exit Current Threshold can be effectively disabled by programming the
amp-hour capacity to 0. In this case, absorption will only exit once the
Max Absorption timer expires.
Charge current during equalize state (optional state not shown in graph) is
normally limited to 10% of the programmed amp-hour capacity setting. If this
setting is programmed to 0 Ah, the charge current during equalize is limited to
whatever is programmed for the max current limit of the unit (the default current
limit in equalize mode is 60 A).
Synchronized charge states are active when more than one charging device
(Conext XW+ or Conext Solar Charge Controller) is connected in the system via
the Xanbus network.
• The first unit (Conext XW+ or Conext Solar Charge Controller) to enter bulk,
causes the other chargers to enter bulk.
• The first Conext XW+ to enter absorption causes the others to enter
absorption.
• The last Conext XW+ ready to exit absorption triggers the others to exit
absorption and exit charge. The Conext XW+ will not wait for any connected
Conext Solar Charge Controllers to transition to absorption or float.
Conext XW+ Owner's Guide NA (975-0240-01-01).book Page 18 Monday, November 27, 2017 10:00 AM