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A) Bulk Charging
In this stage, the battery voltage has not yet reached constant voltage (Equalize or Boost Voltage), the
controller operates in constant current mode, delivering its maximum current to the batteries (MPPT
Charging).
B) Constant Charging
When the battery voltage reaches the constant voltage setpoint, the controller will start to operate in
constant charging mode, this process is no longer MPPT charging, and in the meantime the charging
current will drop gradually, the process is not the MPPT charging. The Constant Charging has 2 stages,
equalize and boost. These two stages are not carried out constantly in a full charge process to avoid too
much gas precipitation or overheating of battery.
Boost Charging
The Boost stage maintain 2 hours in default, user can adjust the constant time and preset value of boost
voltage according to demand.
The stage is used to prevent heating and excessive battery gassing.
Equalize Charging
WARNING: Explosive Risk!
Equalizing flooded battery would produce explosive gases, so well ventilation of battery
box is recommended.
CAUTION: Equipment damage!
Equalization may increase battery voltage to the level that damages sensitive DC loads.
Verify that all load allowable input voltages are 11% greater than the equalizing charging
set point voltage.
CAUTION: Equipment damage!
Over-charging and excessive gas precipitation may damage the battery plates and activate
material shedding on them. Too high an equalizing charge or for too long may cause
damage.
Please carefully review the specific requirements of the battery used in the system.
Some types of batteries benefit from equalizing charge on a regular basis, which is able to stir electrolyte,
balance battery voltage and accomplish chemical reaction. Equalizing charge increases battery voltage,
higher than the standard complement voltage, which gasifies the battery electrolyte.
The controller will equalize the battery on 28th each month. The constant equalization period is 0~180
minutes. If the equalization isn’t accomplished in one-time, the equalization recharge time will be
accumulated until the set time is finished. Equalize charge and boost charge are not carried out constantly
in a full charge process to avoid too much gas precipitation or overheating of battery.
NOTE:
1) Due to the influence of ambient circumstance or load working, the battery voltage can’t be
steady in constant voltage, controller will accumulateand
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