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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
accumulate and calculate the time of constant voltage working. When the
accumulated time reach to 3 hours, the charging mode will turn to Float
Charging.
2) If the controller time is not adjusted, the controller will equalize charge
battery once every month following the inner time.
C) Float Charging
After the Constant voltage stage, the controller will reduce charging current to
Float Voltage setpoint. This stage will have no more chemical reactions and all
the charge current transforms into heat and gas at this time. Then the controller
reduces the voltage to the floating stage, charging with a smaller voltage and
current. It will reduce the temperature of the battery and prevent the gassing
and charging the battery slightly at the same time. The purpose of Float stage
is to offset the power consumption caused by self consumption and small loads
in the whole system, while maintaining full battery storage capacity.
In Float charging stage, loads are able to obtain almost all power from solar
panel. If loads exceed the power, the controller will no longer be able to maintain
battery voltage in Float charging stage. If the battery voltage remains below the
Recharge Voltage, the system will leave Float charging stage and return to Bulk
charging stage.
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