7
Charging Stages
English
Bulk stage
During this stage the MPPT controller delivers the maximum current to rapidly recharge the
batteries. When the battery voltage reaches the absorption voltage setting, the MPPT controller
activates the next stage (absorption).
Absorption stage
During this stage, the MPPT controller switches to the constant voltage mode, where the
absorption voltage is applied to the battery. When the charge current decreases to the float
transition current setting, the battery is fully charged and the MPPT controller switches to the
float stage. The default time for float stage is 120 minutes.
Float stage
During this stage, the float voltage is applied to the battery to maintain it in a fully charged
state. When battery voltage drops below the recharge setting voltage a new bulk cycle will be
triggered.
Bulk
Current
(Amperes)
Voltage
(Volts)
Absorption Float
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