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Fig. 15
Charge characteristic of three-step plus charging method
4-1-2. Bulk charging
This is the initial stage of charging. While bulk charging, the charger supplies the battery with controlled
constant current. The charger will remain in bulk charge until the absorption charge voltage (determined by the
Battery Type selection) is achieved and charging time is 0.5~20 hours (determined by the battery
BulkMaxChaTime selection), then switches to absorption charging.
4-1-3. Absorb charging
This is the second charging stage and begins after the absorb voltage has been reached. Absorb charging
provides the batteries with a constant voltage and reduces the
DC charging current in order to maintain the absorb voltage setting. Charging for 0.5~10 hours (determined by
the Battery AbsMaxCha Time selection), then switches to final charging.
4-1-4. Float charging
The third charging stage occurs at the end of the absorb charging time. While final charging, the charge voltage
is reduced to the final charge voltage (determined by the Battery Type selection*). In this stage, the batteries
are kept fully charged and ready if needed by the inverter. The Float Charging stage reduces battery gassing,
minimizes watering requirements (for flooded batteries), and ensures the batteries are maintained at optimum
capacity.
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