16
Fig. 10
：
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) 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 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.
4-2. Operation mode introduction
The LSC12-2000 is not just a combination of an inverter and a battery charger. There are many
additional features which can be used to increase the total available AC power, even when external AC
power is limited.
4-2-1. Basic operation description
When there is no external “AC input” power available, the inverter of the unit provides AC power output
load from the batteries.
When external AC power comes available, the transfer relay switches on. Both outputs as well as the
