PROSINE 2.0 INVERTER•CHARGER USER’S MANUAL
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445-0089-01-01
Multi-Stage Charging
The PROsine 2.0 Inverter•Charger has a fully configurable multi-stage battery
charger. Anytime an acceptable (within frequency and voltage parameters)
AC source is presented to the unit and the charger is enabled, it charges the
batteries connected to it. When AC is present, the charger will charge the
battery bank regardless of the position of the inverter’s Enable/Disable switch.
Three-Stage Charging Profile
Modern lead-acid batteries last longer and charge faster if they are charged in
a particular sequence known as a three-stage charge. The PROsine 2.0
Inverter•Charger implements the three-stage charging process, plus a user-
triggered equalization charge. The charging current and voltage delivered to
the battery vary depending on:
• Battery type setting
• Battery temperature (by configuration or battery temperature sensor)
• AC input breaker setting (AC service setting)
• Battery bank size (capacity)
While the batteries are being charged, you can monitor which stage they are in
by viewing PROsine System Mode on the PROsine—Diagnostics menu. See
page 58.
Figure 27 shows how DC voltage and current change with time through the
different charge stages.
Figure 27 Three-Stage Charging Profile
Bulk
Absorption Charge Float Charge
DC Voltage
DC Current
Constant Current
@ Maximum
Charge Rate
Constant Voltage
Reduced Current and Voltage
Bulk Volts Setting
Float Volts Setting
Time
Charging
Started
Reduced Voltage
Load current on demand
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