Owner`s manual

Descriptions of Operation
TruSine 4.5 kW Inverter Page 8 Owners Manual
the unit to automatically charge batteries which maintains the battery’s integrity and reduces the likelihood of
premature battery failure. The battery charger is designed to be used with lead-acid type batteries including
sealed and gel types, but not for nickel-cadmium (Ni-Cad) or nickel-iron types.
Battery Charging Sequence
Stage 1: Bulk Charge Stage
The charger always starts in the Bulk Charge
Stage each time shore power becomes present
and/or each time the charger is turned ON. In
Bulk Charge the system charges at the ‘Bulk
Charge Amps’ setpoint until battery voltage rises
to the ‘Bulk Charge Voltage’ setpoint. Then the
voltage is held at that setpoint until charging
amps have fallen to 5 amps above the ‘Battery
Absorption Amps’ setpoint. This ends the Bulk
Charge Stage and begins the Absorption
Charge Stage. The charger will not enter the
Bulk Stage again until shore power is reapplied,
or until the charger or the system is turned ON again.
Stage 2: Absorption Charge Stage
The Absorption Charge Stage provides a controlled “overcharging” of the battery which is necessary to bring
the battery up to full charge. The battery is charged at the ‘Absorption Charge Amps’ until one of following three
conditions occur which signals the end of the Absorption Stage;
Time: The Absorption Maximum Time setpoint is reached
Time: The Absorption Charge Stage has reached ½ of the duration of the Bulk Charge Stage.
Voltage: Battery voltage reaches the ‘Absorption Voltage’ setpoint
Stage 2A Equalize Charge Cycle
When Equalize Mode is ENABLED, one Equalize Charge Cycle will follow the Absorption Charge Stage. The
Equalize Cycle will last for the ‘Equalize Time’ setpoint. Equalize Mode will automatically switch to DISABLED at
the end of the Equalize Charge Cycle. During the Equalize Cycle the battery is charged at the ‘Absorption
Charge Amps’ setpoint and the Equalize Voltage setpoint.
The Equalize Charge Cycle provides a deliberate overcharging of the battery to remove sulfate which
accumulates on the battery plates through normal use. Equalizing returns battery cells to equal performance
levels which improves battery performance and extends battery life. Consult the battery manufacturer for their
recommendation regarding equalize voltages how often the Equalize Cycle should be performed.
CAUTION
Do not equalize sealed (valve regulated lead acid or gel) batteries!
Consult battery manufacturer for
equalizing guidelines. Do not equalize more often than approximately once a month. Check battery fluids after
equalizing is complete, as gassing will occur. Use Equalize Mode only while batteries are well ventilated!
Stage 3: Float Charge Stage - Maintenance Mode
In the Float Stage the charging voltage is reduced to the ‘Float Charge Voltage’ setpoint and charging current is
limited to the ‘Absorption Charge Amps’ setpoint. The charger will remain in the Float Stage until shore power is
reapplied, or until the charger or system is turned OFF and then ON again.
Charging Setpoints
The TruSine’s battery charger factory setpoints are for wet batteries. Do not use the factory setpoints for gel
batteries. If gel batteries are used, consult the battery manufacturer for charging recommendations. Setpoints
for typical gel batteries are listed and may be used if specific recommendations are not available from the gel
battery manufacturer.
Caution: Do not operate DC loads, such as DC lights, pumps, etc., during battery charging. The loads may
cause overcharging by preventing the charging stages from reaching their ‘trigger points’ or may cause the
battery to run down even though the charger is ON.
VOLTAGE
CURRENT
TIME
BULK ABSORPTION
OPTIONAL
EQUALIZE
FLOAT
TRIGGER POINT