Alpha Group OutBack Power EnergyCell 200PLC Owner's Manual - Page 12
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Installation and Operation
Commissioning
The commissioning charge applies when the batteries have been in transit or in storage for 24
months or more. (This applies at a storage temperature of 25°C or 77°F. The interval is shorter
at higher temperatures.) It is also needed when the battery system is intended for use at the
minimum float charging voltage or when the number of cells in series is greater than 24. Under
any of these conditions, it is recommended the battery system be given a freshening charge at
2.35 volts average per cell for 24 hours. This will assure higher initial performance and will
reduce the time period required for the cells to achieve proper voltage balance between the
individual units.
To apply a freshening charge:
Confirm the freshening (equalization) voltage from the charger/rectifier is set to a value equal to the
Absorb Charging Voltage shown below.
Close the circuit from the charger to the battery and confirm that the battery accepts current.
Monitor the battery periodically and note that the operation is proceeding normally. Make certain that
the current acceptance is declining and that the batteries are not overheating (within ±5°F or ±2.8°C
of each other and the ambient temperature). Make certain that the individual battery voltages on
equalization charge are 14.1 ± 0.50 Vdc.
Terminate the freshening charge in the case of any extraordinary situation or after 24 hours.
Initial Float Charging
Following the freshening charge the battery system should be placed on float charge at a value
equal to the Float Charging Voltage shown in the following section. See page 13 for a
description of float charging.
Prior to placing on float charge, assure the charger is set to the proper output voltage. After the
battery system has been on float for approximately 24 hours, the float current acceptance
should be greater than zero, but no more than approximately 0.005 Adc per rated ampere-hour
capacity of the battery string.
Charging
EnergyCell PLC batteries are usually charged using a "three-stage" charging cycle: bulk stage,
absorption stage, and float stage. Most OutBack chargers follow this algorithm. However, not
all chargers are designed or programmed the same way. The settings should be checked and
changed to match the recommendations below if necessary.
Charging Voltages
o
Absorb Charging Voltage: 14.1 Vdc
o
Equalize Charging Voltage: 14.1 Vdc (same as Absorb voltage but used under different conditions)
o
Float Charging Voltage: 13.5 Vdc
Bulk Stage
The bulk stage is a constant-current stage. The charge current is maintained at a constant high
level. The battery voltage will rise as long as the current flows. This battery has a
recommended maximum current limit of 50 Adc which should not be exceeded. At excessive
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900-0227-01-00 Rev A