Dometic WAECO PerfectCharge MCP04/07 Operating Manual page 35

PerfectCharge MCP04/07 Technical description
6.3 Battery charging function
The battery charger operates in eight phases (fig. 3, page 4).
1: Desulphation
Sulphated batteries are revived in the desulphation phase. The current and
voltage pulse, so that sulphate is decomposed into its amorphous structure.
The battery capacity is restored.
2: Soft start
The charging capability of the battery is tested using the power consumption
in the soft-start phase. When the battery is defective, the charging process is
aborted.
3: I phase (bulk)
The empty battery is charged with constant current (100 % charge current).
As soon as the battery voltage has reached the charge voltage, the charge
current decreases.
4: U0 phase (absorption)
The voltage remains constant during the U0 phase (U0). Once the battery is
completely charged, the U0 phase has finished.
5: Analysis
The float charge of the battery is checked in the analysis phase. If the voltage
drops too quickly, the battery can not retain the charge and must be replaced.
6: Reconditioning
The voltage is increased again in the reconditioning phase in order to
generate controlled gas formation in the battery. This gas formation prevent
acid stratification (different concentrations of acid in the battery cells).
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