Samlexpower Evolution EVO-2212 Owner's Manual page 77

SECTIOn 5 |
for example, if the programmed charging current is say 40A and the charging current of the
external charger is 30A, the internal AC charger will output only 10A (Programmed setting of
40A – external charging current of 30A = 10A). Similarly, if the programmed setting is say 30A
and the external charger is 50A, the internal AC charger will not provide any charging.
5.6.2 Absorption Stage
During the Absorption Stage, the charging voltage is held constant near the Gassing Voltage
to ensure that the battery is further charged to the full capacity without overcharging. The
Absorption Stage restores the remaining 25% of the battery's charge. The time the charger
remains in the Absorption Stage is proportional to the depth of discharge of the battery. When
the battery is more discharged, it will take longer time in the bulk Charge Stage to reach the
Gassing Voltage. As a part of the Adaptive Charging Algorithm, the "T1 Timer" (explained
above) computes the time the charging takes place in this stage.
Absorption Time T1 = bulk Charge Time To x 10 (To = Time from entering bulk
–
Charge Stage till battery voltage rises to 0.3V below Absorption Voltage).
The "T1 Timer" has minimum time of 1 hour and a maximum time of 12 hours.
–
When the T1 Timer runs out, the charger will enter the next float Stage.
–
Programmable range and Default values of Absorption Voltage are shown in Table 6.2.
–
this stage is displayed as "n-cv" in the charging mode screens in the remote control
evo-rc (Please see Section 3.6.1 at Appendix A).
5.6.3 float Stage
float Stage is a maintenance stage in which the output voltage is reduced to a lower level, typically
about 13.5 volts, (27 volts for 24V models) to maintain the battery's charge without losing electrolyte
through gassing and also prevent corrosion of Positive plate by maintaining proper Positive plate
Polarization Voltage. Programmable range value of float Voltage are shown in Table 6.2.
this stage is displayed as "float" in the charging mode screens in the remote control
evo-rc (Please see Section 3.6.1 at Appendix A).
5.6.4 Automatic resetting of charging cycle in 3 Stage charging Profile
The charging cycle will be reset to the bulk Stage as follows:
- If the AC input from the Grid/Generator is disconnected and is reconnected or the battery
voltage drops below 12 VDC / 24 VDC (Default). Programmable range for this voltage
is 10 to 13V for 12V battery and 20 to 26V for 24V battery (This parameter is called
"fLOATING EXIT". See Table 6.2 and Section 4.4 of Appendix A).
- If the charger remains in the float Mode for 10 days.
5.7 4 StAge chArging in eQuAliZAtion moDe
!
cAution!
equalization mode should be performed only on vented, flooded (non-sealed or
"wet") batteries and not on the sealed Agm / gel cell batteries and only as often as
recommended by the battery manufacturer.
Battery Charging in Evolution Series
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