Samlex Power SCC-30AB Manuel Du Propriétaire page 22

SECTION 4 |
During this stage, LCD Screen 4 displays " State: Absorption". LCD Screen 5
(Fig 5.3) shows the programmed Absorption Voltage Regulation Set Point (Displayed
on the screen under "Bulk").
NOTE: During Absorption Stage, if the load current is more than the current from the
solar panel, the battery voltage will drop. If the battery voltage drops around
1V below the Absorption Voltage Regulation Set Point "Va" for around 1 min,
the controller reverts to Bulk Stage. PWM DUTY Cycle is changed to 100% and
the LCD Screen 4 changes to "State: Bulk".
Stage - 3: Float Stage. The controller enters this stage from the previous Absorption
Stage at point "D" after the battery voltage is held at the selected Absorption Voltage
Regulation Set Point "Va" for continuous or cumulative period of 1 Hour.
During this stage (Curve portion "D" to "E"), the Switch operates under PWM control by
feeding pulsing Short Circuit Current "Isc" with very low Duty Cycle of 0% to < 10% to
keep the battery voltage constant at the Float Voltage Regulation Set Point "Vf". During
this stage, the battery is 100% charged and a very low "Trickle Charge" of around 0.1% of
the Ah Capacity is required to be fed to the battery to compensate for self-discharge. The
battery can be left at this stage for prolonged period of time.
During this stage, the LCD Screen 4 displays "State: Float". Screen 5 displays the
programmed Float Voltage Regulation Set Point (Displayed on the screen under
"Float").
NOTE: During Float Stage, if the load current is more than the current from the solar
panel, the battery voltage will drop. If the battery voltage drops around 1V below
the Float Voltage Regulation Set Point "Vf" continuously for around 1 hour, the
controller reverts to Stage 1: Bulk Stage. PWM DUTY Cycle is changed to 100% and
the LCD Screen 4 (Fig 5.3) changes to "State: Bulk".
Lithium Battery Charging
The following settings are for Lithium batteries, designed for drop in replacement of
lead acid batteries.
DIP SWITCH
2-3-4
ON-ON-OFF
ON-ON-ON
The profiles operate the same as the lead acid profiles with the following exceptions:
• Temperature compensation is disabled
• Absorption time is 30 min instead of 1 hour
• Reset to Bulk charging mode occurs at 13.0V or 26V
• Equalization functions are disabled
22 | SAMLEX AMERICA INC.
Principle of Operation & Features
ABSORB FLOAT
VOLT VOLT
14.3V 13.4V
14.4V 13.5V
Table. 4.1. Lithium Battery Profile Settings
EQUAL EQUAL
VOLT TIME
Profile for Lithium
Profile for Lithium
EQUAL
INTERVAL