Victron energy Skylla-i 24/80 1+1 Skylla-i 24/80 3 Skylla-i 24/100 1+1 Skylla-i 24/100 3 Manuel page 10

3.2. DIP switch
The DIP switches are numbered 6 to 1, top to bottom.
Default settings:
DS-6 Bulk Protection
DS-5 Absorption time
DS-4 Absorption time
DS-3 Adaptive
DS-2 Watch
DS-1 Automatic equalization
3.3. Explanation of settings:
DS-6. Bulk Protection. When switched on, the failure LED will be lit and the charger will shut down when the bulk time exceeds
10 hrs.
DS-5 and DS-4. Absorption time. The combination of switches 5 and 4 sets the maximum absorption time in case of adaptive
charging, and a fixed time in case the adaptive mode has been switched off (DS-3).
DS-5 DS-4
Off
On
Off
On
DS 3. Adaptive. When switched on, the absorption and float time depend on the bulk time (with the maximum time set by DS-5
and DS-4).
The dependencies are as follows:
Absorption time = (bulk time)*20 with a minimum of 30 minutes and a maximum as set by DS-5 and DS-4.
Float time = (bulk time)*20 with a minimum of 4 hrs and a maximum of 8 hrs.
DS-2. Watch. When DS-2 is on, the battery voltage is checked when the charger is switched on. If the voltage exceeds 26V, the
charger will consider the battery fully charged, and start in storage mode. If the voltage is lower, the charger will start in bulk mode.
When DS-2 is off, the charger will always start in bulk mode.
DS-1. Automatic equalization. When DS-1 is switched on, the absorption charge will be followed by a voltage limited constant
current period (see table). The yellow LED "abs" will blink during equalization.
The current is limited to 8 % of the bulk current for all VRLA (Gel or AGM) batteries and some flooded batteries, and to 25 % of
the bulk current for all tubular plate batteries. The bulk current is the rated charger current (80 A or 100 A) unless a lower setting
has been chosen (charge current can be reduced with the current setting potentiometer and rotary switch in position 8, or with the
CAN-bus interface).
If, as recommended by most battery manufacturers, the bulk charge current is about 20 A per 100 Ah battery capacity (i.e. 500
Ah for a 100 A charger), the 8 % limit translates to 1,6 A per 100 Ah battery capacity, and the 25 % limit translates to 5 A per 100
Ah capacity.
In case of all VRLA batteries and some flooded batteries (rotary switch position 1, 2 or 3) automatic equalization ends when the
voltage limit maxV has been reached, or after t = (absorption time)/8, whichever comes first.
For all tubular plate batteries automatic equalization ends after t = (absorption time)/2.
Warning
Some battery manufacturers do recommend a constant current equalization period, and others do not. Do not use
constant current equalization unless recommend by the battery supplier.
Rotary switch position 8: manual setting potentiometers
These potentiometers provide adjustable levels for (from top to bottom):
• bulk current (range 0 A .. 100 A for a 100 A charger)
• absorption voltage (range 11.5 V .. 33.5 V)
• float voltage (range 11.5 V .. 33.5 V)
Control direction is such that the values increase when turning the potentiometer clockwise. For easy adjustment the charger will
automatically jump to the appropriate mode as soon as it detects a change in the position of a potentiometer. When satisfied with
the settings, restart the charger and it will go through the regular charge sequence using the new settings.
Software version 2.01 and higher: when adjusting, the current and voltage will be indicated by the LED bars (blinking) on the
Skylla-i, and by the display (blinking) on Skylla-i control panel.
Rotary switch position 9: DC power supply mode
The charger can be set to operate as a DC power supply.
In this mode, the charger functions as a constant voltage source with a maximum output current of 80 resp. 100 A. By default the
output voltage is set to 24V, if needed the output voltage can be changed by adjusting the absorption voltage potentiometer (range
11.5 V .. 33.5 V). When satisfied with the new setting switch off the charger using the main on/off switch and it will store the voltage
level.
When adjusting, the voltage will be indicated by the LED bars (blinking) on the Skylla-i, and by the display (blinking) on Skylla-i
control panel.
10
on
off
on
on
on
off
Off 2 hrs (preferred for LiFePo
Off
On
On
Absorption time
batteries)
4
4 hrs.
8 hrs. (default)
12 hrs.