Victron energy Skylla-IP65 24/35 Mode D'emploi page 12

4.2.7. Weekly battery 'refresh'
Once a week the charger will enter Repeated Absorption-mode during one hour to 'refresh' (i. e. to fully charge) the battery.
4.3. Four stage charge curve for Lithium Iron Phosphate (LiFePo4) batteries
4.3.1. Bulk
Entered when the charger is started, or when the battery voltage falls below 13,5 V / 27,0 V (due to a heavy load) during at least
1 minute. Constant current is applied until absorption voltage is reached (14.2 V / 28.4 V).
4.3.2. Absorption
After the absorption voltage has been reached, the charger operates in constant voltage mode.
The recommended absorption time is 2 hours.
4.3.3. Storage
After absorption charge the output voltage is reduced to storage level. This level is not sufficient to compensate for slow self-
discharge of the battery, but will maximize service life.
4.3.4. Weekly battery 'refresh'
Once a week the charger will enter Repeated Absorption-mode during one hour to 'refresh' (i. e. to fully charge) the battery.
5. MAINTENANCE
This charger does not require any specific maintenance. However an annual check of the battery and mains connections is
recommended.
Keep the charger dry, clean and free of dust.
6. TROUBLESHOOTING
Problem
Charger does not function
The battery is not fully charged
The battery is being overcharged
Battery temperature too high
Error in display
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Possible cause
The mains is not ok
Input or output fuses are defective
A bad battery connection
The wrong battery type has been selected in
the menu.
Cable losses too high
The wrong battery type has been selected in
the menu.
A battery cell is defective
Overcharging or too fast charging
See section 9
Solution
Measure mains: 120 - 240 VAC
Return product to your dealer
Check battery connection
Select correct battery type in the
menu.
Use cables with larger cross
section
Use external voltage sensing
Select correct battery type in the
menu.
Replace battery
Connect external temperature
sensor
Check all charging equipment
Check cables and connections