CTEK MULTI XS 25000 (12V) - Charge Characteristics
Using the CTEK MULTI XS 25000 gives your battery an optimum service life and operational reliability.
The CTEK MULTI XS 25000 charges and analyses in eight fully automatic steps.
- Stage 1: (Desulphation)
Runs a complete charge cycle within a fraction of a second. The cycle repeats during the whole desulphation phase. Every cycle recovers some lead sulphate into useful material. - Stage 2: (Soft Start)
Tests the battery condition. Severely discharged batteries need the soft start step. The charging continues for a maximum 4 hours until the voltage reaches 12V. - Stage 3: (Bulk)
This is the main step where most of the charge is returned (80%). The charger delivers maximum current (25A) until the battery voltage has risen to the set level (or for max 20 hours). - Stage 4: (Absorption)
Completes the charge up to 100% at a constant voltage (14.4V at 25°C). Concludes when the current drops below 3A, and a further 4 hours of forming. - Stage 5: (Analysis)
This is a short intermission in the charge cycle where the charger analyses the voltage drop and tests the self-discharge. The voltage of a defective battery will quickly drop. The charge cycle will be stopped with a warning indication if voltage drops to 25.2V in 2 minutes. - Stage 6: (Recond)
Used to recover severely discharged flooded batteries and for reconditioning severely discharged batteries suffering from stratification. The voltage increases (to max 15.9V) with reduced current (5A) for a limited time period (depending on the charge level of the battery at start). The higher voltage starts some gassing and mixing of the acid, which is beneficial for both battery capacity and expected life. The battery could emit explosive gas during this step. - Stage 7: (Float)
Maintenance charge at constant voltage, keeping the batteries at 100% charge. In normal charging mode, float is time-limited (max 10 days) while supply mode goes on indefinitely. Float can be used a few times per season. - Stage 8: (Pulse)
Maintenance charge. The state of charge varies between 95% and 100%. A pulse is sent out to the battery if the voltage drops. This keeps the battery in trim when not in use. The charger can be connected for months at a time.
