CTEK PRO25SE User Manual page 4

LEAD-ACID
1
NORMAL
15.8V
RECOND
15.8V
Time limit:
STEP 1 DESULPHATION
Detects sulphated batteries. Pulsing current and voltage, removes sulphate from the lead plates
of the battery restoring the battery capacity.
STEP 2 SOFT START
Tests if the battery can accept charge. This step prevents that charging proceeds with a defect
battery.
STEP 3 BULK
Charging with maximum current until approximately 80% battery capacity.
STEP 4 ABSORPTION
Charging with declining current to maximize up to 100% battery capacity.
2 3
Increasing voltage to
Max 25A until 12.6V
14.4V, max 25A
Increasing voltage to
Max 25A until 12.6V
14.4V, max 25A
8h 20h
4 5
Declining current Checks if voltage
14.4V drops to 12V
Declining current Checks if voltage
14.4V drops to 12V
16h 3 minutes
STEP 5 ANALYSE
Tests if the battery can hold charge. Batteries that can not hold charge may need to be
replaced.
STEP 6 RECOND
Choose the Recond program to add the Recond step to the charging process. During the
Recond step voltage increases to create controlled gassing in the battery. Gassing mixes the
battery acid and gives back energy to the battery.
STEP 7 FLOAT
Maintaining the battery voltage at maximum level by providing a constant voltage charge.
STEP 8 PULSE
Maintaining the battery at 95–100% capacity. The charger monitors the battery voltage and
gives a pulse when necessary to keep the battery fully charged.
6 7
13.6V
max 25A
Max 15.8V 13.6V
Max 1.5A max 25A
10days charge
Charge cycle restarts
2h or 6h cycle restarts if
voltage drops
8
12.9V–14.4V
20–1.2A
12.9V–14.4V
20–1.2A
if voltage drops
EN • 7