CTEK D250S Dual User Manual

7
EN
SOLAR PANEL
SMALL SERVICE BATTERY
INSTALLATION SHEET 1 INSTALLATION SHEET 2
SITUATION
Solar panel
PROBLEM
A solar panel with 36 cells
produces maximum power at
about 17V. Many regulator
reduce the voltage by
“burning off” energy.
SOLUTION
The D250S DUAL searches for
the Maximum Power Point and
charges the battery perfectly
with very high efficiency.
TIP 1
Mount the temperature sensor
on the Service battery.
Boat: All installation should
be done in accordance with

SITUATION

Starter battery and a small
Service battery
PROBLEM
The Service battery will take
a very long time to recharge
due to low alternator voltage.
Due to this, the battery
will underperform and die
prematurely.
SOLUTION
The D250S DUAL charges the
Service battery quickly and
very efficiently. The battery
will be fully charged, produce
more and last significantly
longer
TIP 2
Refer to Tip 1.
Alternators with voltage sensor
cables should connect this on
the Starter battery
3. Caravan/trailer: For
13-pole contact, connect
D250S DUAL alternator
battery + to pin #9. Connect
pin #13 to D250S DUAL
vehicle ground –.
D250S DUAL
12V
+OUT
+IN
+IN
D250S DUAL
12V
+OUT
+IN
+IN
WARNING!
•Max 22V input
•Do not connect two solar
panels in series
WARNING!
- Max 22V input

CTEK D250S Dual Specifications

General

Charging Current	20 A
Operating Temperature	-20°C to +50°C
Protection Class	IP65
Battery Capacity	40–300 Ah
Battery Types	Lead-acid (Wet, MF, AGM, GEL)
Protection Features	Reverse polarity protection, over temperature protection
Input Voltage	11.5-23V, DC
Charging Stages	5-stage, Automatic