CTEK D250SE, SMARTPASS 120S User manual

USER MANUAL

CTEK DC/DC BATTERY CHARGER D250SE
AND 12V POWER MANAGEMENT SYSTEM SMARTPASS 120S
FOR LEAD-ACID AND LITHIUM-ION BATTERIES

FULLY AUTOMATIC

2 YEAR WARRANTY

ENDEFRESITNLSVDANOFIPLJAKOZH

12V

MANUAL

CONGRATULATIONS

on the purchase of your new CTEK charger providing professional battery care. This charger is
included in a series of professional chargers from CTEK SWEDEN AB and represents the latest
technology in battery charging. With the CTEK D250SE and SMARTPASS 120S you can be sure of
getting maximum performance from your dual battery system.

SAFETY

CALIFORNIA PROPOSITION 65

WARNING: This product contains chemical known to the state
of California to cause cancer or reproductive toxicity.

• The D250SE and SMARTPASS 120S have been developed for 12V lead-acid and LFP batteries.
Do not use the unit for any other type of battery.

• Wear protective goggles when connecting and disconnecting batteries.

• Batter y acid is corrosive. Rinse with plenty of water immediately if you get acid on your skin or in
your eyes. Get medical assistance.

• Never use a charger with damaged electric cables. Check that the cables have not been dama­ged by hot surfaces, sharp edges or in any other way.

• Explosive gases are generated while lead-acid batteries are being charged. Avoid any sparking
near the battery. Use in a well-ventilated location.

• Never place the charger above the battery, and avoid covering the charger during charging.

• Disconnect the battery terminal posts before installing.

• The D250SE and SMARTPASS 120S are not spark-free.

• The installation must include a fuse in accordance with the recommendations in the table
”CABLE AND FUSE RECOMMENDATIONS”.

WARNING!

The D250SE and

SMARTPASS 120S are not

protected against reversed

polarity.

Remember that all installations in boats must comply with ISO 10133!

1. The cabling from the batteries must have fuses near the batteries.

2. The batteries must be securely fastened in a ventilated space.

3. The cabling must be run through pipe ducting, separately from 230V/110V wiring (mains power),
or secured by clips at every 30 cm/1 ft.

4. Cabling in the engine compartment must be temperature rated at 70C/ 158F.

WARNING!

Check manual of Lithium-ion

battery before installing in

vehicle.

D250SE

Input Solar panel Earth Connection

+IN

Input Alternator

+IN

SMARTPASS 120S

Input Alternator

+IN

+IN

SMARTPASS 120S

Connector plate

Temperature sensor 2 m/6 ft.

Smart alternator cable (red) 0.2 m/0.6 ft.

Output Service battery

+OUT

Output Service battery

+OUT

+OUT

+OUT

Output Consumers

+OUT

Smart alternator cable (red) 0.2 m/0.6 ft.

Temperature sensor 2 m/6 ft.

Battery select cable (black)

0.2 m/0.6 ft.

Negative cable connection

(black) 0.2 m/0.6 ft.

EN•3

EN

D250SE

• The D250SE is a DC to DC battery charger for a dual battery system with a starter battery and a
service battery.

• The D250SE charges the service battery either from an alternator or from a solar panel, or from a
combination of both.

• The D250SE separates the batteries in a dual battery system and thereby replaces, for example, a
separation relay, VSR (Voltage Sensitive Relay), diode isolator or a mechanical battery selector.

• The D250SE can be used on its own or in combination with SMARTPASS 120S. In combination,
the D250SE and SMARTPASS 120S can charge at up to 140A.

• Starter battery is only available as lead-acid battery.

FUNCTIONS:

• Charging service battery from a conventional alternator (constant charging voltage)

The D250SE charges a service battery at up to 20A from the start battery when a conventional
alternator is running. This function is switched off when the engine is not running to prevent
discharge of the starter battery.

• Charging of a service battery from a smart alternator (with variable charging voltage)

The D250SE can charge a service battery at up to 20A from the starter battery when a smart
alternator is running. This function is switched off when the engine is not running, so as not to
discharge the starter battery. The Installation section describes how the D250SE needs to be con­nected in order to activate the smart alternator functions.

• Charging a service battery from a solar panel

The D250SE can charge and trickle charge a service battery from a solar panel at up to 20A. The
D250SE uses MPPT (Maximum Power Point Tracker) to maximise the power from the solar panel.

• Separation of the starter battery and the service battery

The D250SE separates the starter battery from the service battery when the engine is not running.

• Temperature compensated charge voltage

The D250SE optimises the charge voltage by increasing the charge voltage at temperatures below
25°C/77°F and reducing it at temperatures higher than 25°C/77°F. The function is active in
AGM and NORMAL programs only.

• Trickle charging of the starter batter y from a solar panel

The D250SE trickle charges the starter battery from a solar panel at intervals of 3 seconds if the
service battery is fully charged.

• Optimised charging of AGM batteries

The D250SE can provide a suitable charging voltage for optimal charging of AGM (Absorbent
Glass Mat) batteries, which require a higher charge voltage than other types of lead-acid battery.
The installation section describes how the D250SE needs to be connected in order to activate the
AGM battery function.

• Optimised charging of Lithium batteries

The D250SE can provide a suitable charging voltage for optimal charging of Lithium batteries.

SMARTPASS 120S

• SMARTPASS 120S is a solution for supplying current to charge and manage consumers in a dual
battery system consisting of a starter battery and a service battery.

•

SMARTPASS 120S separates the batteries in a dual battery system and thereby replaces, for exam-

ple, a separation relay, VSR (Voltage Sensitive Relay), diode isolator or a mechanical battery selector.

• SMARTPASS 120S connects the starter and service batteries together in order to charge them both
from the alternator.

• SMARTPASS 120S protects the service battery from deep discharge which would damage the
battery.

• SMARTPASS 120S supplies consumers from the alternator instead of from the service battery while
the service battery is charging, which permits faster charging.

• SMARTPASS 120S can be used on its own or in combination with D250SE. In combination, the
D250SE and SMARTPASS 120S can charge at up to 140A.

FUNCTIONS:

• Charging service battery from a conventional alternator (constant charging voltage)

The SMARTPASS 120S charges a service battery at up to 120A from the start battery when a
conventional alternator is running. This function is switched off when the engine is not running to
prevent discharge of the starter battery.

• Charging of a service battery from a smart alternator (with variable charging voltage)

The SMARTPASS 120S can charge a service battery at up to 120A from the starter battery
when a smart alternator is running. This function is switched off when the engine is not running,
so as not to discharge the starter battery. The Installation section describes how the SMARTPASS
120S needs to be connected in order to activate the smart alternator functions.

• Battery guard
SMARTPASS 120S disconnects consumers when the service battery voltage is low in order to
avoid deep discharge, which would damage the battery. The consumers are reconnected after the
service battery voltage has increased. Connect critical consumers directly to the service battery so
they will not be disconnected if the voltage falls to lower than 11.5V.

• Start assistance
SMARTPASS 120S automatically connects the service battery to the starter battery for 10 sec to
assist, if the starter battery on its own is unable to start the engine. After the start assistance func­tion has been activated, SMARTPASS 120S will display a fault indication until starting has been
achieved without using the start assistance function.

• Separation of the starter battery and the service battery

SMARTPASS 120S separates the starter battery from the service battery when the engine is not running.

• Assigning current source priority
SMARTPASS 120S can sense when the alternator is running and in that case supplies consumers
with current from the starter battery to work with the D250SE and maximise charging efficiency.
Otherwise the consumers are supplied with current from the service battery.

• Dynamic overcurrent protection
SMARTPASS 120S has overcurrent protection to shield the product. Overcurrent protection permits
up to 350A to be sent from the alternator temporarily so that charging will be accelerated.

4•EN

+OUT

+OUT

+OUT

+OUT

• Battery temperature protection
SMARTPASS 120S protects the battery by switching off charging if the service battery temperature
rises too high.

• Starter battery trickle charging
The service battery trickle charges the starter battery without assistance from the solar panel or
alternator to compensate for the self-discharge of the starter battery. The service battery charges in
3-second pulses when its voltage is higher that of the starter battery and the voltage of the starter
battery is low.

FUNCTION INDICATIONS

D250SE Explanation

1

2

The service battery is being charged by the alternator.

The ser vice batter y is being charged by the solar panel.

EN

CABLE AND FUSE REQUIREMENTS

MIN. C ABLE SIZE

0.5 m

1 m

2 m

5 m

2 ft

3 ft.

4 mm2/

AWG12

6 mm2/

AWG10

4 mm2/

AWG12

6 mm2/

AWG10

35 mm
AWG2

35 mm
AWG2

4 mm2/

AWG12

2

2

6 ft.

4 mm2/

AWG12

10 mm2/

AWG8

4 mm2/

AWG12

10 mm2/

AWG8

35 mm
AWG2

35 mm
AWG2

4 mm2/

AWG12

2

2

UNIT CABLE

4 mm2/

AWG12

4 mm2/

AWG12

4 mm2/

AWG12

4 mm2/

AWG12

35 mm
AWG2

35 mm
AWG2

4 mm2/

AWG12

2

2

+IN

+IN

+OUT

D250SE

Connector plate*

+IN

+OUT

+OUT

120SA

SMARTPASS

*If the D250SE and SMARTPASS 120S are installed in different locations and the accompanying connector plate is
not used, please follow the recommendations in the table.

15 f t.

6 mm2/

AWG10

4 mm2/

AWG12

10 mm2/

AWG8

50 mm

AWG1

4 mm2/

AWG12

2

10 m

30 ft.

10 mm2/

AWG8

4 mm2/

AWG12

10 mm2/

AWG8

50 mm
AWG1

4 mm2/

AWG12

30A

30A

2

300A

300A

FUSE

3

4

5

1

2

3

4

SMAR TPASS

120 S

The ser vice batter y is being charged by both the alternator and
solar panel.

The ser vice batter y is fully charged. The star ter battery is being
trickle charged by the solar panel.

Current saving mode, no charging in progress.

Explanation

Current from alternator to service battery and consumers.
Current from service battery to consumers.

Current from alternator to service battery and consumers.

Current from alternator to consumers. The ser vice batter y is
charged by the D250SE.

Trickle charging of the starter battery from the service battery.

EN•5

INSTALLATION

1. Install the apparatus on a smooth surface where it can be fi rmly secured and where it is not
exposed to fuel, oil or dirt. To obtain the correct distance, start by fi tting the two units together
with the accompanying connector plate (see Figure 3) before they are fi nally fastened to the
smooth surface.

2. Secure the apparatus with, for example, M4 or ST4.2 screws at each corner (see Figure 1).

3. Before connecting the cables, ensure that the negative terminal post on the battery is not connected.

4. Connect the cables to the apparatus connections by securing screws (M8) (see Figure 2).
Use an Allen key - tightening by hand without a tool is not
enough. Max 6 mm ring terminals (see fi gure 5).

5. Use tape (see Figure 4) to secure the temperature sensor
to a clean fl at surface above the service battery. Position the
sensor as close to the positive terminal post as
possible.

Figure 4

6. Connect the battery negative terminal post.

WARNING!

The D250SE and

SMARTPASS 120S are not

protected against reversed polarity.

Disconnect the battery terminal

posts before installation.

WARNING!

The D250SE and

SMARTPASS 120S are not

spark-free.

Ensure good ventilation.

DIMENSIONS

Figure 3

120mm/4.72 inches

240mm / 9.44inches

210mm/8.29 inches

Ø4,9 mm

0.19 inches

90mm/3.57 inches

168mm/6⅝ inches

RECOMMENDED TIGHTENING TORQUES

Figure 1

2 Nm/18 lb-in

6•EN

Figure 2

Allen key

8 Nm/71 lb-in

Max 6 mm

Figure 5

250mm / 9.84inches

Max 6 mm

65mm / 2.53 inches