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Ctek 40-289 Smartpass 120S (0,7 kg)

12 Volt fully automatic Battery charger 5 step loading cycle
Battery capacity: 28 – 800 Ah (maintenance until 800 Ah)
Charging current: 80 A
The charger has as protection IP65.
With temperature compensation.

Ctek 40-289 Smartpass 120S (0,7 kg)

Ctek 40 289 Smartpass 120S (0,7 kg)

Ctek 40-289 Smartpass 120S (0,7 kg) is suitable for batteries of 12 Volt. The charger has a charging current of 80 A. It is a fully automatic 5 step loading cycle With temperature compensation. suitable for 12 Volt batteries from 28 – 800 Ah. Maintenance of batteries up to 800 Ah. The charger is protected against reverse polarity and short circuit. The charger has as protection IP65. Warranty: 2 years. Type of battery all types of lead acid batteries (standard, calcium, EFB, AGM and gel). Input voltage 11,5V-23V.

Battery voltage:12 Volt
Charge voltage:14,4, lithium Volt
Battery capacity:28 – 800 Ah
maintenance until800 Ah
Charging current80 A
Charging current:80
Type Battery charger:fully automatic 5 step loading cycle
Insulation:The charger has as protection IP65.
Warranty:2 years
Input voltage:11,5V-23V
Type of battery:all types of lead acid batteries (standard, calcium, EFB, AGM and gel).
kortsluitingbescherming:The charger is protected against reverse polarity and short circuit. With temperature compensation.

The company Ctek


Website Ctek

In the story below, the precursors of the current models are discussed.

These have the following changes:
- Compatible with a smart dynamo
- Has an AGM (14.7v) option
- Improved MPPT software
- Improved connection points / screws

- Always allow 120A through
- 350A 10 sec.
- 200A 3 min.
- 150A 22 min.
- Starting aid: the Smartpass 120 connects the service battery directly with the starter battery (for 10 seconds) when the starter battery has insufficient power to start the vehicle
- Improved connection points / screws

Below the story about how these two products work:

Ctek D250s Dual and Smartpass

The D250S and the Smartpass are two devices whose usefulness is not immediately clear. Read through the following and conclude that these devices are perfect for properly charging the batteries without a 230V connection. The devices are often easy to assemble. With these systems an intelligent charging system can be built in which the batteries are charged as optimally as possible via the dynamo or any 12v source.

Various practical situations are simulated below, with the difference coming to the fore after installing the D250s and Smartpass.


- Basic electricity on board
- The historical solutions
- The Ctek solution for 12V
- The Ctek solution for 24V

Basic installation

On the image below you will find the dynamo, a solar panel, a bow thruster and a power supply on the left. These four power generators charge the service battery, but also provide the consumers with energy (such as means of communication, lighting, refrigerator and starter battery).


The disadvantage of this situation is that the consumers and service batteries are simultaneously supplied with energy without separation. The flows are separated by using a Ctek Smartpass. This means that the battery is charged via the output battery and that the consumers are supplied with power via the other connection. The Smartpass therefore distinguishes between consumers and batteries. It is important that the battery is charged optimally, the battery can then be optimally deployed and has a maximum service life.


The example below shows the advantage that can be achieved with the help of the Smartpass.

Starting a large diesel engine at a temperature of 0 degrees requires such a power that the starter battery is properly discharged. It is important afterwards that the starter battery can be recharged as quickly as possible to keep the service life as optimal as possible. An uncharged battery will break. If the starter battery together with the consumers are directly connected to each other, the battery is not immediately fully charged because the consumers also draw power. By making a distinction between consumers and batteries, priority can be given to the battery.


The history, where did it go wrong?

The image below shows the original idea of the dynamo, starter battery and a starter motor. A simple setup where the starter motor gets power from the battery and the running engine sets a dynamo in motion so that it can recharge the starter battery.


Installations in cars, motorhomes and boats have become more luxurious over time. This means, for example, that lighting, a refrigerator and a radio are supplied with power. Because of these extra consumers, the starting battery is discharged faster and can therefore be destroyed more quickly.


To prevent a starting battery from discharging too quickly, an additional service battery (or on-board battery) has been used. Users such as refrigerator, lighting and radio then receive power from the starter battery and service battery. This relieves the starter battery more so that the original function of the starter battery is better guaranteed: namely starting the engine.


Later, more and more additions were made to boats and campers, for example air conditioners, solar panels, 230 volt charging systems, battery control systems, switches etc.



Because of all these additions, more problems have arisen with batteries and charging systems because many things are not aligned. Due to the various components that have been added, the following problems are common:
- Long charging time of the batteries via the alternator / alternator
- The engine must regularly run at idle to charge the battery
- The battery is never fully charged and this is at the expense of the usage time
- The battery will have to be replaced sooner because the service life is shortened
- The solar panel has an effect on other power sources, so that the efficiency is lower
- The starter battery is not charged by the solar panel
- The consumer battery can overheat due to incorrect charging
- In the event of problems, adjustment is expensive and difficult to adjust if necessary
- and above all the batteries are still not fully charged!

The graph below shows how a 145 Ah battery is charged with a maximum of 45A at a temperature of 25 degrees and a voltage of 13.8 volts. With these variables, it takes 8.5 hours to charge the battery 90%. An alternator of around 100A often delivers around half in practice.


When the charging voltage is increased to a voltage of 14.4 volts, a large time saving can be achieved. The battery is then 90% charged in 2.5 hours. The fact is that if the voltage (V) is increased with the same output of current (A), the energy supplied is much greater, the battery will then be filled up faster.


The graphs above are based on a loading temperature of +25 degrees Celsius. That is the most optimal condition for charging a battery. However, in practice, this temperature will often be lower or higher. At a lower temperature, for example 0 degrees, you can see from the graph below that charging with 13.8 volts means that even after 24 hours the battery is not yet 90% charged (just above 80%). At low temperatures the 13.8 volts is therefore much too low to be able to charge the battery.


The Ctek solution for 12V DC problems

Ctek has developed solutions for the aforementioned problems with the use of batteries, users and different charging voltages.

Below you will find the simplest solution in combination with the CTEK D250s dual charger. This intelligent charging system ensures that the starter and service batteries are charged independently of each other and the consumers are supplied with power. This means that both batteries cannot influence each other and therefore the capacity of the starter battery is retained.


Because the CTEK D250s Dual uses a cut-off, the starter battery is not addressed by the service battery with the consumers. The starter battery therefore remains fully available for its purpose: starting the engine. See the image below for clarification.


The moment the vehicle is started again, the D250s Dual will immediately ensure a correct charging voltage. In addition, the D250s dual has the advantage that the charging voltage temperature is compensated. The foregoing information has clearly shown that at a lower temperature a battery can be charged better with a higher voltage. A standard dynamo does not have this function. Thanks to this function of the Ctek D250s dual, the battery is charged as optimally as possible. At a temperature lower than 25 degrees the charging voltage is increased and at a higher temperature the voltage is lowered.


What makes the Ctek D250s Dual dual?
On the one hand, the dynamo can be connected to the D250s Dual, but it is also easy to connect a solar panel. In this way the D250s dual combines the currents of the dynamo and the solar panel as optimally as possible to achieve the highest possible efficiency from the solar panel. This keeps the charging voltage as optimal as possible when the vehicle is started. Below you can see at which position the solar panel can be connected.


The moment the vehicle is switched off, the electricity coming from the solar panel will be divided between the starting battery and the user battery. The starting battery will be maintained / charged by the D250S via pulse charging. By using the built-in Maximum Power Point tracker (mppt), optimum efficiency is achieved on the solar panel for the user battery in order to charge / maintain it as optimally as possible. See the image below for how this works.


The following restrictions apply to the D250s Dual: - Charging takes place with a maximum of 20A - If the load is shared with the consumer, the charging will also take longer

The graph below shows that the D250S continuously emits 20 A until the battery has reached a maximum voltage. The D250S will then gradually lower its voltage and charging current until the battery is fully charged (IUoU profile).


When the battery is connected directly via the D250s, the charging current is limited to a maximum of 20 A. The following graph clearly shows that the D250s has its max when the power comes from the alternator / alternator. Normally the alternator charges with a higher current and there the dynamo has an advantage over the D250s. The first 30 minutes the alternator will have a head start compared to the D250s, then the alternator will gradually go down to a lower charging current, making it virtually impossible to fully charge the battery in this way.


The disadvantage of the D250s can be that with large battery banks or deeply discharged batteries it is better to charge directly via the dynamo. The following graph shows that for a short period of time the direct connection of an alternator has a larger output on the battery, but you can also clearly see that for a longer period of time the D250S delivers a better continuous charging current.


The D250s has a limitation in charge current that remains for the battery when consumers are also connected to the battery. The maximum current output remains 20A in total. The graph below gives a clear insight into the effects of a load and consumer combination.


For this situation, Ctek has a solution on the market consisting of the Ctek D250s Dual and Smartpass.

Combination D250s and Smartpass

The Ctek D250s is also extremely suitable to be connected to the Ctek Smartpass. This connection creates even more options than just the D250s dual. Where the advantage of the D250s dual lies is that the starter battery and service battery can be optimally charged independently of each other. The Smartpass has the advantage that the maximum charging current of the alternator can also be used. We start again with the basic principle below. We link the D250s to the Smartpass. The alternator enters the Smartpass and from there to the D250s. From the D250s there is again a link to the Smartpass. This is then connected to the consumers and the service battery. The Smartpass routes the high charging current to the service battery from the alternator.


The lower currents will now run via the D250s. The combination with the Smartpass ensures that the charge is optimal by using the 30 min. Higher current output from the alternator, so that the starter battery and service battery are charged with a boost and then charged via a continuous charging current via the D250s via the IuoU profile.


The total charging time will be reduced by combining the D250s and the Smartpass. This is good to see if you look at the green line on the graph below in the image.


There is an extra output on the Smartpass. This makes it possible to make a distinction between consumers based on priority. For example, the lighting and the refrigerator can then be separated from the consumers on the service battery. See the image below for clarification.


The moment the vehicle is switched off, power will be supplied to the Smartpass from the service battery in order to be able to feed the small consumers. This is indicated by an LED on the Smartpass. The image below shows how the electricity flows from the service battery to the main consumers and via the Smart Pass to the small consumers.


To prevent the service battery from being damaged by deep discharge, protective devices have been built into the Smartpass. For example, with a deeply discharged service battery, the non-critical consumers powered separately by the Smartpass will be switched off so that the service battery will not malfunction. The service battery is therefore protected via the Smartpass together with the necessary consumers.

Just as with the connection of the solar panel only to the D250s, the solar panel will also charge the starter battery and service battery if it is in combination with the Smartpass. The non-critical consumers will not receive any voltage via the solar panel, which is shielded from this by the Smartpass. See also the image below how these currents run from the solar panel via the D250s and the Smartpass. Follow the red lines for this.


Overheating of the service battery must also be prevented. Overheating can have various causes, such as the age of the battery, a too powerful alternator or the ambient temperature. To prevent this, the Smartpass has a heat sensor that must be placed on the battery.


The Smartpass disconnects the connection from the alternator to the battery. This prevents the battery from overheating. Because the D250s has dual temperature compensation, it will still try to charge the battery with an adjusted voltage and amperage.


Connection of a charger via 230 volts
The 230V (AC / DC) charger can charge both the user battery and the starter battery provided that this connection is connected to the battery output via the Smartpass. The Smartpass will control the charging current in this way. Provide a charger that provides sufficient power to charge the total battery bank.


Dual dynamo
Two alternators / alternators are also no problem for the D250s Dual and Smartpass solution. Each alternator charges 1 battery each separately. The alternator that supplies power to the starter battery is connected to the small-scale consumer on the Smartpass and as a result can deliver its overcapacity to the consumers, resulting in the least possible loss of energy (higher efficiency).


The image below shows an example situation where all possibilities are included to distribute the energy as optimally as possible for charging via solar panel, dynamo, D250s, Smartpass and 230 volt charger.



Ctek 40 289 Smartpass 120S (0,7 kg)

LaderBattery voltageCharge voltageBattery capacitymaintenance untilCharging currentType Battery chargerInsulationWarrantyInput voltageType of batteryProtectiontemperatur compensationSupplyfunction
56-731 Multi XS 7.012 V14,4 /14,7 /13,6 /15 V14 - 150 Ah 225 Ah 7 A fully automatic 8 step loading cycle The charger has as protection IP65. 5 years 220–240VCA, 50–60Hz all types of lead acid batteries (standard, calcium, EFB, AGM and gel). The charger is protected against reverse polarity and short circuit. with supplyfunction
56-855 Multi XS 5.0 Polar12 V14,4 /14,7 /15,8 V1.2 - 110 Ah 160 Ah 0.8 /5 A fully automatic 8 step loading cycle The charger has as protection IP65. 5 years 220–240VCA, 50–60Hz all types of lead acid batteries (standard, calcium, EFB, AGM and gel). The charger is protected against reverse polarity and short circuit.
56-30512 V14,4 /14,7 /15,8 V1.2 - 110 Ah 160 Ah 0.8 /5 A fully automatic 8 step loading cycle The charger has as protection IP65. 5 years 220–240VCA, 50–60Hz all types of lead acid batteries (standard, calcium, EFB, AGM and gel). The charger is protected against reverse polarity and short circuit. With temperature compensation.
56-89912 V13,8 /14,4 V5 - 60 Ah 120 Ah 5 A fully automatic 8 step loading cycle The charger has as protection IP65. 5 years 220–240VCA, 50–60Hz Lithium-Ion Phosphate (LiFePO4). The charger is protected against reverse polarity and short circuit.
40-31512 V14,4 14,7 V40 – 300 Ah 300 Ah 20 A fully automatic 5 step loading cycle The charger has as protection IP65. 2 years 11,5V - 23V all types of lead acid batteries (standard, calcium, EFB, AGM and gel) Lithium-Ion Phosphate (LiFePO4). The charger is protected against reverse polarity and short circuit. With temperature compensation.with supplyfunction
40-28912 V14,4, lithium V28 – 800 Ah 800 Ah 80 A fully automatic 5 step loading cycle The charger has as protection IP65. 2 years 11,5V-23V all types of lead acid batteries (standard, calcium, EFB, AGM and gel). The charger is protected against reverse polarity and short circuit. With temperature compensation.

Warranty Ctek

2 years Warranty

Ctek has a strict dealer network. We are a registered dealer of this brand. If you unexpectedly have a problem with the products purchased with us, the problem with the product will be resolved as soon as possible. We will ask you to send an email in which you describe the problem. You will then receive further questions, or a guarantee number and a step-by-step plan on how we can solve the problem.

Many faults on a product such as a mover can easily be rectified by telephone explanations from our technicians. A common problem is, how do I turn on the remote control ... and if that is successful, how do I automatically move the reels to the belt. It seems simple; but every product is protected against accidental use and after a year it is often unclear how it worked again.

As a rule, you can not contact the manufacturer or importer directly with this brand.

Spare parts

If you have damage, or if there are problems after the warranty period, the brands PowrMover, Reich, Truma, and AL-KO offer an almost complete range of spare parts. So, if you have a small problem after the warranty period, you don't have to buy a whole new mover. You can often solve the problem with a separately ordered spare part. The spare parts of most movers are guaranteed available for 10 years. In addition, we have the most extensive range spare parts used and new in stock.

Demonstration days CaravanMoverShop

Regulairy we have promotion days in our shops. You can show you the differences between the products of Reich, AL-KO, Truma and PowrMover. You can also see us at one of the exhibitions in Western Europe. Or please visit any of our Shops in varshops during our opening hours. The following promotiondays are on:

Saturday 06 march 2021 (10.00 - 14.00) NL-Groningen, NL-Lelystad
Saturday 20 march 2021 (10.00 - 14.00) NL-Groningen, NL-Lelystad

CaravanMoverShop at the exhibitions

You can find us at the following exhibitions:
2021 august

DE-Duesseldorf, 27 august 2021 - 05 september 2021, Caravan Salon

2021 october

DE-Erfurt, 28 october 2021 - 31 october 2021, Reise und Caravan

2022 january

NL-Leeuwarden, 26 january 2022 - 30 january 2022, Caravana

2022 february

DE-Essen, 16 february 2022 - 20 february 2022, Reise und Camping




Advertisements from CaravanMoverShop

We are, as our name says, a caravan mover shop. Here at CaravanMoverShop we sell a select range of high quality caravan movers from respected manufacturers such as AL-KO, Reich, PowrWheel/PowrMover and Truma. We also offer a range of premium batteries and battery chargers for your mover. Our expert knowledge means we are always able to recommend the perfect mover for you. Our product range is also available at all four or our branches so you are free to shop in store or online. We dispatch our orders daily (Monday-Friday) to reach you as quickly as possible. We provide comprehensive and up to date information about all of our products in here on our website. If you require further information or have any questions, please send us an email. We can also be contacted by telephone (0031-857843666) every day. In the past we advertised in the following magazines Camping Cars and Caravaning, Reisemobil, Kampeer en Caravan Kampioen (KCK), ACSI Freelife Magazine und Campingvizier.

ANWB Kampeer
en Caravan Kampioen

kck advertentie

Ordering information

Price and order

Our price: € 349.00

Article number: 44987
EAN code: 7340103402893

Manufacturer's ID: 40-289

Phone and e-mail

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