CTEK 12V Smartpass 120S Charger - 40-289

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Or 4 payments of $109.25 with AFTERPAY

Product Details

Power management system for starter and service batteries.

Smartpass 120S is a 120A Power Management Solution which distributes, controls and maximises the available energy from your alternator to power service batteries and consumers. SMARTPASS 120S handles all 12V batteries between 28-800Ah.

The Smartpass 120Ss Battery Guard function ensures that critical equipment such as radio, emergency lights and navigation systems always have power and take priority when the voltage on the service battery is low disconnecting non-critical consumers.

The unit’s Battery Guard will protect your service battery from total discharge and built in over temperature protection reduces charge current before the battery temperature gets too high. SMARTPASS 120S is compatible with the D250SA and D250SE 20A on board chargers.


  • Battery separation eliminates diodes and VSR relays
  • Fully automatic
  • Maximizes battery life
  • Battery Guard to protect your secondary battery from total discharge
  • Dynamic over current protection to handle temporary inputs and outputs of up to 350A for fast charging
  • Battery temperature protection for added safety
  • Splash and dust proof (IP65)
  • 2-year warranty

Part Number: 40-289

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About the Brand

The CTEK story began in a small village in Sweden, over 20 years ago. It is where the CTEK founder, inventor Bengt Wahlqvist, invented the first electronic pulse battery charger. Since then they’ve become one of the most popular battery chargers in the world, selling over a million battery chargers every year across 70 countries. The range of CTEK products and accessories are ideal for keeping both your vehicle and campsite power needs maintained with a great selection of products for almost every application. CTEK chargers are versatile with mounting and portable options available meaning you can get the most out of your charger in or out of the home garage.

The range not only covers both 12 & 24V options but most battery types as well. Making sure you have the right charger for your battery type is a must however most CTEK models covers popular battery types (lead-acid / lithium / AGM) which makes selecting the right one even easier. The chargers are also designed to be non-sparking, reverse polarity protected and short-circuit proof. Some models, like the MXS 25 12V charger, even have a battery reconditioning feature that helps restore deeply discharged batteries back to life. All products come with a 2-year manufacturer’s warranty.

A battery charger is an excellent investment when you have a 4WD vehicle. Depending on the specific product you choose, CTEK has different intelligent chargers for specific purposes like battery diagnosis, temperature sensing (ensuring optimised charging regardless of weather), and even continuous charging via power supply mode. CTEK battery chargers are designed for use with a range of vehicle types and sizes, including 4WDs, passenger vehicles, heavy vehicles and trucks, motorcycles, and even boats and other recreational vehicles. Designed with users in mind, the CTEK chargers are easy to operate and require minimal to no training - just plug and go.

CTEK has all of the add-ons for any vehicle, large or small to making charging convenient. CTEK accessories employ the patented 'CONNECT' system for a simple, safe, and secure connection to the charger. In addition, bumper, wall mount, solar panel charge kit, terminal, adapter cable, clamps, mounting bracket, and other accessories are available. So whether it is installing an auxiliary charging system in your rig or making sure your vehicles battery is reliably charged before your next adventure the range of CTEK chargers has something for you.

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