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Ctek Smartpass 120S 12V DC-DC Controller

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.
Its 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 and will protect your service battery from total discharge and built in over temperature protection reduces charge current before the battery temperature gets too high. 

Please download specifications sheet here.

Please review user manual here.

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Excl. Tax: R 6,638.26 Incl. Tax: R 7,634.00

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Product Description



  • 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.
  • SMARTPASS 120S is compatible with the D250SA and D250SE 20A on board chargers.
  • Splash and dust proof (IP65).
  • 2-year warranty.

Technical data

  • Battery capacity: 28–800 Ah.
  • Charging category: DC charging.
  • Back current drain*: Corresponding to less than 7 Ah/month.
  • Battery voltage: 12 V.
  • Battery chemistry: Lead acid; Lithium-ion.
  • Ambient operating temperature: -20 ˚C to +50 ˚C.
  • Input: 11.5–23 V, 120 A (350 A temporarily for 10 seconds).
  • Output: 120 A (350 A temporarily for 10 seconds).
  • Battery types: 12 V:; WET; MF; Ca/Ca; AGM; EFB; GEL; LiFePO4
  • Degree of protection: IP65.
  • Dimensions (L x W x H): 192 x 110 x 65 mm.
  • Net weight (unit with cables): 0.7 kg.
  • Warranty: 2 years.

Additional Information

Additional Information

Disclaimer Please note that stock availability is subject to prior sales. Prices exclude delivery. The image serves as an example of what the product looks like and may differ slightly in appearance.
Guarantee/ Warranty 2 year product warranty
Amp Rating 20A


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