• Compact, lightweight and stylish design
  • 88% efficient
  • 5 step profile for effective charging
  • Power supply mode
  • Dual isolated output (total 40A)

Smart, compact and innovative TBB Power Trident 40A 12V Smart Battery Charger that looks after your on board batteries

The BS range is a very stylish, compact and feature packed to ensure they meet all the demands for modern battery charging.

The BS1240 is designed to be highly efficient (up to 88%) and features two isolated outputs enabling independent charging of two battery banks up to 40A total. A separate slave charger output of 3A also provides independent support to charge a starter battery.

Multi functional smart buttons allows easy programming of the charger for battery type, mode (charging or power supply) and user definable output current.

The AC input cable is supplied (1.4M) just requiring the addition of output cables - the M4 terminals will accept cable size up to 16mm2

Built in voltage compensation and temperature compensation via the included temperature sensor ensure the most accurate and efficient charging of your battery no matter the chemistry type - The BS range provides 5 step charging profiles for AGM, GEL, wet lead acid and specific profile for Li-ION batteries.

Multi functional smart buttons for easy set up - fit and forget and remembers even after power down


  • Input (AC) : 165VAC - 265VAC
  • Output Voltage (Absorption) : AGM : 14.4V GEL: 14.1V LFP: 14.4V WET : 14.7V
  • Output Voltage (Floating) : AGM : 13.5V GEL : 13.5V LFP : 13.5V WET : 13.7V
  • Outputs : 2
  • Charging current : 40A total
  • Slave charger : 3A
  • Efficiency : 88%
  • Minimum battery voltage : 2V
  • Cooling : Fan
  • Case : Aluminium + plastic
  • Output connectors : M4 screw (16mm2)
  • Operating Temperature : -20°C to +60°C