Smart Battery Isolators

Smart Battery Isolators

Prevents loads on auxiliary battery from draining the starting battery, a Smart Isolator is more flexible than traditional Battery Isolators:

  • It works with all types of alternator.
  • Smaller and lighter than traditional isolators.
  • There are no efficiency losses due to diodes.
  • It allows bi-directional charging from the alternator or from shore power.
  • It reduces the load on the charging system by not connecting the auxiliary battery until the primary battery is charged to 13.2V. This extends the life of expensive charging components.

48525 85A at 12V DC
48530 200A at 12V DC

Simple to install – connect to starting battery, auxiliary battery and ground. Optional start assist: momentary switch allows the auxiliary battery to assist the starting battery. LED status indicator.


  • Operating temperature range:  -40 to 85ºC.
  • Ingress protection: IP66 per IEC,
  • (high pressure wash resistant).
  • Humidity:  to 90% RH.
  • Vibration: 10-500Hz per SAE J1455.
  • Shock & thermal shock: per SAE J1455.
  • EMI/RF: Per SAE J1455 & J1113.
  • Battery terminals torque: 50 in-lbs (5.78Nm).
  • Normal input voltage: 9V min, 16V max.
  • Continuous current: 48525 85A; 49530 200A.
  • Connect voltage: 13.2V typical after two minutes at this level.
  • Disconnect voltage: 12.7V after one minute at this level.
  • Quiescent current: 5mA typical, 8mA max.
  • Relay off, start signal input open or grounded.


Battery Management Products