National Luna Intelligent Solenoid *Free Shipping*

National Luna

Intelligent Solenoid

Not compatible with Dual Battery Monitor

*Free Shipping to Continental (Lower 48) States U.S.A.*

The brains behind the dual battery management system, the Intelligent Solenoid manages the charging and isolation of your batteries for you automatically.  It can be installed with no modification to the vehicle's factory wiring system.

  • The Intelligent Solenoid (IS) senses an incoming voltage of greater than 13.1V when you turn on the vehicle.
  • The IS starts an internal timer for 5 minutes, keeping the full charge to the primary battery to recoup for the Intelligent Solenoid Functionsdischarge of starting the vehicle.
  • After 5 minutes, the IS automatically closes the circuit in the solenoid, allowing current to flow to the seecondary battery.
  • This connection remains closed until the IS senses a voltage of less than 12.7V across the system. This is most commonly when the vehicle is shut off. Brand new batteries can often maintain a charge above 12.7V for a while. The IS will keep the connection closed until less than 12.7V is available, then it will open the solenoid circuit isolating the batteries from one another.
  • The IS will keep the batteries isolated until it once again senses a voltage greater than 13.1V. Then it starts the timer and the whole process begins again.
  • This process is fully automated. You do not have to manually manage the charging of the second battery.



  • Simple installation
  • Low-loss solenoid
  • Automatic connection and isolation
  • Plug-in port for remote monitor
  • No ignition wiring necessary
  • Alternator over-load protection
  • Removed battery protection
  • Damaged battery protection
  • Short-circuit protection
  • 3 year comprehensive warranty
Item #3410
Physical size 5"L x 4.5"W x 2.75"H
Weight 1.25 lbs
Power supply  8Vdc - 15Vdc (display range: 11.4V - 14.2V)
Switched current 85 amp (continuous), 400 amp (peak)
Power consumption 40mA ave (standby), 780mA max (solenoid engaged)
Shipping Dims 11"L x 9"W x 5"H
Item BMS-20001/NLS380

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