NLDC-40 Dual Battery Isolator And Charger

The NLDC-40 from National Luna is a DC to DC battery charger and isolator for a dual-battery system.  It will charge an auxiliary or service battery from a vehicle alternator, Solar panel or auxiliary DC source up to 40A output current.  Traditional 12V and 24V vehicle alternators as well as variable voltage alternators are supported.


  • True 40A output current
  • 6-stage intelligent charge algorithm
  • Supports AGM, Gel, Wet, Calcium, Lithium Ion/LiFePO4 batteries
  • Alternator input up to 32V
  • 40A, 600W MPPT solar regulator
  • Supports solar panels up to 42V
  • Separate auxiliary DC input up to 32V
  • Smart-alternator compatible
  • Battery temperature compensation for safe charging
  • Sealed to IP67 rating (waterproof)
  • Replaceable terminal block
  • Short-circuit protected
  • Reverse-polarity protected
  • Over-voltage protected
  • Over-temperature protected
  • Optional remote monitor

In the box:

  • NLDC-40 DC-DC charger
  • Universal mounting plate & fixtures
  • In-line fuses & holders
  • Temperature compensation probe
  • Ferrite ring (further reduces radio interference)
  • Installation kit including lugs and screws
  • Installation manual

Order Stock Code:

BMS-30400 (NLDC40 DC to DC only)
BMS-30401 (NLDC40 DC to DC plus monitor)

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