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22 Year Experience

National luna dc to dc charger-40amp (includes monitor)


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.

NLDC40 DC to DC plus monitor

SKU: BMS-30401 Category:



  • 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
  • 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
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