- Description
- Shipping & Returns
- Why Buy From Us
Description
National Luna NLDC-40 DC-DC 40Amp Charger
The National Luna NLDC-40 is a DC-to-DC battery charger and isolator for dual-battery systems, capable of charging from a vehicle's alternator, solar panel or auxiliary DC source up to 40A output current.
It supports traditional and variable 12V and 24V vehicle alternators, and its integrated MPPT solar controller maximizes output power up to 600W, handling solar panel input voltages up to 42V.
The charger is compatible with all Lead-Acid and automotive Lithium-Ion batteries, thanks to its 6-stage charge algorithm.
In addition to the alternator and solar inputs, the NLDC-40 features a dynamic DC power input for voltages from 11V to 32V. Its advanced load-response algorithm allows it to support alternative DC sources with variable power levels (such as AC-DC power supplies, wind generators or DC generators).
It automatically switches between input sources and includes three safety stages to detect damaged batteries.
Temperature compensation ensures safe and full charging under various conditions, and it also supports the connection of a remote monitor that can display system and battery information.
The NLDC-40 is built for harsh environments with an IP67 (waterproof) rating and protection against reverse polarity, over-voltage, over-temperature, and over-current conditions.
Order yours online today!
What's Included
Avoid the headaches! - Everything you need is included with the National Luna DC-40 DC-DC 40Amp Charger and more!
- 1x NLDC-40 DC-DC 40 Amp Charger
- Universal mounting plate & fixtures
- In-line fuses & holders
- 1x Temperature compensation probe
- 1x Ferrite ring (further reduces radio interference)
- 1x Installation kit including lugs and screws
- 3-Year Limited Warranty
- Ships in 1-3 Business Days
- 30-Day No Stress Returns
- FAST & FREE SHIPPING To The Lower 48 States
NLDC-40 DC-DC 40Amp Charger Features
- Charging Capability - Charges auxiliary or service battery from vehicle alternator or solar panel up to 40A output current
- Supported Alternators - Traditional 12V and 24V and variable voltage alternators
- Solar Controller - Integrated MPPT, maximum output power of 600W, supports solar panel voltages up to 42V
- Charge Algorithm - 6-stage, suitable for Lead-Acid and automotive Lithium-Ion batteries
- Additional Inputs - Dynamic DC power input accepting voltages from 11V to 32V
- Load-Response Algorithm - Supports DC sources with variable power levels, compatible with AC-DC power supplies, wind generators, or DC generators
- Automatic Switching - Between input sources based on availability
- Safety Stages - 3 stages to analyze the battery and detect damaged batteries
- Temperature Compensation - Optimizes charge output for safe and full battery charging under various conditions
- Remote Monitor Support - Connects to a high-contrast LCD screen displaying system and battery levels information
- Environmental Rating - IP67 for harsh environments
- Protection - Against reverse-polarity, over-voltage, over-temperature, and over-current conditions.
NLDC-40 DC-DC 40Amp Charger Specifications
| Features | Specifications |
|---|---|
| Dimensions | 7” W x 6.3” H x 2.3” D |
| Battery Compatibility | Lead-Acid and Automotive Lithium-Ion |
| Environmental Rating | IP67 (waterproof for harsh environments) |
| Output Current | 40Amp |
| Supported Alternators | 12V, 24V and variable voltage alternators |
NLDC-40 DC-DC 40Amp Charger Instruction Manual
Do you need more information about specifications, installation, care, etc.? Check out the Instruction Manual or download it by clicking the PDF icon!
Shipping & Returns
FREE SHIPING on orders above $250
Shipping is FREE on most orders with a total value above $250 to customers within the lower 48 United States (Contiguous United States). NOTE: For Front Runner orders, Free Shipping to the lower 48 states ONLY applies to rack kits and orders with a total value above $1,500
However, due to their size and weight, some products may require an LTL truck flat fee shipping charge based on the zone you live in. This flat fee rate will be calculated at checkout, but ONLY for certain brands and products.
Products where the LTL truck flat fee may apply are rooftop tents, roof racks, awnings, bumpers, bed racks, rock sliders, fridges, and drawer systems.
Brands where Flat Fee Shipping based on zones apply:
- Backwoods Adventure Mods
- BA Tents
- Body Armor
- CBI
- Eezi-Awn (only residential addresses)
- Front Runner / Dometic (FREE SHIPPING to the lower 48 states ONLY applies to rack kits and orders with a total value above $1,500)
- Prinsu
- TruckVault (only residential addresses)
- Tuff Stuff
- 23zero
Please refer to the zone map displayed below for your location.
Read more about the terms and conditions that apply in our Shipping Policy
30-Day Easy Returns
As experienced Overlanders, we fully understand that things do not always go according to plan.
That is why we offer you our "No Questions Asked" 30-Day Return Policy, so you can get back on the road for more adventures in a heartbeat.
Read more about the terms and conditions that apply in our Easy Returns Policy
Why Buy From Us
We know you have plenty of options when shopping for Overlanding gear online, so why choose Open Road Overland? Because we’re more than just a store—we’re your trusted partner for every adventure. Here’s why shopping with us is a game-changer:
REASON #1 - TRUST AND SECURITY - SHOP WITH CONFIDENCE
Your security is our top priority. We use encrypted SSL technology and are Level 1 PCI DSS compliant, ensuring your transactions and personal information are always protected. When you shop with us, you can trust that your data is safe and your purchase is secure.
REASON #2 - REAL-WORLD TESTED QUALITY - GEAR YOU CAN RELY ON
We’ve been Overlanding since 1998 — long before it became a buzzword. With 25 years of experience testing gear in the toughest conditions across six continents, we only sell products we would use ourselves. If it’s in our store, it’s been trail-tested and approved.
REASON #3 - EXPERT ADVICE - BECAUSE EXPERIENCE MATTERS
No matter what you drive—a passenger car, pickup truck, or a fully rigged 4x4—we have the knowledge to help you build the perfect setup. Our team has driven nearly everything and can guide you toward the best gear for your specific adventure needs.
REASON #4 - HASSLE-FREE SHOPPING - BECAUSE YOUR TIME MATTERS
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Fast and FREE Shipping on most orders above $250 to the lower 48 states
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30-Day Easy Returns. Not happy with your product, we'll take it back no questions asked, and without charging you ANY restocking fee. Ever!
REASON #5 - GREAT CUSTOMER SERVICE - WE'VE GOT YOUR BACK
We don’t just sell gear — we build relationships and pride ourselves on providing the best service, anywhere. Our dedicated Customer Service team is made up of real Overlanders who understand your needs and are ready to help with expert advice, product recommendations, and troubleshooting. Whether you have a question before purchase or need support after, we’re always here to ensure your experience is seamless and stress-free.
REASON #6 - A COMMUNITY THAT CARES - OVERLANDING FOR EVERYONE
Whether you’re a beginner just starting out or a seasoned pro pushing the limits, we believe Overlanding should be accessible to all. That’s why we offer both entry-level products and top-tier gear, ensuring every adventurer finds what they need. More than that, we’re here to help, guide, and support you every step of the way.
