LiTime 12V 40A DC-DC Battery Charger with MPPT
Compatible with most alternators in vans, trucks, pickups, and other vehicles.
ALTERNATOR COMPATIBILITY: Compatible with traditional and smart alternators, with ACC control for reliable charging while driving.
DC-DC + MPPT 2-IN-1: Combines alternator and solar charging in one compact unit, with up to 99% MPPT tracking efficiency and 93% charging efficiency. Solar Input: 7–15.4V | Max PV Input Voltage: 26V | Up to 40A Charging
EMERGENCY REVERSE CHARGING: Allows the house battery to recharge the starter battery when needed, providing backup power for vehicle starting without additional charging equipment.
EASY INSTALLATION: Compact 7.44 × 5.83 × 1.89 in design with Anderson connectors and flexible horizontal or vertical mounting for easy installation in tight spaces.
Note: Use the included screws (Φ15/64'' [6mm], 15/32'' [12mm]) for secure mounting to prevent installation failure or product damage.
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BASIC
DIMENSIONS
TEMPERATURE
What is a DC-DC charger, and why do I need it?
A DC-DC charger allows you to safely charge a leisure battery from your vehicle's alternator while protecting both the alternator and batteries. It ensures efficient charging, especially in setups with lithium batteries.
What type of alternator is this DC to DC on board battery charger compatible with?
This battery charger is designed to work with both conventional and smart alternators. However, because conventional alternators maintain a consistent voltage during charging, while smart alternators adjust their charging output based on operating conditions, it is necessary to connect the charger to the smart alternator using the IGN Signal Wire provided with the package through the Vehicle Ignition Port.
What types of battery does the charger support?
It’s compatible with 12V Lithium, Gel, AGM, and Calcium batteries, providing a full 100% charge for each type. Additionally, it can jump start lithium batteries that have been discharged to low voltage levels.
What will happen if the service battery is fully charged?
The LiTime DC to DC Battery Charger with solar input, incorporates a Voltage Sensitive Relay (VSR). This feature enables the charger to perform Trickle Charging for the service battery, preserving its full charge, as well as to perform Trickle Charging for the starting battery using solar panels. Additionally, the VSR guarantees dependable isolation between the starting battery and service battery, preventing any charging interference.
Can I use this DC-DC charger while driving?
Absolutely. This DC-DC charger is designed to work while the vehicle is running, providing continuous charging to your secondary battery from the alternator.
How does this charger handle temperature variations?
The charger includes a temperature sensor to adjust charging based on ambient temperatures, optimizing charging and protecting batteries in both hot and cold conditions.
Why is my DC-DC charger not charging?
If your DC-DC charger isn't charging your LiFePO4 battery, even with normal or flashing lights, the issue is often related to wiring, settings, or vehicle voltage.
We've created a detailed troubleshooting guide to help you diagnose and fix the problem. You can find it here: DC-DC Charger Troubleshooting Guide
Super Safe and Easy Installation. Would absolutely recommend for a top choice for Vehicle Charging.
Would be nice to have bluetooth to see stats and higher solar input voltage, but great otherwise.
So far, everything is working great! I installed this DC-DC charger in my van and documented the entire process in a detailed video. If youre looking for a step-by-step guide, check out my install video here: How to Install a DC-DC Charger in Your Van | Ultimate DIY Guide!.
Ill update this review after some time to share how its holding up!
My second 40A dc2dc charger. This thing is awesome, works great. Couldn't be happier.
Needed this as an interface between mine and truck to charge as I drove.Easy to install and recommended by LiTime staff.
This simplified my electric install on my van by combining the dc to dc (charge while I drive) with the mppt (charge with panels while I'm parked) it saved me time and money by not having to buy and hook up a separate charge controler. We'll worth the money AWESOME PRODUCT, a must buy.
On time delivery, easy to use, easy to install and works great!
100% love it
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As the #1 LiFePO4 battery brand, LiTIme leads the market with the most complete power solutions—covering RVs, home storage, marine, golf carts, off-grid systems, and beyond.
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With 17 years of industry experience, LiTime serves over 350,000+ users globally, ensuring quality and trust. LiTime keeps innovating and has your back, always.
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With 24/7 expert support and an average 24-hour response time, we ensure you get the help you need, anytime. Whether it's pre-sales or after-sales, we guarantee 100% support every step of the way.
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LiTime is certified by top organizations like RVDA, backed by over 70+ patents and recognized for quality. Let authorities and patents prove why LiTime leads the way.
Industry-Leading Tech
With EV-grade cells passing 80+ tests and a self-developed BMS with under 1% margin of error, LiTime batteries ensure 15,000 cycles, 20+ protections, and up to 10 years of reliable performance.
Cutting-Edge Features
LiTime batteries offer a range of advanced features, including Bluetooth, low-temperature protection, self-heating, high-rate discharge, pre-charging, ensuring reliable power and peace of mind in any environment.User-Driven Power Stories
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