Power Queen LiFePO4 BatteryPower Queen LiFePO4 BatteryPower Queen LiFePO4 Battery

Power Queen 12V 40A DC to DC Battery Charger


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  • Dual Input Charging】Power Queen 12V DC-DC battery charger supports charging the service battery through two methods, the starter and solar panels, achieving 100% fully charged on the service battery. The advanced built-in MPPT function of the charger maximize the solar power and brings a high charging efficiency at a proper voltage and charging phase.  

  • High-level Safety Secured】Power Queen DC-DC charger can protect the battery from over-charging, over-voltage, over-temp, and reverse polarity, and it has BMS protection for LiFePO4 batteries. Besides, this charger can activate the LiFePO4 battery when the BMS inside the battery shuts off. Under certain conditions, the service battery is able to charge the starter battery, protecting the starter battery & alternator from damage.

  • Great Compatibility & More Options】Power Queen 12V DC-DC on-board charger is compatible with various battery types, such as AGM, Gel, SLA, CA, and Lithium batteries, offering you more options and a more flexible lifestyle. The charger is able to meet your multiple needs for charging the service battery in various application scenarios, such as RV, trailer, camper, truck, yacht, marine, etc.

  • Exquisite Design & Simple Operation】Small, light and exquisite, Power Queen DC-DC charger has a compact design and the dimensions are 5.83*1.89*7.44 inches, so it can save more space for your vehicle.The additional components, Anderson connectors, bring simple connection and operation in the installation process, less trouble for you during setup.The visual LED indicators let you quickly know the charging status.

  • 2-Year Warranty & 24 Hours Timely Service】Power Queen provides a 2-year warranty for the 12V DC-DC battery charger. We're struggling to provide the safest product and the most professional service to every customer. If you have any questions, we'll offer one-on-one technical support to analyze consumers' problems within 24 hours.

ATTENTION: ONLY 5 left in stock.
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12V 40A DC to DC charger

Compatible composition

AGM, Gel, SLA, CA, and Lithium Batteries

Charging Voltage


Charging Current


Max.AlternatorInput Power


Max.Solar Input Power/Voltage



5.83*1.89*7.44 inch


2.43 lbs

Operating temperature

-10°C- 45°C/-14°F - 113°F

Storage Temperature Range

Red: 20'C to 65C /-4Fto 149F

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Power Queen 12V 40A DC to DC Battery Charger