The REDARC BCDC1240D 40A Vehicle DC Battery Charger from Nomadic Supply Company designed to keep your auxiliary battery charged when driving or with portable solar panels when parked. It uses multi-stage DC-DC charging, a system that allows optimum charging levels for your auxiliary battery. REDARC BCDC1240D Dual Input 40A Vehicle DC Battery Charger is solar ready and suitable for many battery types including lithium, AGM, GEL, standard lead acid and calcium.
Dual Battery Charger with solar input
The REDARC BCDC1240D Dual Input 40A Vehicle DC Battery Charger works from a wide operating range (9-32V) and provides the option of charging from both 12V and 24V vehicle systems. Additional features include a Maximum Power Point Tracking (MPPT) solar regulator, which allows the maximum amount of power to be delivered from your solar panels to your auxiliary battery.
Multi-stage charging profile
REDARC BCDC1240D 40A Vehicle DC Battery Charger also acts a dual battery isolator. If the voltage gets too low, the start battery is protected. It’s fan free creating a quiet operation, is fully sealed, and has multiple levels of fault protection. The SEMA Global Media Awarding winning BCDC1240D is perfect for charging AGM, Gel, Standard Lead Acid, Calcium, and LiFePO4 batteries. The in-vehicle dual battery range keeps your auxiliary battery banks charged to their optimal levels and lets you continue your adventure uninterrupted.
What does Solar Ready mean?
Solar ready is the ability to convert solar energy into storable, useable power.More specifically, products that are solar ready are equipped with internal solar regulation, allowing them to be utilized in-conjunction with unregulated solar power in order to supply a regulated charge for the purposes of charging an auxiliary battery. This process enables the secondary battery in a dual battery setup to receive charge to be utilized for powering on-board devices and 12v accessories without the need to connect to mains power or run the vehicle. Solar ready is available as standard in REDARC’s dual input DC to DC in-vehicle battery charger range. This includes the 25AMP REDARC BCDC1225D and 40AMP BCDC1240D dual battery chargers, compatible with both 12 volt and 24 volt vehicle systems.
What Is Green Power Priority?
Green Power Priority is used to describe the priority given to a solar input when charging an auxiliary battery in your vehicle. For example, if a solar power input is available the maximum available solar power will be used before topping up the output charge current from another power source. Priority is given to the solar input then to AC Mains power (where applicable), then to DC Vehicle Power, the advantage of this is that it places less load on the alternator.
Which of our products use Green Power Priority?
A number of our products use Green Power Priority including In-Vehicle Dual Battery Chargers:
REDARC BCDC1225D Dual Input 25A Vehicle DC Battery Charger
REDARC BCDC1240D 40A Vehicle DC Battery Charger
REDARC BCDC1250D Dual Input 50A Vehicle DC Battery Charger
Best DIY DC battery charger
For self installation, we recommend also purchasing the REDARC FK40 40A Fuse Kit.
Built tough for all conditions
REDARC BCDC1240D Dual Input 40A Vehicle DC Battery Charger with solar input has been proven to work in all types of terrains, including deep water crossings, and stands up against extreme heat (up to 176°F). It’s fully sealed against the risk of infiltration from water and dust and will hold up to the adventure at hand. It’s designed to maximize the performance and life of your auxiliary battery and is suited for battery bank sizes of 200AH and above in most applications.
Made in Australia by REDARC this amazing range has undergone years of testing in some of the harshest conditions on the planet. REDARC has been in business for nearly 40 years and all of our products are made tough enough to take anything nature can throw at them.
*Suitable for use on vehicles with conventional alternator charging systems.
Need help?
For help in choosing the best dual battery setup for your needs use the free REDARC dual battery selector.
REDARC BCDC1240D Dual Input 40A Vehicle DC Battery Charger Tips
Dual Input 25A In-vehicle DC Battery Charger Product Brochure
How to determine if you have a variable voltage (smart) alternator
How to access an ignition source (for the blue wire) when your BCDC is installed in a trailer.
REDARC BCDC1240D 40A Vehicle DC Battery Charger Specifications
Input Voltage 9 – 32VDC
Output Voltage 12V
Maximum Charging Voltage 15.3V
Output Current Rating (Cont.) 40A
Output Power 600W
Input Fuse Rating 60A
Output Fuse Rating 60A
Length (in) 6.50
Width (in) 4.72
Height (in) 1.46
Weight (lb) 2.3
Standby Current Draw <8mA
Warranty 2 Years
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to