Enerdrive DC2DC Battery Charger - 12V 40A

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Enerdrive DC2DC Battery Charger - 12V 40A
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Enerdrive DC2DC Battery Charger - 12V 40A


The Enerdrive 40amp DC2DC Battery Charger with combined Solar Regulator is designed to accept multiple voltage inputs allowing you to charge your batteries through your vehicles alternator or your caravans solar panels.  This means you can take advantage of the vehicles alternator whilst moving and your solar panels while you are stationary.  The Enerdrive ePOWER DC2DC+ Battery Charger is a fully automatic multistage, multi input battery charger with the ability to charge from either an alternator linked to a battery; or via solar power with the in built Maximum Power Point Tracking (MPPT) Solar Controller. With two inputs available, the main/house battery will be charged from either the engine while underway, or via the solar panels when stationary. The process to choose either engine or solar is fully automatic and both functions are controlled from within the unit itself without the need for external relays. Most other DC2DC chargers do not have this capability and a separate solar controller is needed. 

EXPERT TIP: The Enerdrive 60Amp70Amp breakers are common accessories suitable for the Enerdrive EN3DC40+ 40A DC to DC charger. Additionally, the 3 pre-wired & fused charging cables are also a great addition, see manuals & drawings for further information. All the accessories are available in the Accessory List above as optional extras.


DC2DC Battery Charger 40A /12V

  • Multiple charging inputs allow you accept voltage from your engine and solar panels and convert to 1  output to your battery bank.
  • DC M6 screw terminals that will allow for large battery cable connection between all sources
  • Includes a dedicated inbuilt Maximum Power Point (MPPT) solar regulator
  • Ability to charge Lithium, Lead Crystal, GEL, AGM, Wet Cell and the ability to create a full custom profile
  • Accepts 12V or 24V from your vehicle and a maximum solar input of 45V/800W
  • Thermo controlled fan cooling allows 40A output up to 40+°C 
  • Fully programmable LCD display to show which source is charging the battery along with charger status, voltage and amperage
  • Temperature sensor included in charger for more accurate battery charging


Looking for this DC to DC Charger with a full wiring kit including resettable circuit breakers? Click here!

During normal operation the ePOWER DC2DC+ Battery Charger will do a full charge cycle to float stage on the house battery bank with ability to choose either GEL, AGM, Flooded, Custom Programmable or Lithium. Once float stage is reached the charger transitions to a power supply mode to support any on-board DC loads.

Multistage Charging Process

The ePOWER DC2DC+ Battery Charger is a fully automatic, set and forget charger. It is designed to quickly and accurately recharge your deep cycle batteries utilising charger algorithms that help to maximise the life of your specialised deep cycle batteries.

The ePOWER DC2DC+ Battery Charger features multistage smart charging technology that enables the charger to be connected to your battery bank permanently. With the input of multiple sources, you can be assured of charging your batteries whenever underway; or when the sun is shining on your solar array.

As dictated by battery manufacturer’s recommendations, deep cycle batteries require a multistage charge sequence for perfect, fast and accurate charging. The Enerdrive ePOWER DC2DC+ smart charger delivers three primary charge stages.

Stage 1 – Bulk or Boost charge; The battery is charged at full rated output current of the charger until the battery reaches its final charging voltage, known as its absorption voltage. In this step, around 80% of the battery is recovered as fast as possible.

Stage 2 – Absorption Charge; With the charger voltage held steady, the remaining 20% is replaced with the charger allowing the current to taper off as the battery approaches full charge.

Stage 3 – Float; Finally, in the float stage the charger voltage is lowered and held at a constant and safe predetermined level. This prevents the battery from being overcharged, yet allows the charger to supply enough current to make up for the self-discharge losses of the battery, while supporting any additional loads connected to the battery (such as DC lighting and refrigerators). This stage allows for the charger to be used as a DC power supply.


Smart Charging Feature

The ePOWER DC2DC+ Battery Charger will regulate its output based on the loads connected to your battery bank. This function is important to maintain the life of your battery bank as some battery chargers mistake loads for discharge and continue to keep the batteries in the bulk or absorption stage for extended periods of time, which will damage the battery bank. The ePOWER DC2DC+ Battery Charger has two methods of load based regulation to ensure your battery charger transitions to float when it should do so.

Battery Temperature Sensor

Included standard with all ePOWER Battery Chargers.


Maximising your Solar Harvest using the DC2DC+

The Solar Input on the DC2DC+ unit has a maximum rated INPUT current of 30amps. This means it is optimised for using higher voltage ‘grid’ type modules for best output performance. The maximum achievable output using standard 20Voc solar modules will be approx 35amps @ 14.4Vdc.

Note: swipe left or right to see the complete data

Panel Array Rated Wattage & Volts Open Circuit Rating Estimated DC Amps Output (## See Below)
1 150watt @ 20Voc 150watts 10
1 200watt @ 43Voc 200watts 13
2 150watt @ 20Voc 300watts 21
2 200watt @ 43Voc 400watts 27
3 150watt @ 20Voc 450watts 31
3 200watt @ 43Voc 600watts 42
4 150watt @ 20Voc 600watts 35*
4 200watt @ 43Voc 800watts 47**
5 150watt @ 20Voc 1000watts Not Recommended
5 200watt @ 43Voc 1000watts Not Recommended

* Maximum achievable output on the DC2DC+ unit when using 20Voc Solar Panels will be the approx 35amps. ** Maximum achievable output on the DC2DC+ unit when using 43Voc Solar Panels will be the approx 47amps.

## IMPORTANT NOTE: Estimated Amps Output is quoted based upon PERFECT Solar conditions including Sun Angle, Panel Mounting angle and Orientation to the sun. It needs to be noted that panel performance alters dramatically between Summer and Winter periods and actual performance may be impossible to predict.



Output Rating

Output Voltage

12V Nominal

Output Current (Maximum)

40A ~ 50A

Output Power


Charger DC Output (CH1):

Selectable Battery Type

Gel, AGM, Flooded, Lithium, Program

Charger Voltage Range

13.8V – 15.5V

Float Voltage Range

13.0V – 13.8V

Charger Current (User Selectable)

5/10/15/20/25/30/35/40/45/50A (default 40A)

Equalize Voltage (Flooded Battery)


Equalize Charging Current

10% of Bulk Current Setting


Charging Control

2 stage / 3 stage selectable

(Default 3 stage)

DC Output Bank


Current draw from CH1 when in use

=<50 mA


Battery Temperature Setting

Low/ Normal/ High

(Battery Temperature Sensor Standard)



INPUT Rating (CH2 - MPPT Solar)

Input Voltage

14.5 - 45VOC


Maximum Solar Input

≤ 23V input, 500W (600W allowable)

≥ 37.5V-45V input, 750W (800W allowable)

INPUT Rating (CH3 - Start/Alternator)

Input Voltage

10.5 - 16VDC / 21 - 32VDC


Height x Width x Depth

242mm x 172mm x 74mm

Unit Weight

1.85 Kg

Shipping Weight

2.17 kg


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In Vehicle & Marine Wiring Diagram

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Towed Vehicle Wiring Diagram

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Pre-Wired Cable Kits Diagram (input only)

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Brand Enerdrive

GTIN 9342616000526

Product Category Battery Chargers

Output Current Rating (Amps) 40

Weight (kg) 1.85

Charger Voltage 12V

Dimensions (D x H x W) 74mm x 242mm x 172mm

NOTE: see full product specifications & further product info in the section on this page.


Write a product review

Best Product

16 May 2024

Absolutely recommended this product, it was so good to have everything stay charging while off grid. We had so much trouble with a previous DCDC charger, so glad we upgraded. It was a great price too. Ready for our Cape York trip.


22 February 2024

Great product dose what it is made for

Excellent retailer

7 January 2024

Great product at fair price Excellent delivery

Enerdrive DC2DC / MPPT Battery Charger

30 December 2023

Excellent price, Prompt delivery, Easy install and operation. Would definitely recommend.

View All Reviews


Warranty Period: 5 Years

Warranty Details: Please CLICK HERE for Warranty Information on this product


  • We ship Australia-wide with national road express freight companies such as Star Track, TNT and Toll.
  • Small Items are sent with Australia Post via regular post.
  • Delivery times are generally 3-5 days from day of dispatch for major cities (sometimes quicker). Please allow longer for regional and remote areas.
  • Once your item(s) have been dispatched, we will provide you freight tracking information so you can track your delivery to your door.
  • Items are fully insured during the freight process.
  • Unfortunately we cannot deliver to PO Boxes.
  • For further details on our Delivery Process you can visit our Delivery Page HERE.
Enerdrive DC2DC Battery Charger - 12V 40A

Enerdrive DC2DC Battery Charger - 12V 40A

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