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 Voltage: 12V Nominal (8.0V min)
  • Output Current (Maximum): 40A ~ 50A
  • Output Power: 775W
  • 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): 15.5V
  • Equalize Charging Current: 10% of Bulk Current Setting
  • Charging Control: 2 stage / 3 stage selectable (Default 3 stage)
  • DC Output Bank: Single
  • Current draw from CH1 when not in use: < 50mA
  • Battery Temperature Setting: Low/ Normal/ High (Battery Temperature Sensor Standard)
  • Efficiency: 95%
  • INPUT Rating: (CH2 – MPPT Solar)
  • Input Voltage: 14.5 – 45VOC
  • Maximum 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
  • Dimensions (H x W x D): 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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Pre-Wired Cable Kits Diagram (input only)

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Brand Enerdrive

GTIN 9342616000526

Product Category Battery Chargers

Voltage 12V

Output Current Rating (Amps): 40 A

Weight: 1.85 Kg

Dimensions: 242 x 172 x 74mm (L x W x H)

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

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.

Important Covid-19 Comment: during these difficult times, our dispatch and delivery times are longer than normal. Please allow additional days for delivery over and above the normal estimates outlined above.

Write a product review

Enerdrive battery charger

By: on 13 August 2022

Hi. I bought this as a "spare" when my original seemed to be playing up, and ended up installing in a much better position than the original (so one can actually see the screen without using a mirror!). Very easy, no problems!

Great product cheap price

By: on 13 August 2022

Great product happy buying from then returning customer

Enerdrive charger

By: on 2 August 2022

Works a treat have not had any battery problems since it was installed

Fast delivery item as expected

By: on 20 July 2022

Very competitive on price and Very fast delivery and item arrived as expected. Haven't had the chance yet to have my dc2dc charger wired up yet but I have faith in the quality of enerdrive and the customer service of CaravanRVcamping.


By: on 5 July 2022

This is an excellent piece of our enerdrive system i have been building. Highly recommended

DC DC charger

By: on 16 June 2022

Great product,good service,Fast delivery.

DC DC charger

By: on 16 June 2022

Great product,good service,Fast delivery.

DC to DC charger

By: on 4 June 2022

Price as the best I could find by a fair bit and the delivery time was very good ,happy to give 5 stars Thanks

Good Delivery

By: on 13 May 2022

The thing I liked the most Is the item arrived by post If I'm not there to receive it They know where to leave it I find that conveniance the utmost.

DC2DC unit

By: on 4 May 2022

Good delivery time easy to install and works well


By: on 28 April 2022

Its a great unit to have in our van,user friendly easy to install wire up and set

DC2DC charger

By: on 7 April 2022

Good charger, did not install yet but Lithium batteries capability and mainly "user setting" is very important if you want "gently charging/discharging" your batteries to achieved much longer life of lithium batteries. Remote display/control panel should be available for lower price. I recommend to everyone.

Enerdrive dc2dc

By: on 25 March 2022

I bought this and found the delivery was prompt and the unit came in perfect order as described I’d recommend buying from caravan camping and this charger.


By: on 9 March 2022

Great product, easy install. Prefect if you've got extra solar panels incase of a shady day and you get full sun for a small period with 800w solar input!

Enerdrive 40+

By: on 22 February 2022

Great communication and prompt delivery ⭐️⭐️⭐️⭐️⭐️

Enerdrive dc2dc

By: on 18 February 2022

Great product

Enerdrive dc2dc

By: on 17 February 2022

Great product

Enerdrive DC2DC battery charger - 12v 40A

By: on 13 December 2021

This product is very easily hidden away given its size. Connecting was made simple and can be hooked up with little knowledge of electrical.

enerdrive dc-dc charger

By: on 17 October 2021

this is the best dc-dc charger, i have used a number from different manufacturers. This unit is so good that i purchased a second one for my off road vehicle.

Enerdrive dc2dc

By: on 6 October 2021

Awesome product. Second battery has not gone anywhere near going flat. Great performance from my roof mounted solar panel

Best DC2DC Charger on the market

By: on 30 September 2021

Fitted these to my VW Transporter house battery. Works so well charges my battery very fast when engine is running. Highly recommended.


By: on 24 July 2021

Recommended by my Auto Electrician

Enerdrive DC-DC 40A Charger

By: on 21 June 2021

I researched quite a lot before deciding on this charger. Very happy with the result - both for price and product. A remote monitor would be nice to have though.

Great Product

By: on 15 March 2021

I had just spent substantially more on a redarc unit to find it was unable to handle the out put of my panels. I went to the cheaper Enerdrive and found the unit more pleasant to install and capable of running my panels. It's been working perfectly for a month or two now. I'm looking forward to the release of the remote display so I can monitor it more easily.

Enerdrive dcdc40 amp charger

By: on 28 February 2021

Prompt delivery. Simple installation. Used this weekend and it performed as advertised. One happy camper.


By: on 11 February 2021

Great product promt service so far its worked darwin to broome without a hitch.


By: on 11 January 2021

Price and Service was excellent. product installed and performing just as intended.


By: on 4 January 2021

Easy to use, easy to install. Does everything I wanted in 1 simple unit.

Impressive charger

By: on 2 August 2020

Setup as a charger in my van. Not to bulky and provides great peace of mind with solar input as well. Definatley the best out there offering upto 50a max charge. A must for any van battery management system.

Works well

By: on 11 January 2020

Had the Enerdrive installed for close to a month now and can’t fault it as far as reliability goes. Maintains charge with just short drives around town and I haven’t seen voltage drop below 11.9v. The digital display is also a very useful feature allowing you to see multiple inputs of voltage and amps without installing seperate gauges.