Having a correctly installed Dc-to-Dc charging system in either your caravan or vehicle will guarantee the charging system is kept under a managed limit.

As lithium becomes more and more popular among the 4wd and caravan industry, people are realising the added benefits of light weight, more energy dense lithium battery systems. Keeping these cells and BMS happy with regulated charge will ensure the life expectancy is achieved. No BMS disconnects and 100% state of charge is reached. A key feature to note here is alternator loading. Most modern factory fitted alternators produce their best power at 1500-2000 rpm. This is cruising RPM for most vehicles. The cooling of the alternator is done by an internal fan so as it heats up under load (i.e., a big lithium battery running from it with no regulator/ Dc charger) the stress can derate the output and failure is imminent. I have seen this on many occasions and now even more so with the onset of lithium. Running a controlled charge rate based on both your alternators output and the systems battery bank will keep things running cool, efficient and you won’t have a failed alternator or flat starter battery.

Bigger is not always better here.

An example here would be two Dc-to-Dc chargers running from a factory alternator. If one is a 25amp Dc charger and the other a 50amp Dc charger the actual load input before the Dc charger is higher. Roughly 30 amps for the 25amp Dc charger and up to 60 amps on the 50amp Dc charger. That’s 90 amps right there under bulk charge conditions. And, the bigger the battery bank the longer it will take to charge so you need to design the system accordingly. 

We specialise in the field of Dc-to-Dc charging and guarantee you get the charge rates from the system we design.

Why Choose Us

  • positive review  Matt has done work for me on both my car and van, and he’s quality of work and knowledge is exceptional. He takes the time to explain what he’s going... read more

    Wayne Donnelly Avatar Wayne Donnelly
    March 25, 2019

    positive review  Awesome job done by Matt again! You always do an exceptional job & help us after with the final details! Have been using you now for several years on different... read more

    Katrina Miller Avatar Katrina Miller
    February 13, 2022

    positive review  Thanks Matt, very happy with the job you did with the added extra Solar and new batteries, very professional and as added bonus, the Drifter Panel works a treat! 😊 Would... read more

    Leanne Shanks Avatar Leanne Shanks
    May 28, 2019
  • positive review  We didn’t mind driving up from Melbourne and waiting for over 3 months for a booking to get some of Matt’s 12volt expertise in upgrading our lithium power... read more

    Preeti Singh Avatar Preeti Singh
    July 14, 2021

    positive review  Not only was Matt very efficient - professional and extremely knowledgeable about the work he does, he is also 'old school' when it comes to manners - respect and friendliness.... read more

    Marcia Veale Avatar Marcia Veale
    August 17, 2018

    positive review  Matt and Riley just set up our van to 12 volt, set the tow rig up with dual batteries and installed spot lights. We are so happy with their work,... read more

    Ingrid Elzinga Avatar Ingrid Elzinga
    October 1, 2021
  • positive review  Extreme Auto did a superb job installing a diesel heater on my houseboat. It was a complex task but done extremely knowledgeably and professionally, very neat and clean.

    Barbara Venn Avatar Barbara Venn
    August 10, 2021

    positive review  I thoroughly recommend Matt and his team from Extreme Auto Caravan and Camping, for any work on your 12v system in van or motorhome. He has always done... read more

    Albert Kramer Avatar Albert Kramer
    July 2, 2021

    positive review  Thoroughly recommend Matt and his team for their customer service. Nothing is too much trouble, even providing a replacement cap for a diesel tank installed a couple of years ago.... read more

    Terri Bateup Avatar Terri Bateup
    June 16, 2021
  • positive review  We travelled 1400km for our massive off grid upgrade on our caravan. We are extremely happy that we can run all of our appliances with ease. A totally thorough, and... read more

    Fred Kirchen Avatar Fred Kirchen
    January 21, 2022

    positive review  Matt does an amazing job and thinks about what you need for the type of travel you do. Very professional with attention to detail. Cannot recommend him enough! Had him... read more

    Peta Matthews Avatar Peta Matthews
    May 26, 2021

    positive review  Matt provided excellent service in a friendly, helpful manner. His attention to detail is extraordinary and his knowledge and product is exactly what needing

    Sue Harris Avatar Sue Harris
    October 27, 2021
  • positive review  Recently had an upgrade to our caravans off grid electrical system, Matt and Riley work was very professional leaving no stone unturned, I strongly recommend them for a quality, knowledgeable... read more

    Glenn Scott Avatar Glenn Scott
    September 13, 2021

    positive review  I had Charles come out last Thursday to wire up second battery with a dc dc charger. What a great job he did. Plus a great guy also. I have... read more

    David Griffin Avatar David Griffin
    June 24, 2019

    positive review  Met Matt @ Caravan/Camp show 2 yrs back. Professional, knowledgeable & a great work ethic. He turned up when he said he would, did exactly what he said he would... read more

    Rockin Roy Avatar Rockin Roy
    January 28, 2020
  • positive review  We have been using Matt’s services for a while now, when you’re on a good thing, stick to it. Great service from Matt, and now Riley. No job too small... read more

    Alana Odam Avatar Alana Odam
    November 4, 2021

    positive review  Matt did a terrific job adding a Foxtel IQ3 box to the satellite TV system installed in our motorhome.

    Gary Oo Avatar Gary Oo
    August 4, 2021

    positive review  Monday 8 August 22 I had Riley come and fit a reversing camera system to my caravan and screen to my car. He also added two Anderson plugs to my... read more

    Maree Tumbas Avatar Maree Tumbas
    August 10, 2022
  • positive review  Last week Matt installed our WiTi Alarm system and a Masten Reverse Camera to our Jayco Outback Journey Caravan. I can highly recommend him. Matt is very experienced in his... read more

    Irma Kutcher Avatar Irma Kutcher
    March 15, 2021

    positive review  Such a professionally run company. Matt is so good at what he does and is a legend. Arrived on time and went above and beyond to get us all set... read more

    Shonel Shute Avatar Shonel Shute
    April 4, 2019

    positive review  I would highly recommended Matt to anyone his workmanship and knowledge is second to none

    Lance Edwards Avatar Lance Edwards
    October 4, 2018
  • positive review  Thanks Matt for an excellent installation today! Highly recommend this friendly, efficient and hard working man to anyone! Fabulous job!

    Linda Adler Avatar Linda Adler
    February 26, 2015

    positive review  I have used Matt for all my 12v set ups over the last few years. Great guy who gives great service and knowledge of his trade. Thanks Matt for replacing... read more

    Judy Snider Avatar Judy Snider
    November 28, 2020

    positive review  Had a great job done by Mat & Riley fitting my 330ah mercury battery (power paul) also relocating my Victron gauge to a great spot. Top job boys., on... read more

    Faye Gordon Turnbull Avatar Faye Gordon Turnbull
    January 23, 2022
  • positive review  Sometimes you have to wait for the best....we have had a number of electrical problems over many years which cost us both time and money...while caravanning we spend the majority... read more

    Madelyn Bansemer Avatar Madelyn Bansemer
    July 29, 2021

    positive review  Mathew and Riley, excellent prompt service and advice as expected, excellent quality work and always patient with my questions

    Shane Ash Avatar Shane Ash
    August 5, 2021

    positive review  We have used Matt 3 or 4 times. Always found him to be most helpful. He is extremely thorough and his work is neat and precise. We highly recommend... read more

    Helene Scott Avatar Helene Scott
    May 30, 2020
  • positive review  So happy with the service, knowledge and care shown by Matt and Charles. They certainly have their way around everything 12 Volt. The new Solar system they've set up... read more

    Andrew Jackson Avatar Andrew Jackson
    July 10, 2019

    positive review  Matt is the most knowledgeable auto electrician ever met. Fantastic work always with our safety in mind. Designs & connects everything so it’s easiest to operate & optimises use of... read more

    Rose Stewart Avatar Rose Stewart
    June 6, 2021

    positive review  Brilliant. Professional. Clean. Knowledgeable. Friendly. Easy to understand. And loves what he does. Mat will have all my work from now on. Keep it up mate.

    Barney Leigh Avatar Barney Leigh
    July 1, 2018

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