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  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  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  Mat and Riley installed a diesel heater in our caravan and did an excellent job. Thanks once again Mat

    Deb McGinlay Avatar Deb McGinlay
    October 18, 2021
  • positive review  We recently had a dish installed and Matt's service was outstanding , we couldn't be happier with the product and the installation . i would highly recommend Matt

    Haydn Fowler Avatar Haydn Fowler
    November 18, 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  Hi I would highly recommend extreme auto caravan and camping I have used them twice and both times were prompt and professional in all they did Matthew and Riley were... read more

    Graham Odgers Avatar Graham Odgers
    September 8, 2021
  • positive review  Matt and now Charles have worked on my last 4 cars and 1 vav. nerver have these guys let me down or given me poor advice. you boys rock

    Daniel Colson Avatar Daniel Colson
    May 24, 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  Matt came around today to install my UHF radio. Dual battery setup and my 24 volt fyrlyt spotties. Could not fault his punctuality, knowledge, service or cleanliness and pride in... read more

    Benjamin Smith Avatar Benjamin Smith
    April 20, 2017
  • positive review  Matt is a true professional, treats every job like his own. would not hesitate to recommend Extreme to anyone looking for work done

    Ian Smith Avatar Ian Smith
    August 1, 2019

    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

    positive review  Matthew took the time to ring me after my initial email enquiry, talked me through my options, did a quote outlining costs and while I had a lengthy wait due... read more

    Kristin Hodge Avatar Kristin Hodge
    March 23, 2022
  • positive review  Matt is a legend in what he does.He installed our Deisel heater a couple of weeks ago in our Nova Terra Sportz and very happy with his service. very professional... read more

    Darren Smith Avatar Darren Smith
    August 28, 2020

    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  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  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  Matt was excellent to deal, turned up on time with more than enough solar panels and gear to handle any issues. Installed an excellent system that works well, sorted out... read more

    Drew MacKenzie Avatar Drew MacKenzie
    February 25, 2022

    positive review  Great job on our Pajero! Workmanship is of the highest standard. Great service and a fantastic job. Thanks Matt. �

    Jackie Daniel Avatar Jackie Daniel
    November 25, 2016
  • positive review  Reviewing from a different perspective... As a supplier to Extreme, what made my decision to supply to Matt was the consistent attention to detail and quality of work. I spent... read more

    Paul Freeman Avatar Paul Freeman
    December 6, 2021

    positive review  First time I have used Matt, absolutely wrapped with the work he has done for me on installing solar panels, lithium batteries and would absolutely recommend him to anyone.

    Neville Hembury Avatar Neville Hembury
    December 1, 2020

    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  Matt's knowledge and experience of all 12 volt systems for vehicles and caravans is second to none! His workmanship, attention to detail, care of your property is exemplary. Can't recommend... read more

    Mark Gibbons Avatar Mark Gibbons
    August 18, 2021

    positive review  Can't rate you highly enough Matt was excellent went above and beyond Communcation has been excellent all the way Great service keep up the fantastic work

    Andrea Conway Avatar Andrea Conway
    December 2, 2021

    positive review  We have been using Extreme Auto for a number of years both with our old van and our current new van. Matt and Riley are fantastic to deal with, work... read more

    Dave Chris. Jarrett Avatar Dave Chris. Jarrett
    November 2, 2021
  • positive review  The guys did a brilliant job. Super helpful through the design stages with a thorough knowledge of the different options to suit our needs. The install was timely and one... read more

    Peter Bain Avatar Peter Bain
    August 23, 2022

    positive review  Matt did a great job upgrading our solar on our van and was very helpful with advice on future things we may look at

    Alan Jones Avatar Alan Jones
    January 5, 2022

    positive review  Matthew was very accommodating with anything we ask for. He is very professional and did a very clean job not leaving any mess. We would also like to thank... read more

    Lee Inns Avatar Lee Inns
    August 3, 2022
  • 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  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  Best service and workmanship around.

    Andrew Delsar Avatar Andrew Delsar
    June 29, 2015

To learn more about us & our products please visit our YouTube Channel