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  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  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  Matt was on time, friendly, professional, very organised and absolutely knew his stuff. He took the time to show me that he'd tested the connections and how everything hung together.... read more

    Angela Carson Avatar Angela Carson
    January 14, 2019
  • 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  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  Had my motor home electrics fixed waited 2 months for these guys but it was worth the wait Didn’t want anyone one else great job Riley and Mat This business knows... read more

    David Burns Avatar David Burns
    August 11, 2022
  • 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  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  Extreme Auto Caravan and Camping today upgraded our 1997 Island Star pop top to enable us to free camp with 12V power. We now have a 200... read more

    Julie Frost Avatar Julie Frost
    April 23, 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  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  Matt and Riley completed a great job, very neat, clean and exceptional service!!! thank you for your effort lads!

    Scott Schultz Avatar Scott Schultz
    March 26, 2020
  • positive review  Matt installed our 300 watt panels, Victron BMS and Tuit Diesel Heater. Very neat and tidy and great system knowledge and always polite. A great tradesman

    Dale Lawrence Avatar Dale Lawrence
    November 27, 2020

    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 service and he knows his job

    Graeme Oxford Avatar Graeme Oxford
    November 25, 2018
  • 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  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  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  Riley might only look “12” but knows his stuff…great job and good communication from Matt…thanks

    Gene Patreece Curtis Avatar Gene Patreece Curtis
    February 17, 2022

    positive review  We had the Red Arc tow pro elite installed by Matt he provided all the information we needed over the phone, he came out on... read more

    Renata Vaclavik Billing Avatar Renata Vaclavik Billing
    November 10, 2016

    positive review  Matthew and Riley are two very professional tradesmen who honoured their time and fulfilled our requirements exactly how Matthew said it would be done sorting the electrical system on our... read more

    Adrian Hill Avatar Adrian Hill
    August 5, 2021
  • positive review  Job done as required. Excellent work does great job.

    Colin Richardson Avatar Colin Richardson
    September 10, 2019

    positive review  Matt’s knowledge and professionalism is second to none. He talked us through his recommendations for the work we wanted and provided us a quote straight away. Matt and Riley did a... read more

    Heather Nethercot Avatar Heather Nethercot
    July 18, 2021

    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 resolves our diesel heater issues when the seller and fitters would not. Thanks Matt your heater has been reliable and efficient. Highly recommend Extreme

    Glenda Smith Avatar Glenda Smith
    July 17, 2019

    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  Matty and Riley have been exceptional. They are the best in the business and know their stuff. Thanks for pointing out Factory Faults with our van so they can... read more

    Karen N Terry Beeby Avatar Karen N Terry Beeby
    November 19, 2021
  • Matt is so the man when a woman is in distress! The electric brakes in The Gin Gypsy were not happening, all before her maiden rural voyage and he came... read more

    Glenda Clarke Avatar Glenda Clarke
    May 17, 2018

    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  Been following Matt for a while he has the knowledge to give good advice and his workmanship is 2nd to none Looking forward to getting my setup in the Jayco Journey... read more

    James Dunn Avatar James Dunn
    May 12, 2022

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