Ever wanted to be able to power appliances like fridges or induction cookers in your 4wd, caravan or RV? The system should isolate and protect the starting battery from the power drain. The power should be drawn from a completely separate battery to that of the starter battery. The system should be capable of bringing the secondary battery to aid vehicle starting (if applicable). The alternator should charge the starter battery first and then divert power to the secondary battery automatically. Dc-to-Dc charging is a desired option as its ability to fully charge a secondary battery is achieved. Cable sizes play a massive role in the system especially over great distances through Anderson connections. Having the incorrect size cable can rob your system of charge. Correct monitoring of the system is just as important as the system itself.

Why Choose Us

  • 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  I used extreme auto for the first time today to get my dual battery system sorted. I can't praise Matt enough for his punctuality, knowledge, friendliness and workmanship..... oh and... read more

    Fab Jenn Avatar Fab Jenn
    February 9, 2017
  • positive review  Did an awesome job on my hilux! Heaps of work done to a top standard!

    Ryan Weckert Avatar Ryan Weckert
    June 29, 2015

    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  thank you riley,for upgrading our battery system,also thank you matt for excellent advice,you where on site when you said you would be and to us that is excellent customer service,a... read more

    Dave Mcpherson Avatar Dave Mcpherson
    June 7, 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 recently installed my diesel heater. His business model is spot on. He books you in, confirms the day before he comes, sends you an sms when he... read more

    Marcus Hooper Avatar Marcus Hooper
    May 12, 2019

    positive review  Matt has installed a Solar battery system on our van, dual battery systems on two Utes, as well as UHF Radios, Light Bars and Spotties. This has all been done... read more

    Baz Bec Sims Avatar Baz Bec Sims
    February 29, 2020
  • 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  Recently Matt and Riely installed a Monster Of grid solar system into our new Avida Esperance motorhome. After many queations asked by Matt on the requirements that we were expectng in... read more

    Domenic Centofanti Avatar Domenic Centofanti
    April 11, 2022

    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  I called matt for some advice prior to purchasing today and I must admit his technical level of knowledge (I am a professional in a very similar industry), enthusiasm and... read more

    Cy Cox Avatar Cy Cox
    April 7, 2017

    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  Had Matt install reversing sensors and LED indicator on my Sorento SUV and must say I am very impressed with both his workmanship, professionalism and good old customer service. His... read more

    Nicholas Ng Avatar Nicholas Ng
    December 14, 2015
  • positive review  I have used Matthew for the first time today. I had an AES fridge problem. What a great operator. Knows his stuff, very reasonable price and nice guy to go... read more

    Kerry McCloud Avatar Kerry McCloud
    November 27, 2019

    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  Extremely happy to HIGHLY recommend this business.Did a heap of lithium battery related work on my car and caravan for a VERY REASONABLE price.***** 12/10 A BIG thank you to... read more

    John Wertiko Avatar John Wertiko
    February 22, 2022
  • positive review  Matt did a great job very professional, great communication and polite, I will highly recommend him

    Keith Fleming Avatar Keith Fleming
    March 11, 2019

    positive review  Great professional service , solved a problem in 5 minutes that had us stressed for a couple of months, all because the manufacturer didn’t put the correct size fuse... read more

    Janice Key Avatar Janice Key
    November 19, 2021

    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  Hey just want to say thanks heaps mate for the the work you done on my car I could not be happier. I am one happy customer and would recommend... read more

    Nick Clifton Avatar Nick Clifton
    June 26, 2014

    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  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  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  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  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  I thought from the reviews that these guys knew their stuff,, and I was not disappointed. Excellent knowledge of all things 12 volt, Victron, automotive, the list goes on exactly... read more

    Evan Higgins Avatar Evan Higgins
    May 18, 2021

    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  There are good reasons that these guys are flat out and booked months in advance. Courteous, punctual, knowledgeable and informative, but most of all, their work is of the highest... read more

    Hilton Gumbys Avatar Hilton Gumbys
    August 17, 2022

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