Announcement

Collapse
No announcement yet.

Fuse Amperage for Dual Battery VSR/Isolator

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Fuse Amperage for Dual Battery VSR/Isolator

    Hi,


    I can't find much consistant information about what Amp fuse/breaker to use when installing a Dual Battery Isolator/VSR in my 120. It is a 2005 petrol model.

    It is a Kings isolator but seems to be from the same factory as all the other isolator kits. Kings reccomend a 50 A fuse for the 120, but KickAss supply a generic wiring kit with an 80A fuse. I have seen some installs on line with as high as 120A fuses.

    Can anyone with an isolator install please let me know what Amp fuse/Breaker you are using or reccomend?


    Thanks very much.

  • #2
    I also have a 4.0L 2005 120 series. My dual battery system uses a VSR also which was Kickass branded (same as yours but stickered differently), but with 4B&S cabling throughout instead of the typical 6B&S. Mine uses a 120A circuit breaker. Installation was done by auto electricians 2 years ago. I supplied the 100ah lead acid deep cycle battery & fitted the battery tray & did the power steering fluid reservoir relocation myself from midnight to 2am over two nights at the time due to having a new born baby at home. I also had 3 @ 12v power outlets fitted. All up cost me $700 & something. Should’ve seen how relieved the auto electrician was when I dropped my car off to him & told him I already fitted the battery tray. He was happy as he had a full on day booked with his workload that day.

    The fuse size depends on your maximum draw from the battery. For eg if you’ll only ever be running a fridge in the boot and charging an LED camping torch & a phone or two, then the 50A fuse will be just fine. I never told my auto electrician what I’d be running from mine & given I requested 4B&S, he must’ve assumed some decent power draws were possible. The VSR itself can handle up to 140A max being pulled through it by whatever you’re running in the boot at once from your deep cycle battery. Your likelihood of pulling over 40amps at once in the boot from a few after market 12v outlets back there is highly unlikely. A standard run of the mill air compressor draws around 15amps, but are generally connected to the cranking battery. A 300w inverter will draw around 30amps and if ever connected to the deep cycle at any stage while a fridge is also running off it, does change things. In that case a 60-80A fuse would allow a bit more power draw before it tripped.
    Brett1979
    Avid PP Poster!
    Last edited by Brett1979; 10-04-2022, 11:19 PM.
    2005 120 series V6 Grande, 2 inch susp lift (King/EFS combo), 32 inch MT’s, Safari Snorkel, rear diff lock, breathers, Light Force spotlights, UHF, dual batteries.

    Comment


    • #3
      What size wire does your kit have? Thats the first and most important part.

      The Kings shows a 10mm2 cable size, which is roughly 7AWG. Being that the length they show is 6 mtrs supplied with the kit, I wouldnt be using higher than a 50A fuse.

      Shorter cable length and thicker cable will increase this slightly, But I wouldn't chance too much. Have a look at the chart below and do some sums.

      http://www.enerdrive.com.au/wp-conte...able-Chart.pdf

      Comment


      • #4
        On one of my vehicles I run a Victron DC DC (30 amp DC DC, and have it fused at 40 Amp. ). On another I have a Redarc VSR and have it fused at 100 Amp. But I know the cable capacity on both exceeds fuse rating, and the VSR / DC DC is capable of the current safely.

        Comment


        • #5
          As Piggy wrote, the fuse is to protect the cabling, should it get shorted to ground. If then cable can safely handle 50A then you could use a 50A fuse,
          if 10A cable then a 10A fuse. If the using 50A cable thats directly connected to 10A cable then a 10A fuse. Of course it would be stupid to put
          isolator that is only rated at 50A in the middle of some 100A cable then fuse it at 100A etc.
          HKB Electronics, manufacturer of the Alternator Voltage Booster, Silver 2008 D4D,Lifted,Underbody protection, Alternator Voltage Booster, Tiger Z winch, Lightforce DL, Air Horns, Tanami Drawers, Drop down fridge slide, Outback cargo barriers, Rotronics dual Battery system, Polaris GPS, HF/UHF/VHF, Radio speaker combiner, Long ranger water tank, Diff breathers, Inverter, Snorkel and others

          Comment

          canli bahis siteleri bahis siteleri ecebet.net
          mencisport.com
          antalya escort
          tsyd.org deneme bonusu veren siteler
          deneme bonusu veren siteler
          gaziantep escort
          gaziantep escort
          asyabahis maltcasino olabahis olabahis
          erotik film izle Rus escort gaziantep rus escort
          atasehir escort tuzla escort
          sikis sex hatti
          en iyi casino siteleri
          deneme bonusu veren siteler
          casibom
          deneme bonusu veren siteler
          deneme bonusu veren siteler
          betticket istanbulbahis
          Working...
          X