Announcement

Collapse
No announcement yet.

Battery Voltage protection confusion !

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
  • #1

    Battery Voltage protection confusion !

    HI all
    im confused with all the reading i do a 12v battery 11.8v is 0v (dead) and 12v is 80% discharged and you dont really want to discharge past 40-50% so 12.2v so how does this item do anything ? where is the protection ?

    https://www.ebay.com.au/itm/PROJECTA...72.m2749.l2649
    SPECIFICATIONS
    DISCONNECT VOLTAGE 11.6V
    RECONNECT VOLTAGE 12.5V

    Thanks in advance
    Tags: None
  • #2
    Generally accepted you shouldn't discharge below 50% but that is also an urban legend. Generally when determining
    voltage using SOC it is assumed only a very small load is applied, I'm assuming with the device above the cut out
    voltage has been based on a larger load being applied and the size of the cabling etc has been factored in.
    Personally I would be testing with the device you intend to connect to it and see what the actual battery voltage is when
    it cuts out.

    If you intending to use with the cranker then make sure the cranker is healthy.
    LeighW
    LeighW
    Avid PP Poster!
    Find all posts
    View Profile
    Last edited by LeighW; 06-01-2019, 10:11 AM.
    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

    • #3
      Originally posted by LeighW View Post
      Generally accepted you shouldn't discharge below 50% but that is also an urban legend. Generally when degerming
      voltage using SOC it is assumed only a very small load is applied, IO assume with the device above the cut out
      voltage has been based on a larger load being applied and the size of the cabling etc has been factored in.
      Personally I would be testing with the device you intend to connect to it and see what the actual battery voltage is when
      it cuts out.

      If you intending to use with the cranker then make sure the cranker is healthy.
      Gottcha makes a bit more sense.

      i have a supercharge 105a/hr all-rounder as my aux battery(ironman 40a dc-dc charger chargers it) that runs a 40l engel just wanted to add a layer of protection in there. i will test it like you said. what would a safe cut out voltage be.

      Comment

      • #4
        Personally I would go with something like this:
        https://www.jaycar.com.au
        Use decent cabling them you don't have to factor in cabling losses, I would set it to around 12V which is around 50% SOC initially and then trim to your requirements.
        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

        • #5
          https://www.ebay.com.au/itm/KICKASS-...U!-1:rk:3:pf:0

          https://www.ebay.com.au/itm/12V-60A-...zFz3:rk:5:pf:0

          https://www.ebay.com.au/itm/Projecta...OJTA:rk:9:pf:0

          There's a higher capacity version of the projecta unit for a few $ more.
          2019 GXL, Bullbar, UHF, Redarc Brake Controller, Tow Bar, Secondary Fuel Filter

          Comment

          Previous template Next
          Working...
          X