ABOUT MY 2020 KW990 BATTERIES

Discussion in 'Ask An Owner Operator' started by Coma1, Nov 24, 2022.

  1. Coma1

    Coma1 Bobtail Member

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    Oct 31, 2019
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    Need help.I have had this 2020 KW 990.comes with apu unit(Thermo king).Whenever i park and turn the engine off, within 2-8mins the apu kick in for charging the battery already.Meanwhile before I turn off the engine .the volts on the battery was 14v.the truck comes with the standard fridge from the manufacturer and I have these cooler I bought from Truckstop as addition to keep my food in from going bad.When the apu kicks in less that 10-15mins it shows 14v but it’s running for 2-4hrs.Right when the apu goes off the battery drops 13v less than 15secs.What is the issue.I don’t smell nothing like a rotten eggs on the battery.I open the battery section to see if there is any leaks or rust .nothing .please any help with suggestions with help.Thank you.
     

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  3. abyliks

    abyliks Road Train Member

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    Clean/tighten connections but batteries are probably junk
     
  4. ducnut

    ducnut Heavy Load Member

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    I’m wondering, if you have a bad battery that’s pulling down your overall voltage level, which is creating the load your APU is sensing?

    With the crappiness of our roads and further crappiness of battery manufacturing, they just don’t last anymore. I’d pull all of them, rotate them through a charger, then, have them all load tested. You’ll quickly find the bad one. If you don’t care to do that, just figure on replacing the whole bank. Never replace just one at a time.

    As a side note, you may research capacitor technology. A buddy recently installed one and says it’s ability to crank is otherworldly. I don’t know enough about them to authoritatively speak about them. But, I think, they’re worth looking at, if for nothing but looking at all options.
     
  5. Midwest Trucker

    Midwest Trucker Road Train Member

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    Sounds like your batteries are crap. If they are original and it’s a 2020 then they for sure are. Unfortunately the oem batteries your lucky to get 2 yrs.
     
  6. fortycalglock

    fortycalglock Road Train Member

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    Tourist Town, FL
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    Batteries are 12v, alternators charge at 14v. Of course your voltage isn’t going to show 14 volts with the truck or apu off.
     
  7. Vampire

    Vampire Medium Load Member

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    Spend the money and replace the batteries. You'll thank yourself later. Especially when you hear of, or see someone broke down on the side of the road because they took a chance with their battery that gave them the warning sign of a hard start but they felt it could go just a little longer. Look at them now, broke down and costing them down time and more money.
     
  8. Coma1

    Coma1 Bobtail Member

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    Thanks for you help
     
  9. Coma1

    Coma1 Bobtail Member

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    Oct 31, 2019
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    Thanks
     
  10. Coma1

    Coma1 Bobtail Member

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    Oct 31, 2019
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    Thanks for your help
     
  11. Coma1

    Coma1 Bobtail Member

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    Oct 31, 2019
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    Thanks for your help
     
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