Battery issues (2019 Freightliner)....

About a month ago, I needed to get a jump start after having the truck parked for a few days while I was home... later that day, we found 2 batteries bad and replaced them....

YESTERDAY, after being home for a few days with the truck parked and everything OFF(at the master switch), I needed another jump start. We later had the batteries tested and found 3(including the 2 replaced last month) bad and replaced all 4 this time..

I was told 2 different potential causes. I am more inclined to believe that the 2 remaining batteries forced the others to go bad.

The other story was to try to blame the 1000w inverter that's been installed for 3 years! I doubt that because we would have had more battery problems than in the most recent 30 or so days.

Which is the most likely issue?

On a similar topic, how powerful does a portable jump starter need to be to work on a similar truck?

 

I had no problem jumping from a reefer engine the one time I needed to, but it's been 3+ years since I pulled reefer......

 

I understand that, and will tell the story of how I came to need that jump start from the reefer, since it was not really a battery problem; it happened when I was having a fuel problem and ran the cranking juice too low..... it is a funny story and admit that had I not been the one in the truck at the time with the problem, I would have been LMFAO....

The truck I had was developing a fuel problem and the gauge was dropping like a rock and shut down....

Turned out that the left tank was dry and the right was overflowing when it was properly diagnosed, but not before being put OOS.

First shop thought it was the crossover valve and fixed that. Turns out that was either the wrong problem, or just part of it, because it continued. 2nd shop recommended a fuel tank replacement, although they couldn't point out the hole it was leaking from (it was overflowing at the fill point, duh)..... we pushed on through delivery and found another shop that actually drained the tank that was overflowing and found a blockage in the line.

I don't care how thorough you think your pre trip or a DOT inspection is.... this would NEVER be found!

What was pulled out...... wait for it..... looked like a CONDOM!

Apparently, someone who was assigned the truck before I was (I only drove it for about a week I think)..... really PISSED SOMEONE OFF!