New batteries, still not enough juice to run fridge over night?

Check out getting a compasitor batter for your truck run you about 1k, check out maxwell.com a buddy has one and he loves it, even I'm thinking of getting one installed when I can get the money together.

 

I too am having issues with the voltage draining pretty quick... I have a fridge installed and an TriPac APU. I am definitely going to get me a Start Module and was going to install 3 AGM batteries as well. Who did you buy yours through? I found batteriesplus sells them but they are 350.00 At night I am usually running my laptop, till I go to sleep, and air. If it is hot enough, AC and if it is cold enough, heat. The APU kicks on about 20 minutes after it shuts off, which I feel is a little soon. The APU runs for 30/45 mins before it shuts off again. These crap batteries are not that old and I did have them checked recently when my ALT went out. They told me that one had a bad cell. Lately I have been having a problem with my APU. It used to kick on before an audible sounds for low voltage came on but now, it kicks on right after the audible for low voltage. Sometimes it initiates the start but, doesn't start and gives the low voltage code. Most of the time when it does this, I reset and than about 30 seconds goes by and the APU starts. Today I had to actually jump my truck using my reefer because the APU wouldn't start. I realize replacing the lead acid batteries with AGM and installing a Start Module won't fix this problem but, if I ever have a problem with the APU, I won't need a jump to start my truck.

 

The best I found on Battery AGM, was at amazon Exide Road Force AGM 200
i have these in my truck for the last five years, still going strong.

 

had the sort of the same problem. ended up being my battery kill switch. removed it and truck starts fine now.

 

nice! does your truck have a built in fridge? Basically, does it cycle a lot?

 

Built-in fridge, microwave, lab top you name it got all the toys, and an APU. Not once I need to idle the truck when it was -20 out side, Those's battery have some good cranking power to them.

 

I read a lot of bad reviews on Amazon, that is why I was asking...

 

SheepDog: Ft.Chiswell, Va. Flying J, Boss Shop sells the Maxwell Start Module for 1K. (u could check othr Boss Shops)