Cab (Truck) and Cabin (RV) Outdoor Batteries - AGM or Lithium? Best Brand and Price Out There?

[Channelmarker]

I have 1998 Mercedes Benz Actros 2040 truck with 4 large truck size AGM batteries stored in the outside battery back behind the cab and underneath the cabin. The truck side of the batteries hold a charge. But the Cabin side are shot. So now I have to decide whether to continue going with AGM batteries, which are cheaper and can handle colder weather better, or lithium batteries which are much easier to maintain, hold a deeper charge, but don't hold up to cold as well.

So, should I go with some new AGM batteries which are cheaper and can handle colder weather? And if so, which brand, how big and powerful, and what is the best deal out there?
Or, should I go with new lithium batteries which hold more charge and are less finicky, but don't handle the weather as well? And if so, which brand, how big and powerful, and what is the best deal out there?

 

[Trail Talk]

2X amps @ 1/2 weight =

 

[DiploStrat]

To be clear, lithium iron batteries have no problem discharging at below freezing; they cannot be charged when below freezing.

Depending on how cold your battery area actually gets, you are probably fine with heated batteries, as sold by Battle Born and others.

 

[chet6.7]

This guy reviews a lot of batteries, has a forum as well.
https://www.youtube.com/@WillProwse/videos

 

[Channelmarker]

Thanks for everyone's responses. Very helpful.

However, right now I have a complete AGM Victron system that has not been updated to include Lithium batteries. I have some great lithiums from my old rig that I eventually want to install and I have a place to install them inside. But that is for a future project when I update the whole electrical system to include a 110 inverter (it currently has a 230 European system only) and I add in my 110 Honda 30000I generator).

It sounds to me that the best solution for now is to get two new AGM batteries for the cabin side only until I get the money up for the electrical overall that I want to do on the rig which may take a year or two.

Where is the best and cheapest but good quality place to buy big truck AGM batteries?

 

[Channelmarker]

You could have saved time by not asking about Lithium if you'd already made up your mind.

I didn't make up my mind until I read everyone's posts. Isn't that the purpose of the forum - to gather people's opinions and then make a decision and then see if it holds up to scrutiny, but not unnecessary sarcasm?

 

[chet6.7]

When I bought the batteries for the Cummins I found that group of batteries at O'Reilly Auto Parts was made by East Penn. Who knows now, I try and avoid Johnson Controls.

 

[Peter_n_Margaret]

I have a complete AGM Victron system that has not been updated to include Lithium batteries

What components can't be reprogrammed to suit Lithium or are not already suitable as they are?
I changed from AGM to LiFePO4 a while back and bought ZERO new bits. I continued to use my 20 year old solar controller. Just because it has not got "Lithium" written on it does not mean it is not 100% suitable.
Cheers,
Peter
OKA196 motorhome