My house and chassis batteries are not keeping enough charge overnight

[JoePickleball]

Thank you VERY much for everyone's responses. I will have the batteries tested at an Auto Zone. Good idea. Didn't know that was possible there. I am NOT opposed to Lithium batteries, just thought that they were much heavier than AGMs. And, evidently, according to an RV service center I spoke with 3 months ago, Lithium is undergoing some major reboots due to a lot of folks complaining about their Lithium systems on the B van configurations. What's up with th

What work do you need the shop for? If your van is configured to be Li compatible, it should be a pretty simple "plug-n-play" swap. Just make sure you follow the existing wiring at the batteries since you already have 2x12V batts.

Again, if it's truly "Li compatible/ready", it should have an appropriate "apparatus" for charging Li from the alternator (either a DC2DC charger, or a Li BIM). If not, those are relatively simple to add, but they can get kind of spendy IMO. Bottom line here is you may want to protect the chassis alternator.

Then you just need to make sure if your converter is not automatic, that you have it set for Lithium charging profile (look up the model and read the instructions). Same with the solar charge controller.

Certainly no judgement from me if you're uncomfortable and want a pro to handle it. Personally, I wouldn't pay a shop to swap batteries, but I (more or less) know what I'm doing and am relatively comfortable working on low-voltage systems.

Thank you, Camper Bob. Your outline is reassuring. I don't have a lift to get to the two 12 volt batteries under the van. They appear to be bolted down into dish frames. I'm not comfortable doing the swap myself after reading the importance of proper electrical configuration, shunts, BMS, solar compatibility, and so forth. All of this is WAY OUT of my comfort zone. I have a scheduled call with a Battle Born tech representative this Wednesday to discuss my rig and options for the lithium setup. I have emailed a service installer they endorse in central PA. Hopefully, I can get this done this year! Joe