Lithium battery - will I get a longer usage

[Paperthreads]

We have the residential fridge, the most we boondock is for just overnights while traveling from location to location. Though we would like to do more - or longer stays.

Our problem is the batteries just don't make it through the night. If we park sometime around 8pm, run nothing but fridge, lights, maybe a fan, and a CPAP machine, then by 2am, the Carbon Monoxide detecter is beeping that we have low battery and when we check, the batteries are showing about 11.2 on the monitor. We would then need to kick on our generator.

We are thinking of changing out our batteries from the lead acid to Lithium - in the hopes that we can get through a full night using fridge, lights, fan and CPAP - from at least 7pm through 8am, so we can get through a night without needing the generator.

Eventually, we would like to get some solar panels put in, so going to the lithium in preparation for that eventual add-on makes sense to us.

Thoughts from others though on if we will reap some benefits right away by changing over to 2 -100amp lithium?