Converting to Lithium in a ‘22 Tag

2022TAGowner

I have a ‘22 Tag and want to convert to a lithium battery. I saw a YouTube video of a guy changing to a 12v 140ah Bluetooth battery on the same camper. I was gonna do the same thing since I can just follow his video tutorial.  My question is, can we put in a larger battery? 

I don’t really understand how batteries and converters work and I don’t want to spend money on it if it’s not needed and also don’t want to buy the wrong thing. 

We want to run a refrigerator for four 4-5 days, charge phones, run ceiling fan. Haven’t bought the fridge yet either. 

Thanks for the help!

JamesDow

 
I put in  a 100Ah Renogy battery in my 2018 T@G and can run my Norcold refrigerator for up to 4 days without solar. I rarely use my Fantastic vent fan because it draws more power (up to 55 watts) than I want spend. I may use it for a few minutes only. As needed,  I typically use a 9" usb battery powered fan on a timer for maybe 2-5 hours a night. No ding on my T@G battery.
I recently bought a BougeRV 12V 30 Quart (28L) Portable Fridge ($209) as a second fridge. It is efficient and with 100Ah battery my tests show 4-5 days usage without solar.
I would suggest putting in a lithium battery between 100-140Ah. For the refer put in what fits.
For charging phones, I typically use a USB power bank. Same as I use with my 9" fan. Battery management can be a challenge. Solar panels are easy to bring into the mix, which can greatly extend your off-grid stay. I have done 10 days in the desert, but ran out of consistant sun, so I had to call it quits. (Planned 12 days) I now have a self made power station with 100Ah lithium, Victron solar controller and 500 watt inverter. 
Going cross country (San Diego-North Carolina) at the end of May. Will need shore power for dog AC when we are at White Sands and Carlsbad Caverns, and after that who knows.
I plan on bringing a 100-watt renogy solar suitcase, 50 watt Renogy portable panel and 45-watt EcoFlow solar panel.
As far as converter, mine (not  lithium rated) will charge my lithium battery to around 94%. I bring a small Eco-Worthy 10Amp to get up to what I want/need.
You could put in more than 140Ah, but then fitting everything in becomes the challenge. If it fits and you want, then go for it.
Changing from lead acid to lithium made a world of difference. After my first 100Ah Renogy battery ($800), I have purchased two 100Ah LiTime 100Ah trolling batteries. The last one I bought cost me $203. Now I have 300Ah to use if I really wanted. 
I recently did testing with and was able to run my AC for 4.5 hours with 100Ah. Gives me a option I previously did not have.
Continue to do your research, run searches on this forum and enjoy the camping experience.

2022TAGowner

Thank you, James, for so much information. I’ve been collecting data and trying to educate myself as best I can before making any purchases. We live in NH and trees and shade definitely impacts our solar. 

Good luck on your trip! Do you have a YouTube channel or social media where we can see your setup and follow your trip?