Originally Posted by patvogelman
2019 Montana 3121RL
Time to replace my 12v group 27 acid batteries (2)
Was looking at making the change to lithium battery for more capacity and longevity. Expert Power Lifepo4 100ah with 20ah lithium charger.
Question: Is there any changes you have to make to accept different batteries.
What about truck charging when traveling?
Do you have to change the converter in the Montana ?
Also if we buy a generator is there any specific type?
Would like a little Honda if compatible.
There is a lot to consider in your questions, but it really depends on if you need to go to the expense of LiPo4 or not.
If you are a full timer then get Lithium, if not you probably will not realize all the benefits of an investment likely to be closer to $5,000 than not.
However the specific answers are
If you are getting a pair of 100AH x 12V then you want a charger of at least 50A better is 100A.
Different batteries generally mean different chargers but most good one's can be set to any type. Lithium is very forgiving as well.
Truck charging can be done but it's tricky. Done wrong can melt your alternator. Get expert advice from a Victron dealer.
I removed the converter because if you are full time and need Lithium, then you need an Inverter/Charger. Many full timers use the Victron Multiplus 12/3000/120-50 120V or the newer version. Those numbers mean 12V battery vs 24V, 3,000W or 2,400VA, 120A charger, 50A pass thru 120VAC system.
I use a pair of Honda EU2000i. You want an inverter type gennie if you have sensitive electronics. There are brands that have ripped off Honda and Yamaha for less money.
Best advice is find a solar dealer to guide you.