School me on LiFePO4 batteries conversion in RV

[GmFamBam]

My RV is due for new batteries; it currently runs 2 6v batteries. Want to upgrade them with LiFePO4, RV doesnt have Solar, we usually run the genny in the mornings for coffeee then again in the evenings while making dinner.

Can i just replace them with 2 100ah LiFePO4 batteries?

Will my stock converter/charger be able to charge them?

Or Can I just connect a NOCO or similar charger to them, and everytime the genny runs it will charge them?

Any advice is much appreciated

 

[Sand Shark]

@King Tim and @megadesertdiesel

 

[Justdirt]

Would need to change the converter to LI compatible pretty cheap now a days

 

[HozayKwarvo]

Would need to change the converter to LI compatible pretty cheap now a days

Yep, and depending upon which one you have you may just need to change a jumper setting on the board. I replaced my converter circuit board last season and the new one has a jumper that can be swapped in position to support lithiums.

Without changing the board out, the lithium compatible nocco is a ghetto option but you would want to full disconnect your converter from the equation so it's not beating up the LiPos at an insufficient voltage

 

[Turbo_Manx_Maniac]

I swapped to 2 100Ah LiFePO4 batteries about a year ago. These new batteries have a very low internal resistance and when the charge level is very low will tax your alternator charging system. I installed a Victron 30A DC-DC (much cheaper than Amazon on Marketplace) and it limits the charge current to 30A, and it also works with my older MH battery charger. The DC-DC will take a lower input voltage and increase it, and utilize a 4 stage charging scenario.
You get almost 2x the battery power vs lead acid or AGM because you can't discharge a lead acid battery past 50-60%, but a LiFePO4 will let you use almost 100% of its power, and maintain a steady voltage the whole time. Another benefit is the Victron has bluetooth and lets you see how the batteries are charging. I use one of these to keep track of the battery level, works awesome.

https://www.amazon.com/BINTA-Voltmeter-Backlight-Waterproof-Motorhome/dp/B0DCN9PRD9/ref=sr_1_17?crid=1TFFDHA2PCBQ9&dib=eyJ2IjoiMSJ9.ExXW9n3MpMAs83mPuyaz02L6Fh94stHjm9dtQo6TuvCp1esCOqRJCXUPhYdpfVKg-UF9nqdZpbbS6Q1EibM-WUYQzCC_uin_auSCdLxh2liQJ3otm7wFDdZGroOIQ_FFC1LW57LXRSDihIJvKKRDY1TmKsLRrkCXLoHSRxAkpei9RDwR-9yXIZFT0ijhFMnjoy8ixvYnKfq7H6-CfZ3X2EvePYx5BQ0qmB915DA6m9vUOU4tKwEwsYa8rH_3RHjrEvrj8N8pGK0PXHFqw0taFSDNldjvwvFXMKLVM1Yn6Ds.FZady_01IpVodBLC8EJL-0xQQfLrfYOYRSAG8IAXt2w&dib_tag=se&keywords=battery%2Bmonitor%2B12v&qid=1772766544&sprefix=battery%2Bmonitor%2B%2Caps%2C217&sr=8-17&th=1

Check out DIY Solar Power with Will Prowse on Youtube for cheap but good battery recommendations. They have gone up a lot in the last year, I got 2 Wattcycle 100A batteries for close to $100 each last year.