This makes no sense to me. RVers are switching to lithium and the RV community is all agog with them. Using solar panels and 6 or 8 or more lithium batteries and running microwaves and AC and washer and dryers. Not all at the same time, obviously, but you get the point. It might be the charge controller and might end up being more than I'm willing to go through, but it's worth the looks.
On a side note, my Superwinch remote will actuate even when the machine is off. I've noticed this several times and I believe this is a big contributor to me needing my 3rd battery, 2nd battery, in 4 yrs. Both AGM. First was Odyssey PC 925 and 2nd was Wal-mart.
Good luck whatever you decide to do.
Having lost two RC cars that were worth each approx 1k I can assure that I have seen mine with 3 others catch fire mid run and 3 of the total of 5 were right after a water crossing.
Lipo batteries and water do not mix at all.
In the RC hobby there are actually fireproof bags people buy to charge them because they are known to let go mid charge.
Are the RC batteries and the auto, rv batteries different I am certain they are but with the vibration, water and general abuse a battery can take I won't risk it.
And at an initial investment of 600 to 700 dollars I can go through a whole bunch of AGM batteries.
The other issue to consider is that lipo batteries do not like to be discharged below 3.0 volts before damage occurs and then there is the continued need to trickle charge them to keep the voltage between 3.0 to 4.0 volts per cell.
A 12.8 volt RV lipo battery will be 4 3.2 volt cells to make a 12.8 volt battery and I do know that in the RC world they require a balance board and balance charger so the battery will charge evenly.
We are approaching this from totally opposite sides, you see cost over time vs. Initial investment and I couldn't care less of those concerns I just see the safety side when I am powering an 8hp electric RC truck and know the issues I along with a group of friends have seen or had.
I am by no means saying you are wrong or shouldn't if it is what you want I am just pointing out how I see things and why I wouldn't.
Once again I wish you the best and hopefully I am wrong on all accounts and you pass me on the trail.