As a side note: a few organizations in the US were/are developing turn-key lithium systems for the RV industry (not the up-scale luxury yachting buyer, where costs can be ~$5000 for appx 300ah !). AM Solar was one lithium RV developer; the other is SmartBattery Lithium company.
SmartBattery lithium has a "drop-in" LiFePo4 Group 31 footprint replacement for our current AGMs (in our 100ah range) for $1300 each (comparing the price with our existing AGM batteries at $170 each + tax). The weight compare is: our current AGM weight = ~70LBS each : the LiFePo4 100ah weight per battery = (an incredible) 28LBS each. Charging is at 14.6V; charge time is an amazing 2 hours at 50 amps (investigate the mode of charging carefully). The expected lifetime for an RV user is in the 10x an AGM lifespan (that would be roughly 60 to 80 years of lifespan). Operating temperatures for this battery is: 4 below zero F to about 160F (this blows any ancient lead-acid or AGM environmental operating temperature out of the Universe).
Anyhow, as I said, we will probably go this route in 3 years (with this battery, with its built-in smart battery full automated protection: undervoltage preempt; overvoltage preempt; short circuit preempt; Reerse; ICB; and CB).
My disclaimer: do your due diligence; this is what we are contemplating, and don't endorse this route for anyone. Your mileage may/WILL vary.
Silver-
