Bob, Sounds like your qouting B-52's in your signature.
Since your in NY area I would suggest either going with AGM's (I have some 6volt AGM's under my steps and love them) or install the Lithums "inside" your RV so they dont freeze at night.
I think they say you can let the Litiums Freeze but you cannot charge them when frozen? But I would not like to be one one the runed my brand new $800+ Li the first winter to find out they were wrong.
Personally unless you using your RV around 5 / 6 mo (+) a year I would go with AGM's.
But to each his own.
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2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
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