Hello WA_Aistream!
I am the guy in the white 19' 4x4 you met in Boyer.
My wife were at Boyer again last weekend, toasty warm in the below freezing weather. This is our second 19', having a 2019 for less than a year. We don't winterize at all, because there is plenty of opportunity to drive to the Oregon coast in the winter. Never have I had a freezing issue. Never, even in 15 degree weather when we went to Winthrop. We converted to ReLion Low Temp lithiums, that have built in heaters using the charging system voltage to preheat the batteries before charging. Airstream should have used these instead of Battleborns. Though the BB are good Batteries, with the batteries being installed on the exterior, cold temps will kill BB if they are charged below freezing and not disconnected from the charging system. Good luck the the Atlas! Very nice units. We have had some issues with ASANW, so you have to stay on top of them to get things done. Nice people, AS warranty policies suck. 8 months, 4 visits, still a non working awning. Also, they carry very little in the way of parts, therefore multiple trips to get things fixed.
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