Welcome! You will find a lot of great advice ( and some not so great) but for best advice add your make, model and year to signature and make sure you add the exact model of appliance you want advice on.
We don't camp off grid a lot but when we did I was always fear full of running battery down to keep warm.
On batteries, switched to Lithium from Renogy and 2 100 watt panels with an MPPT controller. Since then I camped 4 nights with snow at night but every day my battery was back up. Good systems will even give you state of charge in amps so you know at a glance how your battery and solar is doing. And no water to add or check, no worries about going below 50% charge, keeping on trickle charger and much lighter weight have aboard or carry.
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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