Thor Forums

[gmc]

Aside from Harris batteries - the answer is of course 'it depends'...
How cold directly affects how much the furnace will be running.

These are not insulated like houses. Haven't done extreme cold weather - but has been in low 30's - frost a few times / snow on one occasion).
Burned through a LOT of propane rather quickly... so keep that in mind too.

I'd suggest monitoring the battery voltage in your usage conditions to get a better feeling of how long you can go...
And while you don't want to overly discharge the coach batteries - if you do mis-calculate - the 'Emergency Start' switch is a 2 way street... It will start the engine from the coach batteries - and - it will start the genny from the chassis battery.

Depending on how cold - also know what water lines might not be in heated space... That varies by rig - some heat a storage bay that contains plumbing... others are fully inside the RV... At least part of the drain system is likely exposed to outside temps.