this is something that your dealer should have told you during the PDI.
plus you should have how the 12v side is different than the 110v side.
such as a basic thing that the oulets ONLY work on shore power or when hooked up to a generator.
they don't work on 12v battery power.
heated mattresses are 110vAC only. and if you decided to try and run them with an inverter, your two batteries would be dead in a very short time.
it's a shame how dealers don't go over the basics of RV's with new owners.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC