When running on gas, a small pilot flame must be centered beneath the pot that boils the ammonia solution. If the fridge is not level, the flame will not be in the right location for efficient heating.
When running on electricity, there is a heating element that causes the solution to boil and it is not dependent on position.
A buddy of mine had a motorhome ONCE, and he decided to park it in his very steep driveway so they could start the fridge (on gas) and load it up for a morning departure. He was aroused in the wee hours of the morning to the fire department at his house attempting to extinguish his incinerated RV. The MH was burned down to the chassis and it melted all the siding on his garage wall.
The angle was so steep that the pilot flame in the fridge was glancing off the boiler and onto the chimney which caused the framing of the rig to overheat and catch on fire.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.