Outer Limits 4x4 Board

Not sure if this is really tech or not but do engel fridges have to be sitting flat when in use? Since i am planning on just having it sitting on the back seat of my ute. If it matters the one i am talking about is an old yellowish 40l.
Thanks Geoff

Shouldnt be an issue, they are advertised as working at up to 30 degrees.

They run fine on angles.

Steve.

I've seen 2 quite happily run upside down