I do that.  So that I get the thermostatic control of the fridge, and the
inverter shuts off if the voltage drops too low.  On 12V, it will just
run your battery into the ground.
Edward

 > On another note, is anyone running their Westy fridge on 110 via an
 > inverter, while driving? I believe it's only and 85 watt element??
 >
 > Tom
 > http://tomrowsell.com