Originally Posted by Inland RV Center, In
The only appliance that can be damaged, by low line voltage, is the AC.
The compressor will destroy itself on low line voltage.
A microwave will not work as well on low line voltage, but it won't be ruined.
With one of our first trailers - and Award - we had the voltage dip very low at a campground while we were away from the trailer. It was an extremely hot day in Maine.
When we returned we found the AC stopped, the trailer very hot, and the voltage (I had a voltmeter installed reading barely over 100v.)
I switched the AC off - even though it wasn't running - and was pretty well convinced it was toast.
A couple of hours later in the evening, the voltage had come up and just to see what might happen I switched the AC on - it ran fine and continued eo work perfectly for several years, we then sold the trailer.
I don't know what happened, but my guess was that the AC had some sort of self-resetting thermal overload in it. Not sure if that is the case, but in any event it was just fine.