Good Morning, Thunder Mountain!
I think you are right on - summer with a/c overloaded their system. Am surprised that at 93 volts there were not motors burning up; in any case the low voltage did not do them any good.
We wanted to have that for a base for a couple of things - Goblin Valley being one; as I wanted to do some early morning / late afternoon photo shooting there. But am not going to chance the low voltage and not going to stay there and stress the electrics in the 5er.
Not sure what I will do but that is next summer fall - when we will be in BV for a while as well.
God willing.