Somewhere I read that a battery will loose 3 percent of its caharge/day.
Seems like alot to me.The westy frig is wired to turn the fan on at 140
degrees F. It will then shut off at 120 degrees(per Dometic manuel)If you
park  it so the side that has the frig is in the sun, I can see the the
fans coming on all by themselves in the summer.Thisis with the stock relay
for the westy stuff.