For our dogs, we figured the nightmare scenario would be to lose power to our ACs during summer heat.
Instead of just getting a temperature monitor, we installed a Magnum AGS (Auto Generator Start) system in our RV.
Basically, the AGS will power up our generator if either battery voltage drops too low
or if the inside temperature gets too high.
Both the battery and temperature levels are adjustable.
Magnum AGS - Stand Alone Version
Magnum AGS - Netwrok Version