You typically should not let your batteries go below 11 volts. If you set the voltage to 11 on the auto start, the generator will start top them off and you’re good to go.
We use the temperature setting a lot as we have two dogs we can’t take everywhere with us. We keep the windows cracked and the vents open as a fail safe, but the gen auto start has always worked. We set the temperature knob to 76, make sure the thermostat in the rig is in the cool position and the dogs are good to go. When the temp in the rig reaches 76 the generator starts and then the AC comes on. Once the rig is cool it all shuts off.
Love this system. A lot of owners don’t even know it is there.
Here is a link to a PDF with instructions, if you need them.
http://www.magnum-dimensions.com/sit...005-ME-AGS.pdf