My 05 has that feature. It's part of the inverter control. Would be easy enough to add though and definitely wouldn't be a determining factor to buy one manufacturer over another. If you have an inverter already check the control panel, it may just be disabled. I disabled mine as I don't want it randomly turning on if I'm not using the coach (I plug it into shore power when home). I just turn it on when I need it. Mine also works off temp. if it gets too warm then it will fire the generator so the AC can turn on. Again mines an 05 so it's not new technology.