User manual says not to run unloaded for "extended periods" [ not sure how long that is ] to prevent engine damage, and there is no auto idle. I have a Genrac that is less then half the size and 20+ years old and it has it. I think it would good for economy and noise, and apparently engine life. Just got it today, and have not even put gas in it yet, but am trying to get to know the unit read and study the manual before I do something wrong. It look like a super addition to my home, super friendly so far.
I was concerned that it would be complicated to operate but it stared easily. It seems to have plenty of power and comes with a good set of wheels to make it possible to move it to appropriate locations. Instructions are excellent and easy to follow.
I bought as a backup house generator. I was able to get everything set up in about 30 min. It started right up with not issues. I haven't connected to the house yet but I'm looking forward to having some peace of mind.