I did some Googling and it does appear to be inverter-based. There are some YouTube videos which show it running. It is very quiet. Not quite as quiet as the newer totally enclosed inverter models like the EU6500i but much quieter than a standard generator.ES model, I wonder if that has an inverter in it? Being liquid cooled, I'll bet it's fairly quiet as well.
That's my point I guess. Honda made some very nice lawn tractors but they were way over engineered and ended up costing 2X that of a comparable lawn tractor. Most folks weren't willing to pay that much extra and as a result Honda lawn tractors are no more.For several years I had a Honda 3813 lawn tractor with a 13 hp water cooled twin. It was the sweetest running twin cylinder I've ever experienced.
I've had one since they came out. To this day it starts immediately and is surprisingly quiet. It runs smooth as you can imagine a water cooled twin would. I bought it when my wife insisted I get a Y2K generator and transfer switch. Since then we moved into a ranch that has a permanent propane generator so I only use it when I need power out in the field and for the monthly warm up exercise I do on it. I saw the same ad and am thinking of listing mine since I rarely use it.