Batman, I have heard that those Honda generators are extremely quiet. But they look to be a lot more expensive then a battery and inverter.
They are very quiet but expensive and I think they are inverters, but not sure. I have two large generators and they are annoying, but I'm ready for a hurricane. One is 6K watts and the other is 10K watts. Need to convert the 10K to propane still. If you get a generator, make sure it runs on propane. No carburetor problems with it after it sits.