With Onan's sound shield, the genset is nearly silent, so it's nothing more than a background hum.
Ours 7.6kw Mase genset is pretty quiet too. It lives inside it's own sound dampening enclosure, all of which is buried in a dedicated soundproofed genset locker under the salon sole and below the water line. You can stand right on top of it and have a conversation, without slightly needing to raise your voice. Nevertheless, on a peaceful morning, I don't even like hearing the dull buzz. If you sit in the cockpit, it's impossible to hear the motor running, but you do hear the exhaust splash.
Truth be told, I'm usually the first one up in the morning and I'm hoping to get some me time, before the boat full of guests arise. The genset is like an alarm clock. One could easily sleep through it, but they'll know I'm up.
Now the big question for us is switching from an electric coffee maker to a stovetop method. Any suggestions on which you like best?
I find an old fashioned low tech stove top perculator works just fine. It's far from the best coffee, but with the right beans, it's perfectly acceptable and welcome. I have a high end prosumer espresso machine at home, which is my daily driver. I know good coffee, I just don't feel the need to live every moment in that space. Everything literally tastes better aboard anyway. A French Press makes better coffee than a perculator, IMO, but are more difficult to clean.
My go to onboard, however, is a Boche electric drip. I have a 10 cup and a 4 cup. The later gets decaf, when some want it. Both run off the inverter.
I've recently been introduced to a Nespresso pod based espresso machine. I'm an espresso snob and found some of the pods to be remarkably better than expected. Nothing like the real deal, but totally acceptable for a quick hit. Very expensive pods ($0.75 to $1.00 each), but could easily be run off the inverter as well.
My biggest advancement has been to buy one of what I call the gas station style pump carafes. I can get two full pots in there and have one more brewing, which is necessary when we have a lot of people aboard. Having to wait for someone to finish one pot, before I can start brewing the next, is awkward and leaves some waiting or politely not taking the last half cup.