Reminder: Heat must be dealt with. Fans are noisy. If the inverter uses fans rather than just a big heat sink to cool itself, it's going to be noisy. Period.
If you are going to purchase and use such an inverter, for heavens sake, plan for that. It's not a bug, it's a feature.
If you can't isolate / shield from fan noise, purchase a SCC that doesn't require fans for cooling. Victron makes some great ones, but you may need several because they can only make those heat sinks so big before it becomes impractical. It's OK if you use several of those SCCs in the same system. Your batteries won't care. You will, however, need a good-sized bus bar to make multiple SCC connections. Plan for that.
Producing electricity through PV panels and a charge controller creates heat as a byproduct of that production. That heat must be removed from the equipment. Fans and smaller heat sinks can do that, or large heat sinks can do that without fans. But you gotta get rid of the heat somehow.
The same applies to converting electricity from DC to AC through an inverter, although you don't normally need to deal with as much heat for that. So, the fan noise is usually less. But it's still there, and sometimes it happens while the fans are running to cool things down from the solar production. When all that's going on at once, it's even noisier.
Again, though, it's a feature, not a bug. Heat bad. Heat must go away. It's all in how that's accomplished. I don't think it can be much simpler than that.