> I wonder if some kind of big floating energy station could be a thing

Congratulations, you have just re-invented offshore (floating) wind turbines. https://duckduckgo.com/?t=ftsa&q=floating+wind+turbines+&ia=...

> I guess you don't have to pay anyone for the space or worry about too many regulations etc.

I'm ammused you think offshore energy is lawless. It's the same assumption that had the entire maritime community laughing at the clowns behind 'Seasteding" and the amusing MS Satoshi 'cryptoship'.

I found your reply unnecessarily snarky. The possibility I'l pondering would be to have a facility in deep ocean, far away from any countries coastline, but near shipping lanes.