Comment by kirrent

I lived on a catamaran around 2000 onwards as a kid. Solar panels were surprisingly widespread, particularly on multis with outboards (and therefore limited ability to make power through alternators). Obviously the $/W sucked, but people also didn't have as many power draws. One big drawback was older generations of solar panel had terrible performance in partial shading. A stay or rope shadow passing over the panel was a big issue because of fewer bypass diodes, simpler battery chargers, and so on. That sort of thing is a bigger issue for a yacht with less clear space for panels.

So there were a lot of diesel powered yachts generating power throughout the day. Something that was pretty common back then as an adjunct (and much rarer now) were small wind generators. Seemingly you could choose between noise and power output because the fancier ones made a racket and the quieter ones always seemed to be on boats idling their engines all the time anyway. When we entered anchorages, we'd make sure to avoid being near the loud ones. I can't imagine what it would have been like living with one.

Hydrogenerators weren't very common (they're a bit more common now) but my dad was given an old 12V tape drive motor by a friend and I remember him letting us help him build a towed generator. The tape drive motor sat on the back of the boat connected to about 20m of rope going to a dinghy propeller on a piece of stainless rod to try keep it underwater. Drilling a hole through the motor shaft with a handheld drill was the most time consuming part of the build. We called it toady (short for towed generator) and watching the input Ammeter on the battery bank go all the way up to 6A on a cloudy day felt like magic. It's part of what made me want to be an electrical engineer as a 10 year old.

Given all that, on a 19ft outboard powered yacht in 2002 a generator probably was the best solution for one voyage.