I like making my own things to improve life at sea, whilst saving a lot of money. I raided a car breakers yard some 20 years ago and removed the heater matrix and fan from a car, connected it to the fresh water cooling side of my engine and that gives me free hot air every time the engine is running !
Another idea ,although ive never tried it yet, is when sailing for less drag you leave your prop spinning ? So the idea is to run a small alternator off the shaft inside the boat ?
