[quote=“M.Bas, post:39, topic:2591”]
The only real adapvantage AC seems to have is massive base of consumer/retail appliances dominating the market[/quote]
The real advantage of ac is that it is easy to convert from one voltage to another and higher voltages will be able to be transmitted over a long stretch, dc requires large cables to go just a short way. A problem with using converters is that most converters use a square wave pattern instead of a true sin wave. Your blender and mixers won’t show a difference but computers might. There are true sin wave converters but they are expensive.
For cooking a lot of boaters use propane, butane, and I have heard of the possibility of using methane but I wouldn’t have a clue as to where to buy it. Tying air conditioning to heating like they do for heat pumps on land doesn’t make a whole lot of sense out at sea. The water is cooler than the air at sea so using a heat pump would use more energy than to pump the cold ocean water through the lines and using fans.
Because of the higher humidity, higher voltages are a little more hazardous at sea but not so much that you couldn’t compensate for it. But for the few times that you want AC 120V you could run a small generator for the time that you needed it. Remember if we use diesel made from seaweed and algae, we are using a renewable energy source. Electricity is not the only renewable energy source. We could also make hydrogen from the seawater using dc energy then burn the hydrogen as a renewable energy.
Also remember that a homestead at sea won’t need somethings that a homestead on land would need. The northern Caribbean can get chilly in the winter. You may even need a warm jacket if you are out in the wind at night but it never gets really cold. We had a space heater for our boat but never used it. At most I needed to put on a long sleeve shirt, and that was further north near Florida.
Marinea is intended to be a full service marina so we will need to supply 120V, propane, gas and diesel.