The previous poster's comments about efficiency are correct. Mastervolt published an article where they evaluated several genset's efficiency at low load. They were all terrible.
Mastervolt was promoting theit "hybrid" system, which is an integrated diesel generator and inverter/charger. Unfortunately it is only available at 230V/50 Hz.
But you can make your own. Buy a 5 KW three cylinder, low speed genset like the Northern Lights
. The 8 KW Maspower will be less efficient at under 5KW. Hook it up to a Victron inverter/charger.The Victron and some others have a feature that lets the inverter
pick up the load from a genset for peak motor
starting currents. That lets you run a small genset at high loads for best efficiency. You can also wire it to automatically start the genset when the batteries get low.
If you try simply to run your genset 24/7 without an inverter
you will burn a lot of fuel and you will wear out the genset because they don't like the light load that you will be using at night.
And set up your boat's A/C with a small unit, perhaps 6,000 btu in your sleeping cabin
and a bigger one in the main cabin
. That way with a decent size battery
bank the small one can run all night on just batteries and inverter power. Then in the morning when it starts to get warm, start the genset to recharge your batteries and turn on the main cabin's A/C.
But even with a sophisticated genset/inverter/battery system and judicious management of genset running time and load you are probably going to burn 5-7 gallons of diesel in the genset in 24 hours.
And by the way, do you have the seamanship skills necessary to cross the Gulf of Mexico
, although the N37 does have the range? I would think seriously about flying to Cancun
rather than trying to cruise
there on my own boat.