I will basically retype my thoughts to you here. Others can comment...
The BVI has the trade winds... a constant breeze and moderate climate. Down here, we often have no winds and it is in the 90's and feels like the 100s. Very hard to sleep in that.
If I was going to buy another generator, I would go with a 110v and one where I could get tractor parts easily. I would get something with a low RPM but made to run for longer periods of time. One example is this generator:
NEXT-GEN - Marine Power Units
If you go with a DC generator, aren't you also now going to have to invert that power for air conditioning? So in effect, your ability to run your air conditioning or your hot water (etc, etc) is now dependent on not just one system working well, but two? A system that depends on a system sounds like a nightmare in the making to me.
I think the Next Gens are simply a Kubota engine (Mitsubishi) outfitted to work in a marine environment. The benefit of that is parts will be easier to come by (tractors are all over the world) and cheaper. For example, I have a Mastervolt 3.5 kw. My fuel sensor went out. I had to have it custom made in Italy, shipped to Holland, and finally sent to me. Other than the absurd cost, it took forever and put me in a marina until it arrived.
Your solar setup will take care of most of your power needs - EXCEPT hot water and air conditioning (remember I have 780 watts). THat is about all you need a generator for. You can run your main engine for hot water (and we often do as it also charges the batteries), but there is no way to get around a generator for air conditioning. As such, I would personally get a 110v generator. I would like in the 5kw range. I would get a low rpm (1800ish) generator that minimizes vibration, noise, and are made to run for longer periods of time than those like mine which run at high rpms and really are not well suited for long-time running. This is assuming you can handle the footprint.
When you crank up your generator, it is a great time to give your batteries a good charge, heat your water, and of course cool the boat down. You may want to run this thing all night. Down here, we often do. My poor little generator cannot keep up with all that load so I have to be picky on what runs and it is a real hassle.
On the matter of water makers, I would get a 110v system with high water output. I would get more of a homemade model. I have some links somewhere if you want them? The reason being that you will have a generator anyways. You don't want to run your watermakere all day and night. You want to maximize your time when you are running it - get it done and move on to something else. The theory thrown out is that whenever you want water, you just turn it on and voila. However, you are going to find that MANY of the places you are moored/anchored, you will NOT run that watermaker. The water is grosse (people dumping their heads in it, city run-off, etc). As such, you may want to weigh anchor and make that water while between ports or on a casual sail out of the bays. You will want something that makes a lot of water in a short amount of time. Plus, it gives you the flexibility of washing your boat, your clothes, and other things without having to wait all day to refill your tanks.
I really like the very simple, basically build yourself, units. KISS on watermakers seems the only way to go. On the Tayana, it has a Spectra. All you have to do is press start and it basically runs the pre-run, checks the water quality, etc. It is very efficient and runs off 12 volts. However, (big however), that thing is finicky. All you need is for one sensor to go out and it malfunctions. I know... it happened! So if you get a simple watermaker with basic spare parts and filters, then yeah, you gotta watch what you are doing while you are doing it, but parts are cheap, available, and troubleshooting is easy.
I learned the hard way cruising that how much money you have really has no bearing on how well things work. In fact, the more expensive and complicated items are often the ones that like to break first. And again, it does not matter if you are Bill Gates, when you are 200 miles offshore or off of the Tortugas, and your X quits working, no amount of money is going to get it fixed. You are on your own. So keep your systems simple, understand how they work, always think about parts and how you could get them (forget the cost, simply getting them is a killer), and stay with things that are tried and true.[/QUOTE]