[labatt]

And just one point of clarification - you can have a fridge and freezer without a generator. I have two "4D" batteries (plus a third battery dedicated for starting the engine). In addition to the GPS, chartplotter, instruments, lights, fans, autopilot, VHF, stereo, and one or two laptops, it powers both a fridge and a freezer. The batteries are 12volt DC, so everything you get has to be able to support that - but there's a large boating supply industry and you can get pretty much anything you want in a 12volt version. When at a marina or dock, you can usually connect "shore power" to your boat. This means you bring in a higher amperage (30amp, 50amp, or other) AC connection to your boat which can then power your regular 120v AC electrical outlets and charge your batteries (with the appropriate equipment on board). You can also buy an inverter which will convert the DC output of your batteries to AC power
and allow you to use those AC outlets without being connected to shore power. If you need to power larger devices (70" plasma screen?) or air conditioning, you can buy a generator, but now you're talking a lot of bucks...