Sailing things right

Today is a "winter-trial" day. No sun, permanent rain, 18° inside (which is about a functional minimum for me).
The solar panel gives no power, which raises again the question about other ways to supply myself with electricity.
Wind generation isn't an option. It requires space and money that I don't have, plus for the decent power generation with the wind it has to blow about 25 knots which is quite rare and way above the comfortable level.
So, I need to buy a generator and burn fuel when the sun isn't available.
Yes, I can run the main engine, but it's even more inefficient than the wind (though always available).

So, if anyone has a small generator for sale in Europe — I'm open to offers.
Preferably, DC 12v, but inverted could be ok too.