I'm after a small generator (no more than 2kw)I'd like the tank to last at least 3 hours on one fill and if it were diesel and silent that would be even better.If it could also have a built in inverter (for home use) that would also be good. It's for UK power so a 3pin socket would be preferable and 230v power is a must.
Something in my aged memory suggest you need 50 Hz. in the UK If so, A 197 volt @ 50 Hz. generator output would be the voltage AND FREQ. you would need. There is no such thing as a quiet diesel engine. I think LISTER engines builds SMALL DIESEL ENGINE WITH AN ATTACHED GENERATORoR SOME YEARS BACK THEY DID.
Edit , never mind my previous answer , you want a D fuel gen for emergency household power Which means you will rarely use it . then by all means spend the extra $2000 to save $20 on the fuel. take care ;)
Honda makes really great self-contained generators exactly like you describe, and, since they're made by Honda, they work well and they last forever (see link, below). Good luck! :-D
You need to START by learning the BASICS about generators. It WON'T have an inverter, because the output is AC from the start. In addition, at 230 volts, 2 kw is LESS that 10 amps. If they make generators that SMALL, they are not worth having.