Generator

First question why would you need one?

Second question: where do you intend to use it?

Most sites will not welcome use of a genny as they are noisy (even the quiet ones) and disturb other customers on site. 

If wild camping, it’s a possibility the genny will 'walk'. Wild camping brings a whole host of other issues, such as toilet cassette emptying, and needs careful thought. That issue could fill a thread on its own. 

Have you researched solar panels? They can give you sufficient power without noise and need no fuel. Very few vanners use gennies for the reasons given here.

Third question: have you sufficient payload to carry a genny?

Good advice above, check out solar panels and inverters, probably cheaper and safer no flammable petrol to carry (and smell) plus there is no such thing as a quiet genny. I used to have one it was but ditched it in favour of solar as IMO they are amongst the most antisocial of devices to be used on a campsite. Acceptable of course if you are wild camping in north Sweden or need to run one for medical support.

Sorry to sound negative but you did ask.

Honda's are the only gennys to consider but you can get an awful lot of solar for the price of the 2,2Kw one!!

Silent generators DO exist.  I have one.

It runs on propane and uses the Peltier Effect to produce 24 volts D.C. See https://en.wikipedia.org/wiki/Thermoelectric_effect for information on how it does it.

Thermo electric at 2.2kW??

Ok all ty for that has given me a lot to think about 

Mandy and Mark

most sites have EHU included in the price so why use a genny