Oh, those 650 watt-things will probably do then.
A fridge will only pull about 300 watts from time to time, lights are as much as you want to use (5 x 60 watts?)
The only doubt I have is a kettle, they normally go well over 1kW, somewhere 12-1400 I believe
Last year we got away with a 2,5kW, and we had lights, stereo, fridge and beerdraught machine. Oh, and I brought my air compressor too for the airbeds. Don't get too lazy now
Above machines were fine, exept for the compressor. The lights went a kind of low when we used that thing