We use a travel kettle, bought at a big caravan dealer back in the early '80s, still working well - it's 700w so takes it's time to boil a litre of water - but not much different to a modern 1kw kettle.A standard domestic one but with lower wattage than you would buy for a house. The “ dedicated” leisure ones are over priced and not that reliable. Bear in mind the current rating of your electric hook up. Power = volts x amps. So if you divide power by volts (240) you can get an idea of amps. Cannot remember precisely what make we last used, but it came from Argos. Think it was around 1 kw as a travel kettle.
When you're already lugging a dual fuel cooker, a dual fuel fridge and a dual fuel heater, the extra weight of a kettle is insignificant.Depends what sort of caravanning you do
Off grid. Gas / hob
Always with EHU. Electric
If you do both stick with a hob gas.
Why lug two kettles around
We had a Quest kettle for about 18 months which is why we bought the Swiss Lux.+1 Quest Kettle and is 800W, and there are plenty of low wattage models for you to choose