The most efficient way is an electric kettle and the best is a Russel-Hobbs
in stainless (British). They will boil a liter less than 2 minutes, but it
draws a lot of current. You must have a generator. Forget batteries.
Steve

wrote in message
...
I wonder what would be the best and most economical kettle to use to boil
water while cruising.
For year I have used an aluminium enclosed kettle with a whilst on a Origo
non pressurized alcohol stove.
I did not any better ( and still do) and was satisfy with the time to
bring water to a boil, the pouring and the filling.
Today I am looking at propane and the purchase of a new kettle and I
wonder what would be the best buy?
On a long cruise/crossing the more time it takes to bring water to a boil
means more propane.