Dragon Rider
Checked the el cheapo jugs out 150W 30minutes plus+/.... EC passed that's crap, as it's not marked on the jug they replace if faulty anyway.
minutes plus to boil with dead cold water.
Plastic cheap the lip will dribble;when pouring.
Waeco
Dead cold water full jug I have never ran it this way as two cups
with pre-warmed water takes 8 to ten minutes.
However 22mintues from cold to hot 0.5w drop off from auxiliary line.
Voltage at mains constant ripple volts 13.9 9v to 14.2v...Battery temp increase 3 Fahrenheit it does work the battery.
oddly enough I could feel no heat transfer as the jug was sitting on the fridge, but it jumped 3 Celsius inside yes it was switched off.
I'd say the average for two cups with warm water would be 10 to 12 minutes.
Hope this helps you .
Richard
PS instant coffee one minute 8 cup jug a lug 240 V 2800 watts use a 11 K gen-set. if your impatient.