Reasonably well-built, has useful indicator light.
ROADKING KETT040233M Electric Car Kettle with Base | 600ml | 12v
£19.99 (All Ride, part number from instruction sheet 871125204023). Slower to get a cup of water hot than the immersion, but feels much safer (eg the cable does not get hot), and more hygienic, and doen't look out of place in the kitchen plugged into our 12V off-grid supply, though dwarfed by our mains kettle beside it. One test of the kettle (200ml water) had the water getting hottish after about 8 minutes and just boiling in about 20 minutes. Quite a lot of this energy goes into making the kettle itself warm! Happily accommodates a skimpy cup's worth of water for speed; could accommodate 2--3 cups of water, but you'd be waiting a long time for it to get hot! I did make a big mug of noodles though. Easy for me to plug in and use now when the sun is out. Spec: 600 ml capacity, 12V operation, 175 x 175 x 115mm, 95cm lead and cigar plug fitted, dashboard mounting, 'Soft Touch' on/off switch, auto off and dry-boil protection, ~150W (as measured).