This problem is solved in its entirety by simply microwaving a cup of water. No wasted water.
If the same / similar cup is used, one can choose the desired temperature of the resultant hot water simply by varying the time. Seasonal variation of ambient water temperature may need to be taken into account.
I tend not to drink coffee, and I prefer to make tea with less-than-boiling water.
YMMV
</opinion.
Now that I’ve written that, I’ll have to put a power meter on the microwave and a kettle and report back with the results. My kettle recently broke and I hadn’t intended to replace.
I've tried that, and there are two problems. One is that water has a tendency to superheat and then boil all over the place when you put the tea in, or it suddenly produces a big bubble and water goes everywhere. The other is that it is hard to get a consistent temperature. Even if you measure it with a thermometer it seems problematic (although perhaps the grocery store thermometers go out of calibration easily). If you're doing herbal tea it might not matter as much, but for something like Chinese green tea, it was always hit or miss. I bought the Bonavita kettle as soon as I found out about it, and now I always have consistent tea with no fuss or mess.
My daily driver, a flatbed Panasonic microwave, does a good enough job, but yeah actually boiling the water in a microwave is a recipe for a way too hot cup, and half the water boiling over.
220ml, regular ceramic mug, one minute forty, does what I need, but I’m not tea or coffee connoisseur, just a prole with a box of Twinings loose leaf.
Thanks for the kettle reference, I have been meaning to find a temperature controlled unit.
I recently picked up an inexpensive Thomson branded electric frypan with digital temperature and time controls, well impressed.
I'd guess that a microwave would "waste" more energy as it's got moving parts and the energy isn't completely directed to heating the water. A kettle also "wastes" some energy as you end up heating the kettle too (from the hot water).
If a microwave was more efficient, I'd expect to see premium kettles that used microwaves instead of a simple heating element, though maybe there'd be design problems with preventing leaking microwaves.
This problem is solved in its entirety by simply microwaving a cup of water. No wasted water.
If the same / similar cup is used, one can choose the desired temperature of the resultant hot water simply by varying the time. Seasonal variation of ambient water temperature may need to be taken into account.
I tend not to drink coffee, and I prefer to make tea with less-than-boiling water.
YMMV
</opinion.
Now that I’ve written that, I’ll have to put a power meter on the microwave and a kettle and report back with the results. My kettle recently broke and I hadn’t intended to replace.