[jimhefferon]

What about compared to putting a cup in a kitchen microwave?

[jwilk]

Microwave ovens are not as good as electric kettles, but still better than gas stoves.

https://www.nytimes.com/2019/05/29/climate/nyt-climate-newsl...

"an overall efficiency [of a gas stove was] only 30.5 percent"

"The microwave was a bit better; it clocked in at about 43 percent efficiency."

"[Electric kettles] hit 70 percent efficiency."