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A comment on Norway's electric cars zip to new record: almost a third of all sales. Parent comment

Re:Norway's electric cars zip to new record: almost a third ... by goodcanadian on Wednesday January 02, 2019 @01:25PM (#18808593)
A/C also uses battery, but heat uses more energy.

I can't speak for all cars, but mine uses a heat pump for heat. Should have similar efficiency to A/C as that is exactly what a heat pump is.

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Re:Norway's electric cars zip to new record: almost a third ... by tigershark on Wednesday January 02, 2019 @01:36PM (#18808691)
Heat pump with outside temperatures below zero has same or lower efficiency than resistive heating.
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Re:Norway's electric cars zip to new record: almost a third ... by g8oz on Wednesday January 02, 2019 @04:15PM (#18810267)
A modern heat pump with a variable speed compressor can be more efficient than resistive heat down to about -25 degrees Celsius (-13F). See Mitsubishi's Mr. Slim series.

http://cdn.agilitycms.com/mesca/productdownloads/mem-201806-... (page 13)

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Re:Norway's electric cars zip to new record: almost a third ... by tigershark on Thursday January 03, 2019 @03:18AM (#18813629)
And if you use a ground source heat pump (that has to be interred) it would be even more efficient. So? I don’t think that you can put either of them in a car...
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Re:Norway's electric cars zip to new record: almost a third ... by g8oz on Thursday January 03, 2019 @10:34AM (#18815823)
The offerings from Mitsubishi and similar ones from other Asian manufacturers like LG and Fujitsu are air source heat pumps. I see no reason why the tech can't be scaled down to fit a car. It's certainly a reasonable goal for auto parts suppliers to aim at.
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Re:Norway's electric cars zip to new record: almost a third ... by Faaak on Wednesday January 02, 2019 @03:58PM (#18810123)
I suppose the cars heats resistively below zero, and with a heat pump above
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Re:Norway's electric cars zip to new record: almost a third ... by Scoundreller on Wednesday January 02, 2019 @01:33PM (#18808661)
Their efficiency goes way down the colder it gets. They’ll work well at 5-10C, but frost up and require electrically-expensive defrost cycles when it’s colder than -2 or -3 C.
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