The EV Transition Is Harder Than Anyone Thinks

Re:The EV Transition Is Harder Than Anyone Thinks by jwr on Wednesday March 29, 2023 @03:25AM (#35353792)

That was my impression as well. I'm in Poland, and 9kW is what you'd expect for an apartment or a small house. I needed 17kW for a small country house recently, but that's because of a "flow-through" water heater (no boiler tank) which makes sense in installations which aren't used every day.

A heat pump can heat/cool a small modern insulated wooden house with a 200W-450W power budget, throughout the year, with outside temperatures below freezing.

I installed an EV charger recently, with an 11kW of power allocation.

All that is way below the power in the installation mentioned…

US houses are incredibly inefficient.

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Re:The EV Transition Is Harder Than Anyone Thinks by fomine3 on Wednesday March 29, 2023 @04:16AM (#35354128)

I'm in Japan, and people even use less. 3-4kW is standard for a condo, 4-6kW is standard for a house, 10kW is max in general for a house with induction cooker and heat pump boiler tank.

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Re:The EV Transition Is Harder Than Anyone Thinks by BrentOzar on Wednesday March 29, 2023 @07:26AM (#35355576)

We're not in Poland. Like I said in the post, I'm in the Nevada desert, in a 400 sq meter house, with a pool and a hot tub.

Here's a weather comparison to remind you that year-round, the highs in Krakow are lower than the LOWS in Vegas: https://weatherspark.com/compare/y/85104~2228/Comparison-of-...

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Re:The EV Transition Is Harder Than Anyone Thinks by jwr on Wednesday March 29, 2023 @10:32AM (#35357855)

I understand that. So include a 1.3x factor for cooling over heating (heat pumps are more efficient when heating than when cooling). That's still a far cry from the wattages/amperages mentioned.

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