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0 pointsjerven7y ago0 comments

That is an unreasonable number. That is 160 kwh of power which is double the largest model 3 battery. This would require everyone to drive nearly 600 miles a day at highway speed. Roughly nine hours of driving a day at 75miles an hour.

The expectation is that people drive 30ish miles a day. This is about 11kwh. Over 8 hours a night, well within reasonable limits.

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bonzini7y ago

I was thinking of 10 kW * 2 cars, but actually even for a single car you need 120 kWh to charge 85 kWh. You're right that it won't happen every night for 8 hours, I was wrong about that.

Problem is that you have to size for the worst case, which may happen only once a year, but it will happen. Everyone coming back after Thanksgiving. Everyone reaching a vacation place on a Sunday evening in the summer. Bam, 20 kW sustained for a few hours.

It takes only a few big condos before you need to bring 400 kV lines downtown...

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0 pointsjerven7y ago0 comments

The expectation is that people drive 30ish miles a day. This is about 11kwh. Over 8 hours a night, well within reasonable limits.

0 comments

bonzini7y ago

I was thinking of 10 kW * 2 cars, but actually even for a single car you need 120 kWh to charge 85 kWh. You're right that it won't happen every night for 8 hours, I was wrong about that.

It takes only a few big condos before you need to bring 400 kV lines downtown...

j / k navigate · click thread line to collapse