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A comment on Tesla has applied for a patent for a new electromagnetic windshield-wiper system. Parent comment

Re:Tesla has applied for a patent for a new electromagnetic ... by phkahler on Sunday September 15, 2019 @07:52AM (#20976819)
The maximum power of the car is not relevant to range. A Tesla uses between 200 and 300 Watt-hours per mile if I recall correctly. A Watt-hour (Whr) is a one watt load used for an hour. If it takes you 5 hours to deplete your battery, a 50W load for 5 hours will use 250 Whr. You will lose 1 mile of range because of it.

When doing motor control work and dyno testing, one of the challenges is measurement of mechanical power (and even electrical) because you need to measure up to -200kW but you care about differences of 10s of Watts.

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Re:Tesla has applied for a patent for a new electromagnetic ... by mehhh on Sunday September 15, 2019 @08:07PM (#20980209)
Comparatively, it takes me about 20 watt hours to 40 watt hours per mile to get around in hilly Seattle at a cruising speed of 20mph to 30mph.

Heavy cargo & towing can push my power usage up to 50 watt hours per mile. Note that all numbers are based on no pedaling.

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