what is an average miles per kwh for an EV

[monster]

hi all

im just doing some sums for an electric vehicle and it is coming out at 3 miles/kwh. this is about 10 times what my electric bike does and i was wondering if its normal. speed was about 20 mph.

what is an average miles per kwh for an EV?

 

[Malcolm]

I don't think that's too far off, maybe a little on the high side. From looking around at the examples on the EV photo album that's the sort of consumption you could expect from a small family car. What are you planning?

 

[jondoh]

wait a second, KWH = kilowatt hour, right?

3 miles/kwh is very very low compared to an electric bike. at 20mph, i'm looking at more like 40 miles per kwh. my pack is a 0.5kwh milwaukee electric pack (56v x 9 ah) and I can go 20 miles at 20 mph.

 

[Link]

3mi/kWh sounds about right for a car. It is low compared to an ebike, but that's to be expected. It weighs a hundred times more and has a way bigger drag profile.

 

[monster]

hi

just realised what i said was wrong. i meant that my electric bike was 10 times what the car did so my bike gets 30 miles/KWH and the car only gets 3 mile/kwh.

whoops

 

[drewjet]

I think the standard way of expressing it is watt/hours per mile (or kilometer if you must use those easy metric measurements)

Bikes are generally around 20 to 30

Motorcycles 80 to 100

cars 300 to 400

 

[monster]

thats weird because gas use is in miles per gallon or per litre, so why invert the whole thing for EV's.

 

[vanilla ice]

I agree it feels kind of backwards to say it that way. Miles per kilowatt hour works best for my head.

 

[Link]

Seeing as how I've never owned or even driven a car, I can deal with either way. I'm slightly more used to seeing Whr/mi, but mi kWh works, too. Is they're a preferred way of saying it?

EDIT: 10kW mark. Nice.

*passes out beer/soda/what have you*

 

[andrew]

If you express it "backwards," it allows for easy calculation. For example, if you say your EV gets 300 whr/mile at 55 mph, than you can multiply 300 whr/mile * 55 miles/hour to get 16500 watts, or the power. If you drive an hour at this rate, you'll use 16.5 kwhrs.

But, it seems to be harder to understand at face value.

Just think of saying your car gets .05 gallons/mile at 55 mph. .05 as a number doesn't seem to have much meaning to our brains because it is so small, but if you multiply it by 55 you get 2.75 gallons/hour now that's an interesting way to express power. At 2.75 gallons/hour at $3/gallon, that's $8.25/hour!

Anyway, 333whrs/mile at 20 mph is very high. It should be much lower than this for a car.

 

[TylerDurden]

Anyway, 333whrs/mile at 20 mph is very high. It should be much lower than this for a car.

A converted ICE car could be pretty heavy and use that much. A lightweight car could use as little as half.

 

[andrew]

At 20 mph it is very high. Maybe normal for higher-speed driving.

 

[PJD]

[a car] weighs a hundred times more and has a way bigger drag profile.

A e-bike and adult rider weighs at least about 200 lbs. A Toyota RAV-4 EV with 4 occupants weights about 4200 lbs, for a factor of about 20, not 100. As far as drag, bikes the aerodynamics of bikes and and motorcycles are pretty poor. A well-designed subcompact car probably does not produce a lot more drag than, say my scooter and a rider.

 

[Link]

[a car] weighs a hundred times more and has a way bigger drag profile.

A e-bike and adult rider weighs at least about 200 lbs. A Toyota RAV-4 EV with 4 occupants weights about 4200 lbs, for a factor of about 20, not 100. As far as drag, bikes the aerodynamics of bikes and and motorcycles are pretty poor. A well-designed subcompact car probably does not produce a lot more drag than, say my scooter and a rider.

LOL, accursed hyperbole!