Range from the window sticker

[Rt1AWD]

Why there is a contradiction on the sticker? It says range on 91 kWhrs is 312 miles, which translates into 29kW-hrs per 100 miles. However it clearly states 34 kwhrs per 100 miles

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[SpongeBad]

It's likely taking into consideration extended range from regen braking.

 

[sotek2345]

Why there is a contradiction on the sticker? It says range on 91 kWhrs is 312 miles, which translates into 29kW-hrs per 100 miles. However it clearly states 34 kwhrs per 100 miles

The EPA rating there is taking charging inefficiency into account - you lose some from plug to battery and this is measuring from the plug.

 

[Rt1AWD]

It's likely taking into consideration extended range from regen braking.

It's likely taking into consideration extended range from regen braking.

Which means that on the highway, where there is almost no regeneration the real range is around 270, right?

 

[timbop]

The EPA rating there is taking charging inefficiency into account - you lose some from plug to battery and this is measuring from the plug.

EXACTLY. The EPA charges the battery up, runs a test, and then measures how much power comes out of the grid to refill the battery. Since there are losses due to heat and inverter inefficiencies it takes more power from the grid to fill the battery than what actually goes into the battery. Essentially you "lose" 5kwh to put 29kwh into the battery.

The point of the rating is not to measure how efficiently you drive a certain distance, it is to measure how much it costs for you to charge and then drive the car that distance.

 

[Mach1E]

Why there is a contradiction on the sticker? It says range on 91 kWhrs is 312 miles, which translates into 29kW-hrs per 100 miles. However it clearly states 34 kwhrs per 100 miles

Math?

312/3.4 =91


or

91 kw x 3.4 m/kw = 312 roughly

Maybe just a coincidence but it’s possible they divided the wrong thing?

 

[Rt1AWD]

What about commercial chargers. Do they charge you for what they used or for what they put to the car?

 

[Rt1AWD]

Math?

312/3.4 =91


or

91 kw x 3.4 m/kw = 312 roughly

Maybe just a coincidence but it’s possible they divided the wrong thing?

Math? 34 kwHrs/100miles does not translate to 3.4 m/kw, it translates to 2.9 m/kwHr

 

[Mach1E]

Math? 34 kwHrs/100miles does not translate to 3.4 m/kw, it translates to 2.9 m/kwHr

I know.

I’m just guessing where they might have gotten the 34 numbers from. Bad math. Most people got B and C grades in math. That means they got like 25% wrong and still “passed.”

 

[timbop]

What about commercial chargers. Do they charge you for what they used or for what they put to the car?

You always get charged for what the charger outputs (which includes losses in the car from heat), not what goes into the battery. Those EPA numbers are a little off from rounding; the average is about 8% to 12% loss. Regardless, when you charge at home you are still paying a lot less than gas. At current gas prices you are still paying less than gas when charging at public fast chargers

 

[Rt1AWD]

You always get charged for what the charger outputs (which includes losses in the car from heat), not what goes into the battery. Those EPA numbers are a little off from rounding; the average is about 10% to 12% loss. Regardless, when you charge at home you are still paying a lot less than gas. At current gas prices you are still paying less than gas when charging at public fast chargers

I don't agree. 2.9 miles per 45 cents/kwHr is 29 miles per $4.5, which is approximately the same as on gasoline

 

[Maquis]

You always get charged for what the charger outputs (which includes losses in the car from heat), not what goes into the battery. Those EPA numbers are a little off from rounding; the average is about 10% to 12% loss. Regardless, when you charge at home you are still paying a lot less than gas. At current gas prices you are still paying less than gas when charging at public fast chargers

How are you calculating that? A gallon of gas costs about $3.00 here. A gallon of gas is equivalent to about 30 kwhr of electricity. The cost would have to be less than $0.10 per kwhr to be cheaper than gas.

The operating cost advantage for an EV is their efficiency, not the raw fuel cost.

 

[timbop]

I don't agree. 2.9 miles per 45 cents/kwHr is 29 miles per $4.5, which is approximately the same as on gasoline

Ah, I see you are in California. I don't know if it's available where you are, but many members from here have posted that they take advantage of offpeak rates to do their charging at home.

 

[Rt1AWD]

How are you calculating that? A gallon of gas costs about $3.00 here. A gallon of gas is equivalent to about 30 kwhr of electricity. The cost would have to be less than $0.10 per kwhr to be cheaper than gas.

That is not correct either. A gollon of gasoline is approximately equivalent to 10 kwtHrs in terms of modern car efficiency

 

[Rt1AWD]

Ah, I see you are in California. I don't know if it's available where you are, but many members from here have posted that they take advantage of offpeak rates to do their charging at home.

I was talking about fast charges. There is no offpeak on fast chargers. It is always 45 cents per kwHr or more

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