How much does it cost me to fully charge and drive my car?

[atikovi]

Not sure how to run the numbers but here is what I got.

Last electric bill including all the fees and charges of $111 for 522 kWh usage = 21 cents a kW
2013 with 9 bars which I understand has a 24 kWh battery

So if the range is down to say 17 miles or 25% of the 70 mile range, it will use 75% of 24 kWh's or 18 kWh to fill up.

18 kWh x 21 cents = $3.78 for 53 miles.

That's about 7 cents a mile.

Does that sound accurate or am I missing something as that doesn't seem all that impressive compared to gas cars.

My Jetta gets 40 mpg overall on $3.30 gas which comes to 8 cents a mile.

 

[cwerdna]

Not sure how to run the numbers but here is what I got.

Last electric bill including all the fees and charges of $111 for 522 kWh usage = 21 cents a kW

Look are your bill again. You were for sure billed for energy (kWh).

If you have demand charges (not common for US residential plans), you'd be also billed for demand, in kW. The rest of your unit usage was correct.

You should come to California. Pacific Gouge & Extort EV2-A (see page 2 of https://www.pge.com/tariffs/assets/pdf/tariffbook/ELEC_SCHEDS_EV2 (Sch).pdf) is 32.4 cents per kWh off-peak. Rest of day, it's 49 to 63 cents per kWh.

What year, transmission and engine of Jetta do you have? '24 automatic is rated at 34 mpg combined: https://www.fueleconomy.gov/feg/Find.do?action=sbs&id=47055.

 

[atikovi]

Look are your bill again. You were for sure billed for energy (kWh).

If you have demand charges (not common for US residential plans), you'd be also billed for demand, in kW. The rest of your unit usage was correct.

Not sure what you are saying. My bill is $111 and I used 522 kWh. That is the total amount I pay for power in one and only bill.

 

[cwerdna]

"21 cents a kW" is wrong. If you said 21 cents per kWh, then you'd have used the right units.

I'm also saying some parts of the US have residential plans w/demand charges. Those would be per kW, in addition to energy charges (per kWh). https://web.archive.org/web/2017032...files/documents/686294116/DemandEducation.pdf discusses demand charges, if you wish to learn some gory details...

https://teslamotorsclub.com/tmc/thr...rge-at-48-amps-or-32amps.257915/#post-6453354 has some pointers to a few places that do that.

 

[marshallinwash]

Not sure how to run the numbers but here is what I got.

Last electric bill including all the fees and charges of $111 for 522 kWh usage = 21 cents a kW
2013 with 9 bars which I understand has a 24 kWh battery

So if the range is down to say 17 miles or 25% of the 70 mile range, it will use 75% of 24 kWh's or 18 kWh to fill up.

18 kWh x 21 cents = $3.78 for 53 miles.

That's about 7 cents a mile.

Does that sound accurate or am I missing something as that doesn't seem all that impressive compared to gas cars.

My Jetta gets 40 mpg overall on $3.30 gas which comes to 8 cents a mile.

It depends on where you live. average gas price in Washington state is currently about $3.90 a gallon. Costco has the cheapest price at $3.49 a gallon. Numbers are from Gas Buddy.

My cost is around 12 cents a kWh including all the taxes and fees for electricity.

 

[RYoungberg]

Not sure how to run the numbers but here is what I got.

Last electric bill including all the fees and charges of $111 for 522 kWh usage = 21 cents a kW
2013 with 9 bars which I understand has a 24 kWh battery

So if the range is down to say 17 miles or 25% of the 70 mile range, it will use 75% of 24 kWh's or 18 kWh to fill up.

18 kWh x 21 cents = $3.78 for 53 miles.

That's about 7 cents a mile.

Does that sound accurate or am I missing something as that doesn't seem all that impressive compared to gas cars.

My Jetta gets 40 mpg overall on $3.30 gas which comes to 8 cents a mile.

Zero, as I have Net Metering on my solar PV system. I produce electricity for the grid during sunny days, get 22 cents/kWh credit, and then charge the EV at night when I get charged 11 cents/kWh.
Although on a recent road trip I had to recharge at a public charger in Wyoming and it cost 80 cents/kWh!!! At 4 miles/kWh (mostly down hill) that's 20 cents/mile.
Renting an Uber may have been cheaper...

 

[nlspace]

So if the range is down to say 17 miles or 25% of the 70 mile range, it will use 75% of 24 kWh's or 18 kWh to fill up.

Huh? You got some messed up math--where did you get the 75% to fill up?

if you only have 25% of the range, then you only have 25% of the capacity, so .25 times 24kWh is 6 kWh to fill up.

So 6 x 21 cents/kWh is $1.26 to fill up for 17 miles.

 

[GentleGiant]

Not sure how to run the numbers but here is what I got.

Last electric bill including all the fees and charges of $111 for 522 kWh usage = 21 cents a kW
2013 with 9 bars which I understand has a 24 kWh battery

So if the range is down to say 17 miles or 25% of the 70 mile range, it will use 75% of 24 kWh's or 18 kWh to fill up.

18 kWh x 21 cents = $3.78 for 53 miles.

That's about 7 cents a mile.

Does that sound accurate or am I missing something as that doesn't seem all that impressive compared to gas cars.

My Jetta gets 40 mpg overall on $3.30 gas which comes to 8 cents a mile.

I think your math is wrong, you dont run the car down to 0%, yet your energy use calc is based on exactly that.

My Soul has 26.1KWh of battery left, and depending on weather and heater use, I get between 60 and 80 miles from an 80% charge; I pay £0.08 per KW (EV specific tariff between 01:30 and 06:30am); since I usually charge when the battery drops to 20%, I am charging 60% of 26.1KW, or 15.66KW, or £1.25.

£1.25 / 40 miles (worst case) = £0.03 per mile.

 

[atikovi]

So 6 x 21 cents/kWh is $1.26 to fill up for 17 miles.

I'm filling up (recharging) to 70 miles range from 17 miles range. I'm adding 53 miles, not 17.

 

[atikovi]

I think your math is wrong, you dont run the car down to 0%, yet your energy use calc is based on exactly that.

Of course not, and I said its at 17 miles range or about 25% full.

 

[GentleGiant]

Of course not, and I said its at 17 miles range or about 25% full.

Sorry, 9 bars of 11 means you dont have a 24KWh of capacity remaining; I was working on you counting the remaining charge, rather than forgetting you arent charging to 24KWh.

Either way, you are wrong.

BTW, I am not up on what each bar on the display means in % of battery capacity, but I would guess, best case, you have somewhere in the 80% range.

85% = 20.4KWh
25% - 5.1KWh

So you are talking 15.3KWh, assuming you are charging to 100% (bad idea in any early generation EV).

There are also losses to account for, slower ac charging has increased losses compared to higher current ac charging; if you are using a granny lead charger, that can make a significant different over a 7KW home charger.

And I quote "Our long-term 2019 Tesla Model 3 Long Range Dual Motor test car is currently averaging 95 percent efficiency from a Level 2 Tesla 240-volt wall connector. Staffers charging at home using a typical 120-volt wall outlet saw efficiency of, at best, 85 percent, and it dropped to as little as 60 percent in very cold weather, when charging the battery requires expending significant energy to keep it warm."

So that is a range from 5% to 15% loss just based on voltage used, and not even on the current flow; granny chargers are even worse.

In addition, are you are assuming 17 miles = 25% or is that what the battery indicator is saying is 25% ? You cannot trust the range indicator, it is called the "Guess-O-Meter" (GOM) for a reason.

 

[John Trindle]

I think part of the issue is assuming you use 18KWh in 75% of your range. This isn't true when you get the car, and is less true at 9 bars. I think you will find it is closer to 13.1 kWh. At 9 bars your SoH is at most 79% or so.

A more direct route might be to use the Miles / KWh, so at 3.7 mi/KWh it's about 5.7 cents per mile at 21 cents per KWh.


I pay 14.2 cents per KWh and do around-town driving so average 5 mi/KWh (when not using heat) In those admittedly ideal conditions I pay about 2.8 cents per mile.

 

[atikovi]

Let me simplify then. How much does it cost me to charge the car that is showing 17 miles range, to full when it then shows 70 miles range, with the details and rates mentioned?

 

[Wrench7747]

Let me simplify then. How much does it cost me to charge the car that is showing 17 miles range, to full when it then shows 70 miles range, with the details and rates mentioned?

What does your Leaf energy dashboard say, for miles per kWh?

If it says for example 4.1 miles per kWh, then 53 mi / 4.1 * 0.21 = $2.71, or 5 cents per mile.

 

[GentleGiant]

Let me simplify then. How much does it cost me to charge the car that is showing 17 miles range, to full when it then shows 70 miles range, with the details and rates mentioned?

That is actually impossible to answer precisely - same as it would be for an ICE car; as everyone is has a different driving style, drives at different speeds on different roads and under different, varying weather conditions.

Yes, ICE car range also varies with temperature, but no EV hater ever mentions that.

 

[atikovi]

What does your Leaf energy dashboard say, for miles per kWh?

If it says for example 4.1 miles per kWh, then 53 mi / 4.1 * 0.21 = $2.71, or 5 cents per mile.

 

[John Trindle]

Let me simplify then. How much does it cost me to charge the car that is showing 17 miles range, to full when it then shows 70 miles range, with the details and rates mentioned?

I based my calculations on your info in the original post (which I assumed accurate) except for the battery degradation. Your math was fine, but at about 3.7 Mi/KWh it suggests you are doing a lot of highway miles... which is NOT consistent with the 5.8 mi/KWh in your latest picture. That would be a great average around town 35 mph or less.

If it is 3.7 mi/KWh it would be $3.00 to go 53 miles at 5.7 cents a mile, if 5.8 mi/KWh then it's closer to $1.92 and 3.6 cents per mile.

 

[Burt]

Zero, as I have Net Metering on my solar PV system. I produce electricity for the grid during sunny days, get 22 cents/kWh credit, and then charge the EV at night when I get charged 11 cents/kWh.
Although on a recent road trip I had to recharge at a public charger in Wyoming and it cost 80 cents/kWh!!! At 4 miles/kWh (mostly down hill) that's 20 cents/mile.
Renting an Uber may have been cheaper...

Wrong on two counts. first he asked how much does it cost him, not you.

As far as your cost, it isn’t zero, it’s the thousands of dollars you spent on solar installation. I’m sure if you paid thousands of dollars to the utility company they’d give you “free” electricity too.

But whatever makes you happy.

 

[Wrench7747]

View attachment 5783

5.8 m/kWh is great.

That is 3.6 cents per mile. So under half the cost per mile of your Jetta. (Not including the savings on oil changes and other ICE maintenance.)

53 mi / 5.8 * $0.21 = $1.92

 

[marshallinwash]

Wrong on two counts. first he asked how much does it cost him, not you.

As far as your cost, it isn’t zero, it’s the thousands of dollars you spent on solar installation. I’m sure if you paid thousands of dollars to the utility company they’d give you “free” electricity too.

But whatever makes you happy.

Well he is implying that there is little savings in general driving an electric car based on his experience. When in fact it depends on where you live, electrical rates, gas cost per gallon, and how and where you drive.