Equation to work out charge costs?

Shefwedfan

Ok, this has probably been asked but I am wondering what is quickest way to work out how much it costs to charge car?

It was a question my mother asked in relation to her 24kW Leaf. She plugs in and charges sometime during the day so I was just wondering is their a quick way to work out?

So say you are paying 0.14 cent per unit, how much would it cost to fully charge a 24kW Leaf?

Sorry this probably has been answered 100 times

Casati

Shefwedfan wrote: »

Ok, this has probably been asked but I am wondering what is quickest way to work out how much it costs to charge car?

It was a question my mother asked in relation to her 24kW Leaf. She plugs in and charges sometime during the day so I was just wondering is their a quick way to work out?

So say you are paying 0.14 cent per unit, how much would it cost to fully charge a 24kW Leaf?

Sorry this probably has been answered 100 times

Is it not as simple as 24 units per charge from empty to full?

Water John

It's not that far off. About 10% loss I think.

n97 mini

24 x .14, roughly. That's 0% to 100%. If it's 20% when plugged in and charges to 80% then it's roughly 60% of 24 x .14.

goz83

n97 mini wrote: »

24 x .14, roughly. That's 0% to 100%. If it's 20% when plugged in and charges to 80% then it's roughly 60% of 24 x .14.

Firstly, the full 24kWh is not available. It's about 22kWh. Secondly, you need to consider charging loss of ~10%. Finally (not always applicable) you need to consider how much is day and how much is night rate.

A typical top up of ~10kWh would have been closer to 11kWh drawn, so 11x0.14= €1.54

Water John

Yeah, night rate is the best at halving the bill.
This is, do as I say, not as what I have done.

KCross

goz83 wrote: »

Firstly, the full 24kWh is not available. It's about 22kWh. Secondly, you need to consider charging loss of ~10%. Finally (not always applicable) you need to consider how much is day and how much is night rate.

A typical top up of ~10kWh would have been closer to 11kWh drawn, so 11x0.14= €1.54

^^ This.

And 22kWh would be for a new Leaf. It could easily be down to 20, 21kWh if a few years old.

Shefwedfan

Ok so 1 unit is 1 kW?

Calahonda52

Shefwedfan wrote: »

Ok so 1 unit is 1 kW?

1 unit is 1 kWh, which is the unit of billing: 18 day 7 night or similar

For info: I ran out on Friday night, 0.5km from destination, .
Full charge was 32.7 kWh on my socket meter for payment to where I stayed

Shefwedfan

Ok, so from I know(need to confirm)...I can access 24.2kw of the 26.5kW

My rate at the moment is:
0.1596 day rate
0.0765 night rate

So to charge from empty costs:
€3.86
€1.85

These numbers are without the 10% loss. But if I want to get a quick view I can look at those numbers.

n97 mini

goz83 wrote: »

Firstly, the full 24kWh is not available. It's about 22kWh. Secondly, you need to consider charging loss of ~10%.

I did. Ironically 10% of 22kw is 2.2kw, and 22kw+2.2kw = about 24kw.

Shefwedfan

I am impressed with Car Net website. Went to have a look and I can pull the full information since I bought the car.

So I have used 2525kw since 28th March. That is for 14,830km. I think the average is 17kWh/100km

So the fuel cost is €193 euro based on night time charging which I do 99% of the time

If I had A6 I was getting average of 800 km per fill. A fill cost 90 euro. So to drive same distance would have cost €1,620

These numbers are rounded so not exact

Casati

Shefwedfan wrote: »

I am impressed with Car Net website. Went to have a look and I can pull the full information since I bought the car.

So I have used 2525kw since 28th March. That is for 14,830km. I think the average is 17kWh/100km

So the fuel cost is €193 euro based on night time charging which I do 99% of the time

If I had A6 I was getting average of 800 km per fill. A fill cost 90 euro. So to drive same distance would have cost €1,620

These numbers are rounded so not exact

Presume that A6 was petrol? Would comparing to a new Golf TDI that returns 5.6 l per 100km be a fairer comparison? Such a car would use 5.6*14830/100 = 830 liters @ 1.26 = €1036

Shefwedfan

Casati wrote: »

Presume that A6 was petrol? Would comparing to a new Golf TDI that returns 5.6 l per 100km be a fairer comparison? Such a car would use 5.6*14830/100 = 830 liters @ 1.26 = €1036

No 2ltr diesel. It would average 5ltr/100km or less on the motorway. The issue is most of my driving is Dublin city so some days I could get 14ltr/100km:mad:

I was commuting for a while so had a 200km round trip on motorway, A6 was a joy and was perfect for that.....not for 60km city driving round trip to work, that is why I swapped to electric

Also, I very much doubt any diesel engine gets 5.6ltr/100km in Dublin city.....

Casati

Shefwedfan wrote: »

No 2ltr diesel. It would average 5ltr/100km or less on the motorway. The issue is most of my driving is Dublin city so some days I could get 14ltr/100km:mad:

I was commuting for a while so had a 200km round trip on motorway, A6 was a joy and was perfect for that.....not for 60km city driving round trip to work, that is why I swapped to electric

Also, I very much doubt any diesel engine gets 5.6ltr/100km in Dublin city.....

Yeah was seeing on another forum some lad was getting 22 l per 100km in a 1.0 TSI in Dublin traffic so I agree for that driving EV is super

Shefwedfan

Casati wrote: »

Presume that A6 was petrol? Would comparing to a new Golf TDI that returns 5.6 l per 100km be a fairer comparison? Such a car would use 5.6*14830/100 = 830 liters @ 1.26 = €1036

So the Galaxy is doing 8-9ltr/100km

So take that 8*14830/100 = 1196ltr @ 1.26 = €1,494

I wasn't that far out to be honest and to be honest that is been very nice to the diesel engine

goz83

n97 mini wrote: »

I did. Ironically 10% of 22kw is 2.2kw, and 22kw+2.2kw = about 24kw.

I hadn’t missed the irony. I just wanted to make it clearer for anyone who didn’t realise that the full battery is not made availabke for use.

unkel

Shefwedfan wrote: »

some days I could get 14ltr/100km:mad:

Some days? I averaged about 14l/100km for a decade

+ max motor tax on top of that...

Gumbo

Casati wrote: »

Presume that A6 was petrol? Would comparing to a new Golf TDI that returns 5.6 l per 100km be a fairer comparison? Such a car would use 5.6*14830/100 = 830 liters @ 1.26 = €1036

Is that 5.6 L/100km the manufacturers figure or actual real world figures?

As the ICE mpg figures are ideal situations just as the range figures for EV’s.

Casati

kceire wrote: »

Is that 5.6 L/100km the manufacturers figure or actual real world figures?

As the ICE mpg figures are ideal situations just as the range figures for EV’s.

Real world mixed driving, but not gridlock Dublin driving exclusively. Manufacturers figures are in the low 4’s per 100km

Shefwedfan

kceire wrote: »

Is that 5.6 L/100km the manufacturers figure or actual real world figures?

As the ICE mpg figures are ideal situations just as the range figures for EV’s.

Most of the high l/100km numbers you will find is someone reading from a book. In real life you will never get them....never mind in the city but even on a motorway.

If you want to see crazy numbes just read some of the bulls**t posted on a daily basis in the main motor forums.....people swearing blind it is true and they get it in their magical car.....I still to this day do not understand why people bother!!!

BoatMad

Shefwedfan wrote: »

Most of the high l/100km numbers you will find is someone reading from a book. In real life you will never get them....never mind in the city but even on a motorway.

If you want to see crazy numbes just read some of the bulls**t posted on a daily basis in the main motor forums.....people swearing blind it is true and they get it in their magical car.....I still to this day do not understand why people bother!!!

absolutely , the NEDC test that throws out these consumption figures is a very quirky test and the cars are optimised for it

draiochtanois

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Gumbo

draiochtanois wrote: »

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Even using that site, my missus averages 25 MPG in her 2008 520d in 90% city driving.

draiochtanois

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unkel

Sounds about right to me. City driving is not really suitable for diesels and in a 5-series BMW with a petrol engine you would barely see 20MPG

draiochtanois

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unkel

draiochtanois wrote: »

This post has been deleted.

I'm quite sure none of those would be 90% driving in Dublin city at peak traffic times

I used to commute into the city a very long time ago in V8 petrol engines. Took on average almost 3 hours a day to do less than 30km and I averaged not much more than 10MPG on my commute.

But of course there could be a problem with the car, I'm not saying your suggestion is invalid.

unkel

unkel wrote: »

I'm quite sure none of those would be 90% driving in Dublin city at peak traffic times

I used to commute into the city a very long time ago in V8 petrol engines. Took on average almost 3 hours a day to do less than 30km and I averaged not much more than 10MPG on my commute.

But of course there could be a problem with the car, I'm not saying your suggestion is invalid.

Hah, the average speeds are not great in Dublin alright. OT: I pedelec to Dublin 42 km return a day and the riding time is 40-46 min per direction depending on the traffic, direction and the wind. Charged at the night rate it costs me approx. 10 c per 100 km. Interestingly the tyres cost about € 1-2 per 100 km, which is very close to the cost of the car tyres per kilometre.