EV charging costs and calculation - Real world example. Check my figures?

DrEskimo

Bachelorplace said:

DrEskimo said:

Nope seems right. Added about 32kWh from the charge, and are getting about 3.5miles/kWh right?

So the charger must have been around £0.69/kWh, which of course is expensive.
If all you are every doing is using these high cost rapid chargers, then yes about as expensive as fuel, but even when I didn't have home charging I used a slower and cheaper AC charging when I could leave the car for long periods. Was around £0.18/kWh when I did this for a couple of years.

It does show the growing disparity in costs between those that can charge at home, and those that cant, and it's a real problem. I commuted ~75miles today and used about 23kWh of energy. Charging last night cost me £1.17.

Not bad Esko - 50p 
27p in Brighton
50p Swindon
48p Cirencester
Home - who knows!

I also note the disparity of what "range" means. 

I forgot to mention that the Mach E - shows you 14% use for Aircon 7% for Screen and so on etc etc. This would also mean that if you had say a Tesla which has a decent sound system and an AMP or an IPace which draws more digital power for the interior light pack etc, then this might explain why Telsa's have nothing else in them. 

Much of the driving was on warm days... so at first I was amazed with the usage in relation to what it says it might use. 

But yes that 70mph or any hard acceleration.... at 7c late at night is a shocker. 

Sorry I'm a bit confused about the actual journey...is this multiple journeys on different days, or just one long journey over a day?

When you were at 28%, how may miles were you from home?

Or do you not have home charging?

Bachelorplace

Needed to be charged to min 70% before being collected next day, that was all.
Correct no home charging. 

Bachelorplace

Across a weeks use.

DrEskimo

I'm not sure why you don't you think it would be suitable even with home charging then?

You wouldn't have needed to use any public charging and would have had it 100% each morning, including the day it was collected.

Here's how much it costs me each evening (the hour at 14:00 was to take advantage of a free 'power hour' offer I get from Octopus):

Petriix

Bachelorplace said:

I will add an element of context.

I also spent £13 on a burger and fries...at a venue I would not normally go to. In an ice, or with a much faster charger....!?

So that charge actually cost £22 plus £13 really. 

 a. Because I was tired b. Because I was stressed c. Because I was cold and wanted to go home. d. Because I wasn't going to sit in a cold car like a lemon for 57 minutes. 

My mum is not well and I was back and forth to hospital. EV in this instance even with home charging is properly useless, I am sorry to say. 

Most of us would run the heating in our EVs on the rare occasions when we have to charge while we don't have anything better to do. In reality, you might have been better just plugging in on the 3 pin 'granny charger' overnight when you got home.

I'm struggling to understand why an EV with 250 miles of real world range is 'properly useless'. With home charging you'd be setting off with your full range every day.

Petriix

iwb100 said:

Petriix said:

There are solutions for terraced houses. My local council is operating a permit scheme (with baked in insurance) to allow people to safely trail cables over the pavement. Other areas are installing cable gullies.

Cables from where? Where are the charging ports? Most of these houses have looped service. So where are they charging from?

Any 3 pin socket, or even a dedicated EVSE on the wall. The DNO will 'unloop' any looped supply without charge where there is a genuine reason (like EV charging).

Thrugelmir

DrEskimo said:

iwb100 said:

DrEskimo said:

Nope seems right. Added about 32kWh from the charge, and are getting about 3.5miles/kWh right?

So the charger must have been around £0.69/kWh, which of course is expensive.
If all you are every doing is using these high cost rapid chargers, then yes about as expensive as fuel, but even when I didn't have home charging I used a slower and cheaper AC charging when I could leave the car for long periods. Was around £0.18/kWh when I did this for a couple of years.

It does show the growing disparity in costs between those that can charge at home, and those that cant, and it's a real problem. I commuted ~75miles today and used about 23kWh of energy. Charging last night cost me £1.17.

Genuine question. Round me the majority of people live in terraced houses with no drive and no parking other than on road. Many are along main roads. They all have cars. Can someone explain when the only option is EVs what are such residents supposed to be doing? How do they home charge? Or do half the population need to be charging elsewhere? 

Right now there is about one charging point for every 10 full EVs. And even now there are reports of sometimes queuing and waiting and problems. People with EVs say it’s getting more difficult.

But let’s say that we have to suffer with just the 1:10 ratio that might be sub optimal but still in this country everything is sub optimal.

That means that even if we reduce cars on the roads by ten percent, that means we need something in the realm of 320,000 charging points. 

And that is based on the current situation where demand is mitigated as only people with drives or charging points at home are buying EVs. So the numbers I have here are not even going to come close to working.

Let’s say conservatively we’d need over half a million charging points. Where are they all going to go? 

 Getting the rest of the infrastructure to that level would do a lot to improve the situation.

There's the challenge. Care to put an estimate on the spend required and the physical infrastructure that's required. As we are merely scratching the surface of cheap wins currently. Very easy to be an alright Jack. 

iwb100

Petriix said:

iwb100 said:

Petriix said:

There are solutions for terraced houses. My local council is operating a permit scheme (with baked in insurance) to allow people to safely trail cables over the pavement. Other areas are installing cable gullies.

Cables from where? Where are the charging ports? Most of these houses have looped service. So where are they charging from?

Any 3 pin socket, or even a dedicated EVSE on the wall. The DNO will 'unloop' any looped supply without charge where there is a genuine reason (like EV charging).

All of this is fine now but I’m talking about rows of hundreds of terraced houses all looped and on the main road. How is the cost of sorting that for EVs going to be borne? I don’t have any doubt we need to all be in EVs but the problem as ever is the government seem oblivious to the massive infrastructural challenge this presents and aren’t doing anything about it when they really should be. Same goes for heating homes. Huge challenges and we have a target of 2030 for both yet the massive infrastructure projects required that should have started years ago are still nowhere to be seen.

DrEskimo

Thrugelmir said:

DrEskimo said:

iwb100 said:

DrEskimo said:

Nope seems right. Added about 32kWh from the charge, and are getting about 3.5miles/kWh right?

So the charger must have been around £0.69/kWh, which of course is expensive.
If all you are every doing is using these high cost rapid chargers, then yes about as expensive as fuel, but even when I didn't have home charging I used a slower and cheaper AC charging when I could leave the car for long periods. Was around £0.18/kWh when I did this for a couple of years.

It does show the growing disparity in costs between those that can charge at home, and those that cant, and it's a real problem. I commuted ~75miles today and used about 23kWh of energy. Charging last night cost me £1.17.

Genuine question. Round me the majority of people live in terraced houses with no drive and no parking other than on road. Many are along main roads. They all have cars. Can someone explain when the only option is EVs what are such residents supposed to be doing? How do they home charge? Or do half the population need to be charging elsewhere? 

Right now there is about one charging point for every 10 full EVs. And even now there are reports of sometimes queuing and waiting and problems. People with EVs say it’s getting more difficult.

But let’s say that we have to suffer with just the 1:10 ratio that might be sub optimal but still in this country everything is sub optimal.

That means that even if we reduce cars on the roads by ten percent, that means we need something in the realm of 320,000 charging points. 

And that is based on the current situation where demand is mitigated as only people with drives or charging points at home are buying EVs. So the numbers I have here are not even going to come close to working.

Let’s say conservatively we’d need over half a million charging points. Where are they all going to go? 

 Getting the rest of the infrastructure to that level would do a lot to improve the situation.

There's the challenge. Care to put an estimate on the spend required and the physical infrastructure that's required. As we are merely scratching the surface of cheap wins currently. Very easy to be an alright Jack. 

No, as it would be an uneducated and ill informed guess.

I bought a used EV, I didn't apply to be secretary of state for transport....

Bachelorplace

DrEskimo said:

I'm not sure why you don't you think it would be suitable even with home charging then?

You wouldn't have needed to use any public charging and would have had it 100% each morning, including the day it was collected.

Here's how much it costs me each evening (the hour at 14:00 was to take advantage of a free 'power hour' offer I get from Octopus):

THAT Is amazing... how do I get one of these separate car only tariffs... does it take a feed from the mains box and split off the usage?

If I knew how much I was spending that would be amazing. 

That said... what charger have you got? this looks like a 7?

Doesn't matter so much how many miles one is going either. 

Does your car automatically do the stop at 80% thing?