Electric car energy measurements.

[Vir Campestris]

I just fill the thing up.

By the time I've got home I've done the mental arithmetic to work out the MPG on the tank I just used.

Andy

[Tim Streater]

I use a spreadsheet to do that, to compute that over the last 5 tankfuls, and since new. It then charts it, too.

[David Paste]

I meant the battery capacity rather than the motor power output.

But about 277 MJ/h (77 kW engine)

[David Paste]

Welcome to the internet

[David Paste]

Imperial or US? My mate in the great frozen north of Canada reports his consumption in litres per 100 km. Utter madness.

[David Paste]

You must drive like a worried nun or possibly a WRC driver. I'm not sure.

[David Paste]

This is a good point, thank you.

Yes, unreasonable.

[Martin Brown]

kWh is one of the conventional units of mains electricity pricing. I have a smart meter (joy) and saw kWh prices go up 50% the other week!

I am now looking at ways to further cut down on electricity use. Super insulating the hot water tank is next on the job list.

Mine does about 12 miles/L driven hard and 16 miles/L cruising. Horrible hybrid unit but the numeric values are quite nice.

[David Paste]

This is actually something that puzzled me a few years ago, just before I had an aneurysm.

[David Paste]

I would like to offer you a job as my cake manufacturer.

[williamwright]

I fill it up when it's getting empty, and pay whatever it costs. It's no good me bothering about what mpg I'm getting. I've got to get about.

Bill

[williamwright]

Fuck off with your sarcasm you clever sod. It was a typo. I'm well aware of apostrophe rules. What possible honourable motive can there be for correcting people's slips?

Bill

[Richard]

Its its source of its jollies?

Collection of apostrophes to insert wherever its necessary:

''''''''

(Its ok to not use them all)

[Chris Hogg]

Yebbut MPH is not constant - depends on the speed. So use standard charging conditions.

[Paul]

There are no standards in charging.

The whole thing is wavey-gravy :-)

There have been some cars with a more constant charging behavior, until they hit top-up level. The Ionic 5 for example, has a pretty steady charging process at low state of charge. One of the early non-Tesla BEVs was like that too. Not particularly high power charging, but steady.

And you can't even tell from the CC bill at the end of the month, how much "fuel" you bought. Because you pay by the hour, at a roadside charger. Only your home-charging-rig comes close to rationality (it's not pay-by-the-hour, it's pay by the kWh). If you're charging at one of the lowest standards, the charging current might be whatever the charger can manage, versus what the car can absorb.

The Taycan enjoys the reputation of *connecting* to a 350kW charger. Yet it never draws 350kW. Which I consider to be quite funny, when it comes to bragging rights. The most it will draw is around 275kW or so.

In BEVs, there are no physics majors. Only Business Admin graduates and rent-seeking behavior :-) That's why in the end, you haven't a clue what you're buying with your money. Or without looking at the console, how much juice is going into the buggy, this second.

You can plug a Tesla into a SuperCharger, and if it does the maths and finds you've done too much SuperCharging, it will drop the charging rate to a lower standard. If you're doing this at the roadside, you immediately stop the charge operation, drive off the SuperCharger pad and drive onto one of the lower rate pads. If you're being charged by the hour, and the stupid car will not operate at high rate, then only a fool would stay on that pad. I hope there's an indicator on the Console that says "Did you know you're being screwed ???".

I'm sure after a few Credit Card bills, you'll get the hang of this.

That's why I expect there will be a booming market in "power pak trailers" one day, with people hauling extra electrons around, so they don't have to buy them on the side of the road.

Paul

[Tim Streater]

Thst's the spirit, Bill :-)

[Tim+]

I can?t claim much experience with public chargers but all the tariffs I?ve seen are per kWhr with a connection charge and sometimes a penalty overstay charge. I?ve never seen a simple ?by the hour? charge.

Tim

[John Rumm]

You just need to move to another planet :-)

[Paul]

"Electrify America charges 15 to 25 cents per minute ? <=== ??? No idea what a maximum of 30 cents per kWh, GreenCarJournal reports. this means

Using a DC fast-charging station can cost up to 99 cents per minute, so it?s definitely a lesser value."

@15:00? The Cost of public charging

A factor of 3x, between one charge company and another.

It's possible the tarriffs are different, depending where you are in the world.

I've just never got the impression here, that roadside chargers "work like a utility". Not like buying a kWh at home.

Paul

[The Natural Philosopher]

I just read the figure off the odometer and reset it before pulling away at the pump.