Electric vans

[flameport]

how can these people not know how much electricity they are using?

If they are charging using a granny lead, there is no way of knowing.

However anyone with ain installed EVSE will know as all of them report this and other information via the app.

 

[StephenStephen]

If they are charging using a granny lead, there is no way of knowing.

However anyone with ain installed EVSE will know as all of them report this and other information via the app.

I'm impressed at the impressive suggestion of such sheer wilful ignorance: "there is no way of knowing"
In this home, as in many others, the car is charged by a granny lead on most nights, and I'd be hard pressed to avoid knowing how much electricity is used to charge the car.

 

[Munroast]

I'm impressed at the impressive suggestion of such sheer wilful ignorance: "there is no way of knowing"
In this home, as in many others, the car is charged by a granny lead on most nights, and I'd be hard pressed to avoid knowing how much electricity is used to charge the car.

so how many miles per kWh do you get based upon the consumption from the grid

I only know as I installed a meter between 3 point plug and the charger (I doubt many people have done that), without that the consumption would be muddled between home use and EV use

I only know 3 other people with EVs well enough to know what they are doing regarding charging, two have 6kw charges with no means of knowing how much leccy goes to car, and another person seems happy to charge his car from a 3 point plug with the power draining his solar batteries - lol

@flameport - be interesting to know what these apps report, probably misleading nonsense like many apps do.
my solar system (Growatt) that tells me of wondrous amounts of solar energy that I am producing - of course its relatively meaningless, it measures the power leaving the solar panels, conveniently ignores the massive losses as the inverter converts this DC to grid useful AC, let alone what is lost in the solar batteries


life has never been a greater con than it is today

 

[Munroast]

No, that only applies to the indicated speed, the speedometer. There is no standard I am aware of, for the odometer accuracy. I have access three speedometers in my car - The default analogue dash, a digital version which is direct reading, and the satnav. The analogue dash reading is deliberately configured in the software which runs it, to read around 5% high. The other two are accurate. Likewise the odometer is accurate.

I also find the fuel range accurate, but it constantly revises itself, dependent on driving style, and the terrain. It bases the calculation, on knowing fast it is pumping the fuel/injector timings, versus distance covered. If I could be bothered - I have access to the software, which allows me to more precisely calibrate the calculation.

the odometer is based on how many times the wheels go round, tyres of the same spec vary from batch to batch, so unless your mileometer is recalibrated at every tyre change, and periodically recalibrated as the tyres wear down - then it is not accurate, the worst van i had was a maestro, its milage ws out by 12.5% the best was my wifes E300TD only 3.4% out

here is a picure of some tyres that I compared, they were all the same spec, 195 65 R13 (if I remember correctly)
~ 5% diff

 

[Harry Bloomfield]

here is a picure of some tyres that I compared, they were all the same spec, 195 65 R13 (if I remember correctly)
~ 5% diff

I once did a bit of research on the subject, and what I found was there was very little variation, because the important figure, is the 'rolling diameter', rather than the measured diameter of the tyre.

 

[Munroast]

I once did a bit of research on the subject, and what I found was there was very little variation, because the important figure, is the 'rolling diameter', rather than the measured diameter of the tyre.

yes at high speeds the tyres rolling diameter will increase a little (so indicated speed may not rise as fast as actual speed) small percentage change

but diameter is all important and a bigger diameter will make speed and distance appear to be less on mileometers and speedometers that rely on how many times the heel spins

and it is all a very linear equation circumference =pi * dia
and being linear a 5% increase in radius will mean a 5% increase in circumference

 

[Avocet]

exactly, and EV owners are being hoodwinked into thinking their EVs are far more efficient than they actually are.

from what I understand from others who have EVs and charge at home - they have no knowledge or no way of knowing how much electricity they are using, all they have is the misleading numbers presented on the dashboard.

least with an ICE vehicle you have a very simple mechanism in determining exactly how many mpg you are getting (which is often quite a bit more than the cars computer will have presented)

You could always go back to getting rinsed for diesel, if it's a real problem for you...?

 

[Avocet]

I'm intrigued - how can these people not know how much electricity they are using?

It's kind of oddly impressive to have aquaintances with such an unusually distant relationship with reality - perhaps it is an emerging niche form of non-attachment to reality meditation practice?

I guess it can be quite hard to separate out exactly what's being used by the rest of the house and what's being used by the charger? The "app" that came with my car, tells me I've used 103 kWh so far this month, but I've no idea whether that's electricity that enters the onboard charger or whether that's electricity that's been usefully stowed in the battery. There's also no easy way of accurately knowing how much I had in the battery at a minute past midnight on the morning of the 1st of May, compared to how much is in it now. I could check the latter, I guess, but can't be fagged working out whether I'm paying 2p a mile in fuel or 2.1p or even 2.2p, because life's too short! Even then, for all I know, my "app" is in on the conspiracy anyway...

 

[Avocet]

If they are charging using a granny lead, there is no way of knowing.

However anyone with ain installed EVSE will know as all of them report this and other information via the app.

Yes... but are they telling the truth...?

 

[Avocet]

the odometer is based on how many times the wheels go round, tyres of the same spec vary from batch to batch, so unless your mileometer is recalibrated at every tyre change, and periodically recalibrated as the tyres wear down - then it is not accurate, the worst van i had was a maestro, its milage ws out by 12.5% the best was my wifes E300TD only 3.4% out

here is a picure of some tyres that I compared, they were all the same spec, 195 65 R13 (if I remember correctly)
~ 5% diff

View attachment 413778

But what were you checking the mileage against?

 

[Harry Bloomfield]

but diameter is all important and a bigger diameter will make speed and distance appear to be less on mileometers and speedometers that rely on how many times the heel spins

and it is all a very linear equation circumference =pi * dia
and being linear a 5% increase in radius will mean a 5% increase in circumference

No, the 'rolling diameter', is quite different to the measured radius. If the radius didn't deform, the tyre would have a tiny contact patch, with the road.