EV CHARGING AND FUSE

[AndyPRK]

I have nothing against electric cars, I own one.
But all jokes aside, there are three things wrong with the top car,

The brand

The model

The colour.

And, as has been said, none of those prices are a give-away.

Fair point.

Just the first example I found.

Why build them in that colour though, if they won’t sell. Seamed to be lots of them.

 

[morqthana]

I'm sure they do a great deal of research, customer focus groups, etc, before investing in a colour, as it isn't cheap, particularly if you get it wrong.

OOI, are there others in other colours? Are the beige ones really over-represented?

Are they all with the same, or same few, sellers?

 

[AndyPRK]

Seamed to be registered in the same region and that colour only.

I wasn’t specifically looking at fiats though. And didn’t have a detailed look

 

[securespark]

There are certainly some colours that are more popular than others and some cars look much better in one colour than another.
My personal hates are the tangerine colour the "new" Mini is painted in, Hyundai yellow (any yellow, really), any shade of pink, green, brown, or maroon.

I'm going to be really controversial next. I've always hated white because it shows the dirt so easily. And, in days gone by, the rust!

Black too I'm not fond of.
It does not show up well on the road.

Greys are OK as long as they are not too dark.
Excepting that awful battleship grey that seems to be becoming more and more popular. I think Porsche do a version, and VAG.
I think it's dreadful!

 

[Risteard]

Really?
2400 joules per second per hour?

And Rirstead is wrong too.
Come on, this O Level physics fgs!

I'm not wrong. If it is drawing that continuously for an hour, then in an hour it will have consumed that many kWh.

 

[robinbanks]

And why do ev guzzle so much power?

They don't. They only take about as much power to move as petrol cars.. it's just that you don't really have any concept of how much energy petrol contains

So we look at 3.6 miles/kWh and 4.8 miles/kWh, and we don't have a clue what in real terms it means

You don't know what you pay for a kilowatt hour? Most people do

I pay 36p/kWh say. My ev does 3.6 miles per kWh say. My ev costs me 10p per mile

My petrol car does 33 miles per gallon, say. A gallon of fuel costs £6.60 say. My petrol car costs me 20p per mile

Real terms; the dent in your pocket

kWh are like litres. kW are like fuel pipe diameter. A 7 kW charger can pour 7 kWh of "volume" of fuel into your car every hour. Your car has a 70kWh battery. If it was at 0 percent it would take at least 10 hours to fill up using a charger that can pour 7kW every hour.

The start and end of charging goes slower, most people that want to get the most out of their battery keep the charge level between 20 and 80 percent.

You don't recharge a battery car like you refuel a petrol car (ie deplete it then take it to a special place to refill it completely). You refuel it any time it's parked near a charger you're willing to pay for, and most battery cars spend more time parked near a charger than they do being driven just by virtue of the natural car use pattern of the human owner

The mental leap is key, but you've already made it with your smart phone which you charge every night when you're not using it

Also If I buy an ev what options do I have to charge it for example can I charge it outside or in my house?

It would be unusual to bring your EV into your house to charge it. If you're thinking it has some kind of removable battery you can plop on the kitchen table and plug into a socket, that would be a no; the batteries in a BEV are huge, more than half the car's weight. You don't move them, you park the car near the outlet attached to your house and run a cable. Some marques are experimenting with wireless charging but it's not commercially available yet

It would be kWh in an hour - NOT kW.

kWh per hour is kW

Per means divide

kWh/h means the h on the top and the h on the bottom cancel out (disappear)

kWh/h = kW

-

It's like mph per hour, also written as m/h. If I drive 60mph for (means multiply) 10 hours that's

60m/h x 10h

Also written as

60m x 10h
----------
h


There is an h on the bottom and an h on the top, they cancel out leaving 60m x 10

600 miles

The other option for charging away from home is DC rapid charging, found at motorway services and similar. These will typically charge at least 20x faster than the home options

But worth noting that the car has to be able to take it. Not all cars can accept a charge that fast. The manufacturer will usually be quite clear about how fast the car can charge on various charger types

 

[ericmark]

It would be unusual to bring your EV into your house to charge it. If you're thinking it has some kind of removable battery you can plop on the kitchen table and plug into a socket, that would be a no; the batteries in a BEV are huge, more than half the car's weight. You don't move them, you park the car near the charger bolted to your house and run a cable. Some marques are experimenting with wireless charging but it's not commercially available yet

All three of my electric vehicles are charged in the house at the moment, the mobility scooter batteries are out of their cases to have a new overload fitted, it would be normally charged in the shed, the wife's e-bike is in the bath, and mine by the door, both charged in the house, and unless solar panels fitted there in no good reason not to garage a car. And in a garage, the equal potential zone will remove some of the problems associated with loss of PEN.

With my petrol and diesel cars in the main, I will park them on my drives, but if I intend to go out again, I will leave on the road, so there are four places around the property where I will park them, which goes where depends on if likely to use it again soon. With the EV car, one has to decide where it will be parked, and this can be dependent on furniture in the drive or street, and how that is earthed, as to where the car can be charged.

I look at one up the road, and the car needs to be parked where it is not clear if permitted in that position, with a non-tethered car, one takes a chance, and if told to move it, you do, but when tethered with a charging lead, clearly that place must be where there is no question as to if parking there is allowed.

 

[bernardgreen]

Some marques are experimenting with wireless charging but it's not commercially available yet

Any information about how this is progressing. ?

 

[robinbanks]

Unless some bright spark discovers a away to burn CO2 and convert it into Oxygen and movement force! Hmm I wonder?

It's a chemical/physical process like any other, and it requires input energy. Plants do it all the time, as it happens, and lucky for us that they do, otherwise we would be dead. However, as a process, it requires a net input of energy (plants absorb sunlight) because the constituent elements released energy when CO2 was created, so you don't "burn CO2 and create O2" any more than you sit at the foot of a mountain and find yourself falling up it to the top

In battery terms, think of the processes that generate energy and waste products as discharging. You can reverse them and that's (re)charging. For example you can have a load of hydrogen and oxygen and burn them, capture the released heat energy and use it to do useful work. Burning isn't the only way but probably one that you're familiar with.
The waste product is water. If you capture all the water you can get more energy from somewhere and use it to turn the water back into hydrogen and oxygen, which you can burn again.

The concept is thus that you need to put some amount of energy in, to generate the hydrogen and oxygen, you can store them and later combine them to release the energy you stored. If you can do this perfectly, with no losses, you'll never run out of fuel; you'll always have some amount of hydrogen, some amount of oxygen and some amount of waste, and the energy used to convert in one direction will be the energy released in the other direction. There are always losses, and typically things end up as heat from which no useful work can be done. There is thus a finite amount of energy in the universe but we tend not to think about it because it's so far away the race won't exist as we know it

-

The fuel tank on a petrol car is thus nothing more than a battery, really, a store of energy. There isn't an easy way to recharge it at home; the waste is dumped into the environment, plants pick it up, store some elements of it, die, fall into the sediment, get crushed and slowly turn into petrol over several million years so there is a recharge process but it's too long to be useful to us so we tend to refer to it as a finite source of energy

Other fossil sources are easier to conceptualise as rechargeable batteries; you really could have a car that ran on hydrogen and oxygen, collected all its waste, and some home machine electrolysed it back into hydrogen and oxygen, recharging the power source in a similar way to how batteries are recharged. It would consume an amount of energy to generate the elements that the car releases when it burns it. If that process produced no waste heat, noise, light etc the input would equal the output

Another example that you might have come across is those hand warmer things that are a liquid and you snap the little metal disc and it releases heat energy, then you boil them to recharge them

overall the energy they released at time X has to be put back at time Y so they can be used at time Z

 

[Risteard]

They don't. They only take about as much power to move as petrol cars.. it's just that you don't really have any concept of how much energy petrol contains


You don't know what you pay for a kilowatt hour? Most people do

I pay 36p/kWh say. My ev does 3.6 miles per kWh say. My ev costs me 10p per mile

My petrol car does 33 miles per gallon, say. A gallon of fuel costs £6.60 say. My petrol car costs me 20p per mile

Real terms; the dent in your pocket

kWh are like litres. kW are like fuel pipe diameter. A 7 kW charger can pour 7 kWh of "volume" of fuel into your car every hour. Your car has a 70kWh battery. If it was at 0 percent it would take at least 10 hours to fill up using a charger that can pour 7kW every hour.

The start and end of charging goes slower, most people that want to get the most out of their battery keep the charge level between 20 and 80 percent.

You don't recharge a battery car like you refuel a petrol car (ie deplete it then take it to a special place to refill it completely). You refuel it any time it's parked near a charger you're willing to pay for, and most battery cars spend more time parked near a charger than they do being driven just by virtue of the natural car use pattern of the human owner

The mental leap is key, but you've already made it with your smart phone which you charge every night when you're not using it


It would be unusual to bring your EV into your house to charge it. If you're thinking it has some kind of removable battery you can plop on the kitchen table and plug into a socket, that would be a no; the batteries in a BEV are huge, more than half the car's weight. You don't move them, you park the car near the outlet attached to your house and run a cable. Some marques are experimenting with wireless charging but it's not commercially available yet


kWh per hour is kW

Per means divide

kWh/h means the h on the top and the h on the bottom cancel out (disappear)

kWh/h = kW

-

It's like mph per hour, also written as m/h. If I drive 60mph for (means multiply) 10 hours that's

60m/h x 10h

Also written as

60m x 10h
----------
h


There is an h on the bottom and an h on the top, they cancel out leaving 60m x 10

600 miles


But worth noting that the car has to be able to take it. Not all cars can accept a charge that fast. The manufacturer will usually be quite clear about how fast the car can charge on various charger types

Wrong. If you are charging at 7kW then you are adding 7kWh per hour of charging - not 7kW. So my point about kWh per hour is completely accurate. But kW per hour makes absolutely no sense and is an abomination.

 

[ebee]

It's a chemical/physical process like any other, and it requires input energy. Plants do it all the time, as it happens, and lucky for us that they do, otherwise we would be dead. However, as a process, it requires a net input of energy (plants absorb sunlight) because the constituent elements released energy when CO2 was created, so you don't "burn CO2 and create O2" any more than you sit at the foot of a mountain and find yourself falling up it to the top

Robin,
my flippant comments were made largely in jest.

I could have gone the whole hog and exclaimed "wouldn't it be good if we could sit on a carpet and tell it to fly?" for instance

 

[morqthana]

Ryanair flying carpet:

 

[morqthana]

You don't know what you pay for a kilowatt hour? Most people do

I pay 36p/kWh say. My ev does 3.6 miles per kWh say. My ev costs me 10p per mile

When I buy it in the form of petrol I pay about 14p/kWh. Sadly I get nowhere near 3.6 mi/kWh out of it. Not even close.

 

[ebee]

So you go to the “petrol” station and ask the guy behind the counter for 10kw hours of petrol/diesel and they fill you up.

Good. We cleared that one up!

 

[ebee]

Can we buy a KWH of gas these days or are we on BTUs ?