EV CHARGING AND FUSE

[ericmark]

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.

As you know, energy is measured in Joules, but there are a lot of seconds in an hour, I suppose since using metric system will be 1000, but seems my maths is poor today and so get it to 3600 maybe should use Calories, another metric unit, so why 4.2 joules in a calorie? Bring back the BTU all is forgiven.

 

[morqthana]

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!

I probably wouldn't bother to go if my tank was only 10kWh away from being full. Full capacity is about 665kWh.

 

[JohnD]

So-called "granny" leads (i.e. Mode 2 chargepoints) are no longer supplied with vehicles, thank God.

Is there a reason, if you visit your granny, why you shouldn't be able to charge up enough to get home or to a convenient charging station?

I had a granny who lived on the outskirts of a small rural village. Hundreds of miles away.

 

[ebee]

"I probably wouldn't bother to go if my tank was only 10kWh away from being full. Full capacity is about 665kWh."

I knew a fellow a few years back who would only go to the petrol station and spend no more than £5 unless he was going on a long journey. He also had a habit of switching off his engine the last few hundred yards of every trip.
Not to save the planet or anything but to save himself a penny or two here and there.

He was widely known as a bit of a skinflint in many ways.
He ran a very small business and had in his operation a system whereby every employee had to fill jobsheets in , in order to get paid, any hold up by any employee would prevent the whole chain from completing meaning that payroll would be held up for a day or two for his whole workforce.
His official line was that it was a system that was in place to keep an accurate track of all of his business data for the health of his business in order for it to run successfully.
He did confide in me that every time such a delay occurred his bank interest enjoyed the lift up and even more so the odd time or two it became a week or more.

One of his mottos was to run a business one favourite ingredient was use OPM (Other Peoples Money) as the key to success.
He was quite an interesting man and quite intelligent in many ways, however his "Skinflintedness" was a legend of the wrong type, some loathed him. Unfortunately one was his youngest son got married and took his Wife`s last name as his own instead of the usual tradition of the wife taking the husbands last name.
He wanted to lose his own family name because he loathed his fathers skinflintedness and the very last straw was this man claimed an amount for petrol expenses from his eldest sons trust to visit him hospital and the youngest son claimed that it was his fathers fault that the elder son had tried to end his own life unsuccessfully and the result was brain damage which left him unable to look after himself. The young son blamed his dad for the elder sons attempt in the first place.

Whereas some of you know of my "save a shilling" ethos, this man had a "save a farthing" ethos (or save a mite).

 

[Why Not Indeed]

Is there a reason, if you visit your granny, why you shouldn't be able to charge up enough to get home or to a convenient charging station?

It's not mandatory to charge at Granny's when visiting.

 

[SUNRAY]

"I probably wouldn't bother to go if my tank was only 10kWh away from being full. Full capacity is about 665kWh."

I knew a fellow a few years back who would only go to the petrol station and spend no more than £5 unless he was going on a long journey. He also had a habit of switching off his engine the last few hundred yards of every trip.
Not to save the planet or anything but to save himself a penny or two here and there.

He was widely known as a bit of a skinflint in many ways.
He ran a very small business and had in his operation a system whereby every employee had to fill jobsheets in , in order to get paid, any hold up by any employee would prevent the whole chain from completing meaning that payroll would be held up for a day or two for his whole workforce.
His official line was that it was a system that was in place to keep an accurate track of all of his business data for the health of his business in order for it to run successfully.
He did confide in me that every time such a delay occurred his bank interest enjoyed the lift up and even more so the odd time or two it became a week or more.

One of his mottos was to run a business one favourite ingredient was use OPM (Other Peoples Money) as the key to success.
He was quite an interesting man and quite intelligent in many ways, however his "Skinflintedness" was a legend of the wrong type, some loathed him. Unfortunately one was his youngest son got married and took his Wife`s last name as his own instead of the usual tradition of the wife taking the husbands last name.
He wanted to lose his own family name because he loathed his fathers skinflintedness and the very last straw was this man claimed an amount for petrol expenses from his eldest sons trust to visit him hospital and the youngest son claimed that it was his fathers fault that the elder son had tried to end his own life unsuccessfully and the result was brain damage which left him unable to look after himself. The young son blamed his dad for the elder sons attempt in the first place.

Whereas some of you know of my "save a shilling" ethos, this man had a "save a farthing" ethos (or save a mite).

I know someone like that at the moment.
A group of us were at a national trust property a few weeks ago, first off he and his wife scrounged lifts for the 15 mile journey in separate vehicles, they tend to be coffee connoisseurs but when we stopped for refreshment they refilled their waterbottles from a tap rather than buy a drink and shared the cheapest food in the place which happened to be a scone but not anything to go on it then grabbed a scrape of left over butter and pickle when others had finished... walking round he picked up a couple of bent nails, I assumed as a safety thing but someone asked if he was that desperate to straighten them, he said for the scrap value. To put this into perspective they were about 30-40mm wire brads.
I'm all for saving and recyling and yes I do take my scrape to the scrap yard to sell if I think it's worthwhile otherwise leave it out for the totters but to my mind those nails weren't work stooping down for.

 

[JohnD]

It's not mandatory to charge at Granny's when visiting.

But it may well be necessary.

 

[plugwash]

It's not mandatory to charge at Granny's when visiting.

It's not mandatory, but if your family is anything like ours and there are 174 miles between granny and niece then even with a big battery EV you are most likely going to want to charge up during the trip (especially as the trip is unlikely to be just there and back). You could use public chargers but those are expensive, and eat into time that could otherwise be spent with granny.

 

[robinbanks]

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.

I'll try again:

You said:

kWh in an hour - NOT kW

I interpreted this to mean "[the number of] kWh [delivered] in an hour [is] NOT kW"

--

Yes it is. A 7kW charger running for an hour will deliver 7kWh.

A charger that delivers 7kWh in an hour, is flowing power at 7kW

This is what I said, and it's what your second post said, so you can't start a post with "wrong" and then agree with what I said

--

The rest of your post is just talking in a circle and then either making a typo with your units or losing the grasp of understanding you demonstrated prior.

You can't have "7kW per hour" when talking about the amount of energy delivered or the rate at which it was delivered because "per is divide", and 7kW/h doesn't make sense unless you're talking about the rate of change of power, i.e. "This charger is a 700kW charger, but it ramps up linearly at a rate of 7kW/h. If you set it going now, in 100 hours' time it will be delivering 700kW of power"

don't draw 10A for more than an hour or the socket will overheat.

I'm not certain you can be so definite as to be delivering that as a fact/rule that all should obey. If you want to prefix it with "when using my granny charger I keep to a rule of thumb of '...'", that works

 

[ebee]

I know someone like that at the moment.
A group of us were at a national trust property a few weeks ago, first off he and his wife scrounged lifts for the 15 mile journey in separate vehicles, they tend to be coffee connoisseurs but when we stopped for refreshment they refilled their waterbottles from a tap rather than buy a drink and shared the cheapest food in the place which happened to be a scone but not anything to go on it then grabbed a scrape of left over butter and pickle when others had finished... walking round he picked up a couple of bent nails, I assumed as a safety thing but someone asked if he was that desperate to straighten them, he said for the scrap value. To put this into perspective they were about 30-40mm wire brads.
I'm all for saving and recyling and yes I do take my scrape to the scrap yard to sell if I think it's worthwhile otherwise leave it out for the totters but to my mind those nails weren't work stooping down for.

Yes I know tell of one or two folk who their regular group eventually realises that they always run things to favour themselves, always the last one to buy a round of drinks, or always the ones who insist each person pays only for their own meal then subsequent buys the cheapest meal for themselves and then helps themselves to other persons unwanted items, essentially enjoying the potentially most expensive amount at the table but paying the lowest price of all.
Eventually after a few times then people begin to realise this constant and tend to tag them with names like "Mister Freeloader" etc.

Another notable action with meals is some folk who declare themselves as vegetarian so do not eat meat, only chicken! but still insist that they are vegetarian.

They get terribly offended when somebody "outs" them . LOL.

 

[SUNRAY]

We eat at weatherspoons quite often with them, noticably early evening. We often found them already eating rather than waiting for us to all arrive ... the prices change a little at 5pm. Oh and free top up hot drinks, one would always say they didn't want a drink then share the cup and have about 8 just because.

Going back 50 plus years, as apprentices my 2 best buddies and I socialised quite a bit, then it morphed into 6 with girlfriends.
In a pub one guy would want 4 to 6. I would want a couple, as it happens I always had the biggest car so was usually DD, the other drank something in the middle. Our girls matched us fairly well.
The difficulty we had wasn't the cost or miser attitude, we were being dragged down the drinking more than we wanted route, so decide to buy our own .

 

[ebee]

Years ago we had a favourite restaurant the two of us went to just now and again. When we were out for a drink with the Sister in Law and her other half then he would always insist we each bought our own drinks, so whether 2, 3, 4 or more couples we all bought our own.
I was happy with that anyway because I`d been stung a few times and I guessed he had too.
So far so good.
However they two of them always asked what price our favourite charge say for steak, chicken etc and then exclaimed that their favourite (a small place) charged less.
One day we agreed to go to their place with them.
I noted that unlike ours, the chips, peas, mushrooms, pies and sides of bread, breadsticks, olives etc each attracted an extra cost, there a like for like meal cost considerably more at theirs.
I really wanted some mushrooms but decided against to cut my costs down a bit.
Thein laws had all the extras, then suggested we all split the bill equally.
S W M B O kicked my leg as a signal to not object.
The result was that I missed me mushrooms but they didnt and I ended up effectively paying some towards theirs.
Bah Humbug!
a few years later our favourite place started charging extra for the additions too rather than all inclusive main meal.

My father in law was a right "nip" going out of his way with time and petrol to save a hundredth of a farthing.
Fair enough he came from a bygone age where materials were expensive and labour was cheap but bloody hell he did not half take it ti extreme excess!
To be fair, he had 8 kids to support so he had to use every bit of skill and cunning to make a do.
But he did go way OTT, it often caused a laugh. I could write a book about his antics, not criminal but an education nonetheless

 

[SUNRAY]

Years ago we had a favourite restaurant the two of us went to just now and again. When we were out for a drink with the Sister in Law and her other half then he would always insist we each bought our own drinks, so whether 2, 3, 4 or more couples we all bought our own.
I was happy with that anyway because I`d been stung a few times and I guessed he had too.
So far so good.
However they two of them always asked what price our favourite charge say for steak, chicken etc and then exclaimed that their favourite (a small place) charged less.
One day we agreed to go to their place with them.
I noted that unlike ours, the chips, peas, mushrooms, pies and sides of bread, breadsticks, olives etc each attracted an extra cost, there a like for like meal cost considerably more at theirs.
I really wanted some mushrooms but decided against to cut my costs down a bit.
Thein laws had all the extras, then suggested we all split the bill equally.
S W M B O kicked my leg as a signal to not object.
The result was that I missed me mushrooms but they didnt and I ended up effectively paying some towards theirs.
Bah Humbug!

Been there with 'them' too. While hosting a Chinese/Indian takeaway at home, 'they' suggested suggested we all chipped in.
Several meals later we hosted murder mystery which was based around a takeaway meal, so we bought in takeaway and much to 'their' disgust the other 2 couples insisted on splitting the cost 4 ways, 'she' even said they didn't expect to.
Our group has got very good at getting around 'their' quirks but none have ever discussed it as far as I'm aware, within the larger group of friends (historic colleagues) are a clique of 3½ couples but single person lives a distance away so generally 3 couples, in particular we seem to do a car share of 4 or 5 and guess which couple is normally in their own car

a few years later our favourite place started charging extra for the additions too rather than all inclusive main meal.

My father in law was a right "nip" going out of his way with time and petrol to save a hundredth of a farthing.
Fair enough he came from a bygone age where materials were expensive and labour was cheap but bloody hell he did not half take it ti extreme excess!
To be fair, he had 8 kids to support so he had to use every bit of skill and cunning to make a do.
But he did go way OTT, it often caused a laugh. I could write a book about his antics, not criminal but an education nonetheless

Like many on here I grew up in the 'make do and mend' post war era, my father was a POW taken on Channel Islands and mother was one of five from a farming family, when they met dad was living in the vicarage and when they married they moved into a building in the vicarage grounds which I understand was disused animal accomodation so basically they started with nothing but very lucky to have (what I assume was) a free roof to live under which included a tap, my sister was born there. Being pregnant with me in 1955 they were lucky to be allocated a 2 bed mid-terrace council house.

I clearly remember helping dad dismantle grey painted wooden boxes which I assume were ex Army and then sitting for hours with a hammer straightening the nails so it could all be reused, I guess I was about 5-8 at the time. I'm still a bit like it as I don't like wasting the worlds resources but no I don't straighten rusty nails any more.
Buying my first house in 1983 which needed major refurb I'd pushed my finances to the limit (truthfully way beyond at 16½% interest rate), so truthfully I am very aware of hardship but circumstances have changed as we have aged, as it has for 'them' - his work took him away from home for roughly the last 10 years of his working life and he didn't tire of describing the tax free financial benefits, which exceeded his normal pay as a senior manager in a national company, in addition to all expenses while away.

 

[JohnW2]

.... so why 4.2 joules in a calorie? Bring back the BTU all is forgiven.

That's a bit like asking why a mile is about 1.61 km or why an inch is 25.4 mm - in all such cases, the answer is 'because it is'

Whilst Joules and Calories are both units of energy, they are defined in totally different ways (as are miles and km, or inches and mm) - one is defined in terms of mechanical or electrical energy, whilst the other in terms of thermal energy (but those different forms of energy can, in general, be converted between one or another).

If anything, we're 'lucky' that Joules and Calories are 'in the same ballpark (less than an order of magnitude difference), since they might have differed by many orders of magnitude!

 

[ebee]

A bloke asked me in the pub, "how many grams in a kilogram?" my reply was "about a thousand". Yes ok some asked me why I said "about" and my reply was "Well bytes and kilobytes! etc " .

In fact a bloke used to ask "How many thous in an inch" then adding "there must be millions of them!" but we assumed that he was saying that on purpose.