On Tue, 17 Jul 2018 13:33:58 +0100
The Other Mike wrote:
On Tue, 17 Jul 2018 11:46:47 +0000 (UTC), wrote:
the sand, forget this idea of a two minute charge because thats how long it
takes for your hydrocarbon car to refuel to do 600 miles to the back end of
nowhere without stopping for urinating or whatever and realise the average
car
is, with absolute certainty, sat doing absolutely nothing but depreciating
for
many thousands of hours a year. Around half of that almost certainly at
home.

So what? Its the energy that it uses when it is moving thats the issue.

Really?

No wait, what am I thinking - its the energy they use when they're switched
off and not moving that really matters!

When I last commuted to work by car it was a round trip of about 40 miles, say

2 gallons of diesel which is approx 300 million joules of energy.

20mpg from a diesel 'car'? I could nearly get that from a UNIMOG

This involved heavy traffic and is a real world mpg, not what you might have
been suckered into believing in the EU test figures.

Now I don't know about you, but I suspect an extra 240 * 30 = 7.2KW load
multiplied by however many houses have electric cars multiplied by 7 hours
will be quite a bit extra for the local substation to cope with.

How about using real world kWh/distance travelled published for all
commercially
available electric cars rather than 'guessing'?

Guessing? Sorry, was that pre-school maths too complex for you?

Plus get this idea out of your head that everyone today drives around with a
near full tank of hydrocarbon fuel and/or they all need to do x hundred miles a

day and they need to emulate anything even remotely resembling your declared
'charging' regime

There are enough people who do high mileages for whom an electric car
currently is not viable. Sure, for the old lady who only goes to the
supermarket once a week or the guy who drives 2 miles to work and back - win.

27kWh spread across 100 hours per week 'at home', or just 270W when on charge

Recharge with 270W? LOL , yeah ok, if you hardly went anywhere you could
trickle charge on that

Here's some facts for you - a nissan leaf has a 40kwh battery. So to do a full
recharge with 270W assuming no losses would take:

40,000 / 270 / 24 = 6 *DAYS*

Feel free to point out where I've made an error in that. Or do you think a
6 day recharge time is reasonable?

On 17/07/2018 14:01, wrote:

There are enough people who do high mileages for whom an electric car
currently is not viable. Sure, for the old lady who only goes to the
supermarket once a week or the guy who drives 2 miles to work and back - win.

If I were only using it to commute, a G-Wiz would have enough range for
almost a week, but if I want to go any distance at all, I need a proper
ICE car.

My brother owns an electric car. When it was new, it did about 100 miles
per charge, so it was useful for trips to his kids' sports fixtures in
the same county as well as going shopping in the nearest town a few
miles away. After less than 5 years, he has to get his Ford Focus out if
it's more than a 60 mile round trip. Also, when his electric car was
new, he could just plug in to one of the (then rare) charging points and
top it up for free while he was shopping. Now, he is not guaranteed a
charge when he's away from home as the points are all being hogged by
plug in hybrids, and he has to pay to top up due to changes in the
systems. Progress...

He can't use it to commute to work, as it now runs out of power about 10
miles before he would get home, and there are no charging points at
work. The Ford, on the other hand still does the same distance on a tank
of fuel that it did when it was new ten years ago, and the same applies
to his 45 year old MGB.



--
Tciao for Now!

John.

On Tue, 17 Jul 2018 16:39:53 +0100
John Williamson wrote:
On 17/07/2018 14:01, wrote:

There are enough people who do high mileages for whom an electric car
currently is not viable. Sure, for the old lady who only goes to the
supermarket once a week or the guy who drives 2 miles to work and back - win.


If I were only using it to commute, a G-Wiz would have enough range for
almost a week, but if I want to go any distance at all, I need a proper
ICE car.

My brother owns an electric car. When it was new, it did about 100 miles
per charge, so it was useful for trips to his kids' sports fixtures in
the same county as well as going shopping in the nearest town a few
miles away. After less than 5 years, he has to get his Ford Focus out if
it's more than a 60 mile round trip. Also, when his electric car was
new, he could just plug in to one of the (then rare) charging points and
top it up for free while he was shopping. Now, he is not guaranteed a
charge when he's away from home as the points are all being hogged by
plug in hybrids, and he has to pay to top up due to changes in the
systems. Progress...

I'm guessing battery life is going to be a serious issue with electric cars
unless a viable alternative to lithium ion is found. The amount of waste
generated, or altenatively the amount of energy required to recycle them is
going to be horrendous.

work. The Ford, on the other hand still does the same distance on a tank
of fuel that it did when it was new ten years ago, and the same applies
to his 45 year old MGB.

But I presume the mgb has probably has had some major servicing and repairs done
on the engine. Those 60s and 70s engines really didn't last very long without
it.

John Williamson wrote:
My brother owns an electric car. When it was new, it did about 100 miles
per charge, so it was useful for trips to his kids' sports fixtures in
the same county as well as going shopping in the nearest town a few
miles away. After less than 5 years, he has to get his Ford Focus out if
it's more than a 60 mile round trip. Also, when his electric car was
new, he could just plug in to one of the (then rare) charging points and
top it up for free while he was shopping. Now, he is not guaranteed a
charge when he's away from home as the points are all being hogged by
plug in hybrids, and he has to pay to top up due to changes in the
systems. Progress...

What model of car is it? All are not created equal. The battery lifetimes
seem much worse on those without a battery temperature management system (eg
Nissan Leaf), against those with liquid cooling.

Theo