If all cars were electric what, based on existing car ownership and
mileage, would be the power demand over say 24 hrs, and any estimates
as to peak?
Approximately what contribution would have solar panels at home (for
those that can have them) provide?
What technologies exist for disposal/recycling of the batteries?
32 million cars, lets say 12,000 miles/year average, and that EVs can
get 4 miles/kWh
384 billion miles / 4 = 96 TWh per year
Electricity generation has been trundling along at about 85 TWh per
quarter in recent years.
Average power if distributed evenly over 24 hours all year long = 11GW
So three Hinkley Point C's worth
If everyone wants to do it overnight make the peak at least double that,
more like triple?
Or from your figures above, 11 million kW continuous for 32 million
cars, so 350 watts continuous per car. Or about 1 kW for 8 hours. No
doubt Harry will be along soon to tell us how much his panels are
providing at the moment.
On Tue, 30 Oct 2018 15:26:00 +0000, newshound wrote:
Did this in another place recently and came up with 16 GW.
Closer to triple assuming an 8 hour overnight charge cycle.
Summats not right there a EV battery is more like 40 kWHrs not 8...
Home chargers are rated at about 7 kW.
There's barely 9 hours dawn to dusk up here now and that's "daylight"
almost certainly not enough light to generate 1 kW for a significant
amount of that period. Mid winter daylight is down to 7 hours.
I do 4k (well, my wife and I do that between us). The 8k figure comes
from the RAC link I included in my previous post.
The car is a 12 year old Volvo with a about 60k miles on the clock. I'm
hoping to run it another 10 years, until it gets up to 100k. :)
I'll happily trade up to a new car once I can get one with reasonable
self-driving capability, and I think 10 years might just about do it.
Mine is a 13 year old Hyundai with about 65K kms on the clock.
I'm looking at what is buyable now because the Getz doesn’t have
a cruise control and that’s a damned nuisance on long trips which
I do a few times a year. Noticed when browsing that the best of
them will even do full cruise control in start stop congested traffic
with the cruise control completely automatically moving forward
It would be handy to have a full set of cameras that would make
parking in tight spaces more convenient.
Some of them even do fully auto self parking now.
That would certainly be convenient.
Cost isnt a major consideration for me, I've never
going to spend what I have accumulated so I might
as well spend it on interesting toys that are useful.
I'd love that but arent prepared to wait for that.
Not clear if they will still be letting me drive then,
or if that changes with self driving cars, or even if
I will still be around then. Likely I will be given how
long my dad lasted.
Some days I drive a short distance to the shops or to visit a local client;
other days I have to drive much further, and probably beyond the range of an
electric car. There's more than just average usage to consider - peak usage
is also important.
For a given car/driver maybe, and AnthonyL hasn't been back with any
comments, but I got the feeling he was interested in how
feasible/infeasible it was from the infrastructure supply side to keep
an all-electric fleet charged, rather than individual vehicles to carry
drivers as far as they need to travel?
Correct - Andy Burns has supplied some figures and a few useful
sources have been quoted for no of vehicles, average mileage, kwh/mile
etc. I've punched some numbers into a spreadsheet but can't yet
reconcile them with Andy's figures, too easy to get a decimal point
out of line.
The last time the government made a major push for a technology for
vehicles they incentivised the use of diesel with tax breaks etc. I
would image at the time every Mechanical Engineer would have rolled
their eyes in despair. My green sister wouldn't listen and bought a
diesel even though she barely does 5,000 miles/year. My friend's
diesel kept choking up because it only did slow and short distance
Anyhow I'll do a bit more work on the sums in a couple of days time
and chuck my figures into the discussion.
Taking the lower 8000 miles per year rather than original 12000, but
sticking with 32m cars and 4 miles/kwH
On Tue, 30 Oct 2018 19:24:07 -0700 (PDT), email@example.com wrote:
Yes they do, but it's beyond any common sense for anyone to drive 100k a year.
Over say a 40 week working year, five days a week that's 500 miles a day. Even
as a one off it's tiring regardless of the comfort of the vehicle. To do it
every day is absolutely crazy and you cease to be functional, and you totally
cease to be of any value to your customer or your company.
In the past I've done 200 miles a day for weeks on end with anything from a 6
hour day to a 16 hour working day at the end of that traveling and it it utterly
More recently 150 miles a day, with at least one leg 'offpeak' even on a
relatively free running motorway (at times) is beyond what I could take even two
days a week.
On Tuesday, 30 October 2018 15:26:04 UTC, newshound wrote:
As it's dark, zero.
I run my car about 75% off solar power. More in Summer, less in Winter.
But that's only possible because I'm retired.(And I have solar panels)
I can pick and choose when I travel and when to charge the battery.
There's no way every new car can be electric by 2040.
We don't have the infrastructure.
In the immediate future, charging cars will be done at night by most people.
But that spare capacity will soon be used up.
Maybe we could have solar panels on workplace buildings but that wouldn't help on dull/short days.
I think the age of mass motoring will end in the next decade.
The electric train will take the strain.
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