I think 4 miles per kWh is rather optimistic. In general in real usage terms its nearer 2....
...and no one who is driving a 33mpg car is likely to be satisfied with an electric. The market would be those who want to replace their 50mpg Golfs and Skodas...
I thought we were looking at inductive coupling - works well for the electric toothbrush, so why not :-)
Maybe not too far from being accurate for those who only use the ICE vehicles for short journeys for the school run or to the local supermarket and seldom take their cars above 30mph. Even a ICE vehicle with a quoted 50mpg figure is likely to return 30mpg if the engine is seldom up to temperature and the alternator is always working hard to replenish the battery charge from frequent starting and short runs in stop/go traffic.
4 miles per kWh is probably well achievable in 30 mph limits, possibly a bit less in colder weather*. As the manufacturers admit, it's higher speed that mainly reduces the miles per kWh figures.I now remember where I saw the web page with the EV range calculator :)
When I was younger I used to drive 400+ miles in one day quite happily - longest I recall was London to Aberfeldy (470 miles), the last hour in a snow storm. However having passed the age of 80, I find I am having to slow down. 250 miles per day is quite enough.
Probably 2 such journeys per year.
A colleague reckons he can recharge from a normal 13A socket at 8 mph, which would be closer to 4 miles per kWh. I can't remember what his vehicle is, but it's not a small car.
I know it's 25 miles range per hour charging from a 32A feed.
Well that;s about what I get out of my 3 litre 280 bhp Jaguar, at an average trip speed of 30mph.
On a run that will do 40mpg.
Maybe.
Yeah, but that;s on the Renault site, innit?
On the jaguar site my XF is quoted at 42mpg. *Overall.*
That is blatant nonsense.
One tap of the brakes and its scurrying below 30mpg getting up to speed again. Now I know that regenerative braking pn te E-car helps, but its not 100% efficient.
And the Renault Zoe, is by any stretch of the imagination, underpowered: a similar car might be a modern one litre car, genuinely capable of about 50mpg+
So you are not comparing like with like here.
Then quite clearly you haven't watched him recently.
Indeed
Perhaps
Does this mean there is now an argument for upgrading existing equipment rather than replacing, as was generally the preferred option? My PC is about 12 years old now and will not run Windows 11. I am finding the chip is a bit underpowered at times. The optical drive is noisy at start-up. I am assuming that fitting a new chip to the existing motherboard may not be practical. I have extra RAM and two SSDs so I am wondering if it would be practical to get a new machine built using many of the existing components.
My brother says it is much safer to do it while the vehicle is stationary with the handbrake on.
Also important to keep in mind the trade-in value, which will depend on the battery condition.
Clock speeds on conventional systems will be limited by the printed circuit board supporting multi-gb rates without losses or interference. Making the processor cells smaller is limited by quantum/molecular effects. On the other hand having 3GB/s clocks on a 64-bit system with 16GB of on-board memory should give most people what they need.
And unlike IC cars where the service history and mileage are easily faked, EV cars are more likely to record a lot more data like the number of times it was fast-charged.
Until the second hand market grows for EVs and the charging record is hacked.
32mph takes more than 8x the power etc.
That's why they keep changing the sockets and chipsets.
To prevent your style of "cheapness" :-)
It used to be sweet, to upgrade a PC for next to nothing.
The worst part of upgrading, is what your OS choices will be when you're finished. Windows 7 is supported up to Skylake, which is ancient history now.
Your RAM could be DDR3, current types are DDR4 and DDR5.
Your SSD should work :-) But they are working on ways to ruin that, such as the PCI Express Rev5 interface for NVMe, having different mechanical dimensions than Rev4. SATA III on the other hand, still works as it always has.
New machines have no floppy interface.
New machines have no IDE cable.
New machines may have no PS/2 for your nice old keyboard. USB2 only.
New machines have no PCI slots (only PCI Express). I cannot plug in my old PCI IDE card and access a ribbon cable drive any more. There are not as many expansion slots on motherboards either.
Motherboard sound is good enough. Check that it supports 7.1 and has a convenient set of connectors. The twits have made all the analog connectors black in colour now, because they're twits. The audio stack should be a 2x3 matrix of 1/8" connectors. They sometimes replace one of those with a TOSLink square (optical output to your AV receiver).
Motherboard video is good enough, if you're on a budget. The GPU inside your CPU, may even accelerate video (MP4) playback for you.
There are processors with no GPU - it is a mistake to buy those. You shave $20 off the CPU price, then have to buy a $200 video card to "catch up". It's better to get a CPU with a GPU inside, just in case your video card breaks, and you still want to use the computer. The motherboard has an HDMI and a DisplayPort connector for that, on the I/O plate.
Some of the cheapest video cards, have no hardware acceleration for video decoding. A video decoder equipped card starts at about $200 USD. Cheap video cards also don't have x16 wiring, and the sleazy ones have only x4 wiring. Think of the pennies saved on coupling caps for the PCIe lanes :-/
The price of an upgrade today, is about double what it was in the "fun days". If you must have a plugin video card, you could double the system price again, for a fancy one.
*******You *can* run Windows 11 on your machine.
1) Download the free ISO from Microsoft.2) Use rufus.ie tool, to transfer the ISO to the USB stick. "Tick all the boxes". This defeats the hardware advisor, and allows machines with no MBEC or TPM, to receive the OS. Note that doing this, may defeat some future functions. But making RecoveryDrive.exe based sticks would not be in your interest anyway.
But if you want to brag to people that you have run Windows 11, this is the way to get there. Warts and all (no MBEC == slow).
Start with a clean spare drive, so you don't screw up your existing OS disk drive.
And some day, the TPM (unpluggable one) will be replaced by Pluton. Which can't be unplugged. And might be used some day for DRM. It could also be used to lock out Linux (because it can't be unplugged to make it go away).
Once AMD processors get a logic block, it tends to be all over the place (they try to use the same arch, everywhere). Maybe it isn't as widely deployed as suspected. It's hard to say for sure, when a module can be inside a processor and just disabled.
My Windows 11 (that I'm typing on), is not using the TPM at all. I have a plugin one. So while it checked for the TPM, the TPM hasn't done a damn thing yet. Part of the reason, is Secure Boot is turned off so that Linux boots can be as easy as can be. (Linux supports Secure Boot via a signed shim, but you can still be pestered by the OS having done so.)
If companies want to put a jumper on the board to disable Pluton, I'm all for it. Unfortunately, that's not how these things work. Everything you do in hardware now, is "all or nothing". The Intel Management Engine was like that, no jumper, can't turn it off. At least TPM, you can unplug it.
Paul
Inductive might be around 85% efficient. Plugging in is better for your wallet.
Slow charging at home, might be better for your wallet too. Your home charging rate, can be lower than the roadside stand.
Paul
Snip
Yes, connections and interfaces have changed but was it deliberately to make older machines obsolete or because technology has advanced so far so fast. There is also the switch away to the alternative of a laptop or notebook and it wouldn't be possible to have small lightweight machines if they had to support wired parallel ports for printers etc.
I ditched the large PC desktop case and large monitors 12 years ago in favour of a much smaller footprint machine and haven't regretted it. I used to have desk for computing because the hardware necessitated it. I now type this sitting on my couch with the laptop resting on my knees and connected to my router via wi-fi.
If you are not into high end gamming or need a large screens for work related designing then question the real requirements for the next computer. Just because X £100s was spent on a computer 12 years ago and Y £100s upgrading it doesn't mean that there is an economic viable upgrade path using old components.
Even questions some of the things that you may consider in a laptop specification. My current machine has no optical drive but all my music is ripped to MP3 (other less lossy formats are available) because CDs are rapidly going out of fashion. I could add an external CD/DVD player via USB but I still have an old laptop with an optical drive as a emergency backup and a dedicated Blueray/DVD/CD player under my TV.
It seems it’s a bit better than that (88-93%) which is supposedly pretty comparable with home plug-in charging systems but the time you’ve taken into account all the power conversions, resistive loses etc.
Undoubtably cheaper except when the public charging costs are subsidised. We still have some free public charging in South Ayrshire.
Tim
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