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this post was submitted on 23 Sep 2024
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Yes, whether your electric plant is coal, natural gas, or honestly even if it was diesel. Larger engines are more efficient than smaller ones. It's been a long time since I broke down the math over 10 years so my information is probably wildly out of date but even 10 years ago when you broke down the math charging an EV from a fossil fuel plant of any kind was still ultimately more efficient than a gas car in the long term.
Couple that with the ability of many EV now to also act as a battery for your house and that just goes wildly into the EVs favor if you utilize that for peak demand offset. Which many people could do easily even if it meant not having their battery fully charged in the morning when they go to leave for work because let's face it very few people drive more than 60 miles full round trip in a day so even with their battery at say half they would have more than enough for their whole day plus extra.
Yes the MIT link covers coal. At worst it's on par with gas cars. They get better as the energy source mix does but they aren't worse than gas powered cars.
It's pretty simple really if you look at commuter traffic. Each stopped electric vehicle does nothing while stopped.
Aside from heating or cooling the occupants, that is.
Yeah, compare 500w heating to 30kw starts. But it does matter if you're gonna be there eternally for 8 hours or something. Heating is inefficient when you're not doing something else with the water before hand.
Somehow instead of having a GPS app tracking traffic to top off the batteries before you get there, I much rather have an app try to convince me to park my car, take a bus and try again tomorrow.
Yes you can get the emissions per equivalent kilowatt hour of both. Especially since there are many electric generators that are just using a car engine. And it's a known fact that at least in terms of energy generation larger motors a better conversion rate of fuel to electricity and power plant Motors are quite a bit larger than most cars. Unfortunately I only really have my phone available to me at the moment and I'm a little busy so I don't have time for much more than these quick replies but over the next couple days if I get a moment I will come reply to this again after finding the actual figures if you haven't already found them yourself which please do reply to this with them if you find them
The "break even" point is still somewhere around 150k miles for big batteries (above 75 kWh). And while there are many EVs that have 200k on their first battery, that isn't necessarily the status quo for most of them. A simple lump of Aluminum or Cast Iron takes a lot less energy to make and can even be produced completely renewable If you factor in synthetic fuels, things look even more grey - especially with algae, there can be huge benefits growing algae in sea water (see the Arctic Algal Boom and the connected pytho plankton growth). BEVs are not "THE" answer, they are one answer to specific questions.
Not only that, the issus (environmental, child labour, etc) with rare earth elements are still not solved and the environmental damages through lithium mining are not something to just sweep under the rug.
Or maybe 13,500 miles. But what's a few zeros between friends?
Argonne assumes the batteries are produced with renewables AND they assume EVs are going to be charged over the day, when most of the renewable energy is "present". Most BEVs are charged over night, where only Hydro or Geothermal makes power. Meaning, the Co2 footprint grows exponentially, because at night most of the power is made with fossile fuels - a kWh easily can have a rucksack of over 700 gr/kWh of Co2. But hey, what's a few assumptions here or there in favour of either side, huh? Oh and go talk to China about them producing the batteries "environment friendly". Just because something uses less Co2 doesn't mean it's cleaner. A few ppm more Co2 in the Atmosphere is bad for the Climate, sure, but a few ppm more Mercury in natural habitats, rivers and lakes? Pff, who cares!
A recent study from the Association of German Engineers did factor in that most EVs are charged over night - even after 130k Miles (~ 200k km), a Golf TDI has roughly a 33 Ton Co2 rucksack, where an EV produced with renewables (ID.3) had 36 Tons.
"Most BEVs are charged over night, where only Hydro or Geothermal makes power"
Maybe in Iceland; anywhere with wind and nuclear power, this really is not the case.
And in most areas, how much share have nuclear and wind? Somewhere around 30-40% combined on average
About 30% in Europe/US; half that in China.
Electricity consumption drops sharply during the night - when wind power typically peaks. There are power companies that offer substantially cheaper rates at night for charging EVs for this very reason.
So something a swappable and universal battery design would solve that would allow lithium to be phased out by sodium batteries and would allow the usage of only the amount of batteries you'd actually need. So why are you against that as well? Or just BEVs in general?
Who said i'm against that? But with that argument, phasing out fossile fuels would solve a lot more issues than a few EVs.