General > General Technical Chat
Piles of Tesla owners stranded at charge stations abandons their EV's.
David Hess:
--- Quote from: m98 on January 18, 2024, 12:15:50 am ---I wouldn't know where to drive during or after an apocalypse. Realistically, you would get stuck in a giant traffic jam, awaiting anything that happens trapped in your car on a road in the wide, open landscape.
--- End quote ---
Back in the late 1990s, I sat in on emergency preparedness meetings in Orange County, California and always got a chuckle about that. Any plan which relies on mass evacuation would never work because if the freeways were usable, then millions would be trying to use them. The best option then becomes a vehicle with considerable off-road capability, like a motorcycle that can drive around traffic, but you are hardly going to evacuate your family on a motorcycle and they have a surprisingly short range between fueling.
Not too long ago we saw examples of this in Florida and the Gulf Coast when hurricanes prompted mass evacuations. Even starting days ahead of time was not enough, and if traffic jams were not enough, the fuel stations along the evacuation routes ran out of fuel stranding even more people. In the past I have occasionally kept enough 5 gallon cans of gas in the back of my pickup to double its range.
And if you think electric vehicles will save you from this, during the evacuations in California, some electric vehicle owners found themselves stranded when power was lost or even deliberately shut down over wide areas.
Siwastaja:
--- Quote from: tom66 on January 17, 2024, 11:49:22 pm ---Do you have a link to that report? 1.1kW of losses is crazy high for a 3.6kW charger. I measured the loss on my ID.3 at around 350W for a 7.2kW input. I expect it is probably around 200-250W for a 3.6kW input. Most of it is expended on running battery pumps, contactors, computers, fans etc. If the battery heater has to run that's another matter but typically not needed unless well below -10C.
--- End quote ---
Let me play devil's advocate and suggest nctnico remembers the testing condition wrong, and is talking about charging at 230V 8A, not 16A as he says, and includes full charge with a rather long balancing/CV phase. Then 70% total efficiency would be probably spot on, due to the loads (pumps etc) you mention, unless manufacturer has paid special attention to minimize this draw. Charger efficiency itself is around 90% of course.
BrianHG:
:-DD |O
(Sorry about the commentator appearing like AI generated, but the story was too sweet...)
Siwastaja:
What's wrong with burning wood? I'm 110% positive these "free thinkers" would piss their pants from excitement if they could burn wood supplied by some massive multinational company in their internal combustion engines (at least if it emitted enough black smoke), and it's only the freedom and creativity of others which pisses them. Wood grows by absorbing solar energy and CO2, releasing the same CO2 when burned. It can be easily stored and transported, and therefore one can burn wood when the wind and PV production are insufficient. The only potential issue is overuse. This is what I do to heat my house: heatpump using energy from the grid when it's cheap and clean, own PV when the sun shines, and during very cold and expensive periods, usually 1-2 weeks a year, burning oil and/or wood. The amount of oil and wood used is very small but it makes a big difference for total feasibility and safety.
But I understand free thinkers want unary solutions, preferably managed by communist state, or, alternatively, by large faceless corporations.
tom66:
It's all about "green bad" basically. If a technology has an environmental benefit then it's automatically bad because they don't trust people that promote and implement these kinds of solutions. Fear of change perhaps? Without getting too political that kind of is the definition of "conservativism" as a political viewpoint - everything's fine, don't change it.
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