I'm sorry. They tried to jump start their battery powered vehicle?
this post was submitted on 16 Apr 2025
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Yes! EVs still have a smaller ordinary car battery in them. It charges from the main battery in the same way in a ICE car it will charge from the alternator. If the main battery is dead, or just for some reason not charging the small battery, it can effectively act exactly as if an ICE car has a dead battery.
Fun fact, you can also use that fact to use existing car battery to mains power gadgets in the case of a home power outage without the more complex dedicated reverse-charging that only some cars (and chargers) support, but without running an ICE in/outside your house for hours.
Really? Setting up a pure sine wave inverter 48VDC to 115VAC/60Hz (or 220VAC/50Hz) is all one would need to do to supply single-phase mains to a home via EV? I guess it could depend a lot on the rated current capacity of the circuitry between the EV's Li-Ion main bank and the 48VDC secondary battery.
As an example, https://arstechnica.com/gadgets/2025/03/old-bolt-new-tricks-making-an-ev-into-a-backup-power-station-with-an-inverter/
12vdc for a Chevy bolt, with the caveat that it maxes at 1500w so only use a 1000w inverter.
It’s not a great way to do it, but it does work.
1kW ain't too bad for a short emergency. I was bummed when I found out the Greenworks 80V inverter maxed out at only 300W, since I had a nice collection of 80V yard equipment batteries.
Well, when you know you’re sitting on ~60kw of battery, it’s a bummer. The reverse feed system some cars have is promising though.
Vehicle-To-Load should be a blitheringly obvious feature for any electric car, and the fact that you have to go out of your way to even find a model with it should frankly be considered a cardinal sin of the whole fucking industry.
Like holy shit, all electric cars are effectively just powerwalls with wheels, this alone is such a big deal that anyone living even remotely rurally (including a lot of american suburbs) should be clamoring to get one since it would let you get through a multi-day power outage without losing all the food in your fridge and being able to power things like computers and phones. And you can even theoretically drive to the nearest place with power to charge your car, then bring that charge back home!
but no, implementing V2L is slightly more expensive thus they only bother on some models, and of course no government anywhere can be bothered to even politely request that companies implement it in all models..
That blows, they've got 500w inverters for the 24v & 40v batteries, but only 300w for the 80v
electrical vehicles often have two battery systems - a 12v, 24 or 48v battery for the accessory systems like your windshield wipers and radio, ECU, door locks, windows etc - and the high voltage power system that runs the motors.
why not run it all on the high voltage system? tbh, I think we'll get there eventually, but atm it's easier to isolate them from each other so you never get 400v going to the driver window or other accessories. For the last 100ish years all these systems - motors for windows, wipers, seat adjustment etc all ran on 12v. Auto manufacturers redesigning everything from the power perspective didn't make a lot of sense when it's all available off the shelf if you can feed it 12v. And considering the vagaries of charging the high voltage systems, having a separate 12v means even if the fancy shit goes tits up, you should still be able to unlock the door or turn on the hazard lights.
IIRC Hyundai even has a crossover circuit that you can engage to allow you to jump the low voltage system off the high voltage pack, but I have no firsthand experience with this.
Yeuuup. Gotta be able to turn the car 'off', and if the car is off (disconnected contact loop to engage the big battery) it cant receive the signal to turn on. (Connect the contactor to engage big battery)
So something has to always be on.
Which makes the big 'fuel' battery into a fancy alternator to keep the 12v/48v stuff on and running lol.
If you disconnect the tiny (in comparison) 48v battery from the main battery it wont charge and the car dies even if the big battery is fully charged.
Long story short, teslas fail to modern car problems but with the added bonus of failing to other dumb tesla-specific problems.
Seeing a heavy duty diesel tow truck haul a cybertruck is about as on-the-nose as you can get for the reason it sucks.
Same thing happens with the Nissan Leaf, it has a 12v battery and it needs to be in good shape to start the car.
Frustratingly my phev ford did the same thing when I left it parked for a week, even with the evse attached
Yeah it's weird that they didn't include something to also charge the 12v while the car is connected
even with the evse attached
whaaat? why, was it set up on a charging schedule or something?
Lol when I get out of my car I park in the garage and plug it in. It stays plugged in till I need to drive again. No charging schedules since they shut down the 3G networks because reasons
I've jumped a Tesla (Model S I think) a few times. It's actually pretty easy. Just pop the grill off with a credit card and there's jump points there. Once I jumped it, the main charging system would be available for use. Plugging in the main charger then keeps the 12v battery charged and you're good to drive again. This I believe is a well engineered system and Tesla made it easily accessible.
The dumb part is that until you do that, there's no way to access the vehicle. No backup key. So if the car dies completely, there's no way to access the cabin, trunk, or hood.
The battery that does the driving is completely different from the battery that does the rest of the stuff in the car. So whilst it sounds funny, it's actually correct.
This is not a unique Tesla thing BTW, I think all electric cars work like that. The battery that does the driving has very different requirements, so keeping them separated is the best solution.
What is pretty shit from Tesla is the regular battery dying all the time. That's a pretty unique Tesla issue.
The original telsa roadster used the main battery for everything, but it was proven a bad idea because any faults in the battery would leave the car completely dead with no lights or anything. Having a second reliable battery is simply good saftey redundancy.
Yeah, my Leaf has a battery, and if the leads get corroded I can't start nor charge my battery. It sounds weird, but afiak most electric cars are setup this way.
Fake. It still has all its panels.
In this case, the battery failed before the panels.
"couldn't activate transport mode".....oy, fucking hilarious
is “transport mode” the new “neutral”?
Ha, apparently! I just can't get enough of these posts, what an absolute dumpster fire of a vehicle, company, and their customers.
And the owner, don't forget that Mr Desperate To Be Loved is also a flailing tire fire....
Pretty much.
AFAIK all Teslas need a flatbed for towing due to the wheels being locked. The "transport mode", I was told is only made for loading onto a truck.
Pretty much all EVs since the motors are directly connected to wheels and there's no clutch system to disengage.
Was this the girl with 6 teslas that has been seen posting about her experiences camping with them? Or is that another generic blonde with too much money?
Yeah, you're gonna have to be more specific....that doesn't actually narrow it down much
I saw one the other day with a wobbly axle. They’re built like shit.
Nah, this is not true. BYD and Skoda ate build like shit, but they are allowed on german roads. This vehicle isn't. Conclusion: it is build worse then shit
Nothing wing with Skoda, buddy.
Correct. Skoda cars factually have no wings. Can confirm.
Sadly, people have found ways to make them road legal in Germany. (entirety of schengen too)
They did? Last time I did see one, it was in the process of beeing confiscated ¯\_(ツ)_/¯
Yeah, I've seen some from Serbia that are just bribed plates that have gotten impounded in Germany and UK.
Sadly in Norway there's an exception for any US or Canadian legal vehicle that has been registered for at least 6 months in US/Canada that makes it so it can be brought to Norway and registered fully legal, with no modifications.
You then abuse the fact that Schengen regulations say that anything road legal in a Schengen country is road legal in any other Schengen country, and boom you can register a 6month old Cybertruck in any Schengen country.
Damit. But at least they must be still roadsafe to german standards. If on the road. But then, the cops must prove that they are unsafe for each individual one. Much paperwork, and german cops hate paperwork
At least there's a significant barrier of entry with the cost, you're not gonna get it road legal under 150k EUR.
So hey, we get some taxes out of it.
Looks like one was registered in the Czech Republic, but EU regulators are saying the details on the registration don't line up with reality. (3.5 tons on registration when it actually weighs 4) And that even the rubber bumpers added to the sharp bits, it still runs foul of the prohibitions on sharp edges.
As far as I can tell they can be imported for off-road use, they're just not street-legal.
Had me in the first half, not gonna' lie.
"Couldn't activate transport mode"
You mean turn it on? It's a fucking car whatever modes does it have?
Disengaging the parking brake, most likely.
My Toyota Rav4 has the same problem, the brakes cannot be released if the battery is completely dead and it can't be jump started. The tow guy had to just drag the damn thing into the truck.
They're trying to be fancy and not just say "nuetral gear"
Because there's no transmission, therfore there's no neutral gear.
Just working out the kinks...
I remember when cars worked.
Cars still do. Whatever that thing is doesn't.
Techie Dani’s tetched