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Tesla Wall Connector bootloader bypasses the firmware downgrade ratchet
- 486sx33 5mo agoWhy would I want to hack the bootloader for a wall charger? Asking for a friend
- culi 5mo agoYou can bypass vehicle restrictions. You could potentially then use it for J1772-compatible EVs (like a Chevy Bolt or Nissan Leaf) Or just for the spirit of actually owning the shit you pay for.
- m463 5mo agoI don't think there are any restrictions. I think j1772 might just work with an adapter (adapt from the nacs plug to the j1772 plug) I thought tesla even made a j1772 native wall connector.
- akerl_ 5mo agoCan confirm. I've used an adapter to charge 2 different non-Tesla cars off my wall connector.
- adamsb6 5mo agoI use my Gen 1 Tesla Wall Connectors to charge my NACS-native Lucid Gravity.
- mprime1 5mo agoThere are some restrictions. I had the foolish idea of installing a Tesla charger at home to charge my Bolt. I’ve been unable to ever use it. The wall charger works fine with Teslas. My car and adapter charge fine at Tesla superchargers. But the home Tesla charger refuses to charge my Bolt. (Yes I disabled vehicle restrictions and tried all sorts of combinations of settings for weeks before giving up. Tesla support was useless of course) Restriction or bug, same difference.
- cogman10 5mo agoReally gross. I have a gen 1 charger and it's dumb as bricks. Basically just a giant relay. I guess I could see why you might want to restrict who can use your charger, but I really prefer the "dumb as bricks" version I currently have.
- emilecantin 5mo agoThey make a "universal charger" for this express purpose. It even has the adapter embedded in the holster, so you can either grab just the NACS connector, or the connector + J1772 adapter in one smooth motion. Just don't try to use that adapter on another NACS connector like the Mobile Connector, it'll get stuck and you'll have to do some magnet shenanigans to get it off (ask me how I know...) NACS on Level 2 has the same number of pins, but speaks a different protocol than J1772, so just a normal "dumb" adapter won't work. You either need a Connector that can speak J1772, or a TeslaTap.
- doublepg23 5mo agoA NACS to CCS (L3) adapter won’t work with L2 chargers, you’ll need a NACS to J1772 adapter. This is the one I use https://ev-lectron.com/products/lectron-tesla-to-j1772-adapter-max-48a-250v-for-tesla-high-powered-connectors-destination-chargers-and-mobile-connectors-black https://ev-lectron.com/products/lectron-tesla-to-j1772-adapt...
- tass 5mo agoIf you’re using the same adapter successfully at a supercharger, you have the wrong adapter for AC (level 1/2) charging.
- gwbas1c 5mo ago> I thought tesla even made a j1772 native wall connector. At least a few years ago, they would openly recommend it for non-Teslas. I thought NACS brought some changes to Level 1 and 2 that aren't backwards compatible with J1772? I know there's an oddball voltage in there so you can put a NACS charger on a lamppost where J1772 would require a transformer; but I didn't think there were protocol issues too.
- bluGill 5mo agoJ1772 is 120V or 208-240V. Those are by far the most common voltages in the US. (208 is what you get when you take a US 3 phase system and connect to two phases - this is somewhat common and most people don't know or care that their apartment is wired like that). I have seen other voltages at industrial sites, but I wouldn't expect that in a lamppost.
- gwbas1c 5mo ago277 volts, which is line to neutral in a 480 volt three-phase system. It's common for lamp posts in parking lots. J1227 would require a transformer, but NACS doesn't.
- ashoeafoot 5mo ago[dead]
- decimalenough 5mo agoWhat vehicle restrictions? This is for the Tesla home charger, not Superchargers.
- brianwawok 5mo agoExactly. Charge both my Tesla and my leaf with mine.
- culi 5mo agoOlder models are locked to Tesla vehicles. Tesla has regional restrictions in many parts of the world. You also never know when there could be another update and your region becomes one of those that has these restrictions.
- Rebelgecko 5mo agoSome don't support j1772 adapters with non Tesla vehicles
- NewJazz 5mo agoImplement your own payment provider
- fc417fc802 5mo agoTo play doom on it?
- kotaKat 5mo agoPublicly accessible piece of equipment that could have a pseudo-trusted connection to an internal network (since they're connected to the Tesla Cloud(tm)). Picturing someone rolling up to a charger outside of a large office building, 'plugging in', exploiting the charger via the communications, then using the charger to pivot inwards.
- m463 5mo agoI hate the gen 3 wall connector. It creates a wifi access point in your garage that you cannot turn off: TeslaWallConnector_<unique-id> some people were able to downgrade their firmware to a version that didn't do that, but i guess this article shows telsa got rid of that ability. I would love to be able to hack any firmware to disable that. I also read that a connected tesla car can force an over-the-air firmware update maybe through the charging cable or wifi, but I haven't verified that.
- deleted 5mo ago[deleted]
- iugtmkbdfil834 5mo agoThank you. This information is not listed anywhere and I am currently getting quotes for solar panel build.
- ralph84 5mo agoThe SSID stops broadcasting after the unit is commissioned, unless you're using power sharing between multiple units. In that case the SSID is used for the units to communicate.
- m463 5mo agoby commissioned you mean "connect it to your home wifi and let it talk to tesla"? (i won't do that) because it hasn't gone away after configuring the setup stuff (amps, etc)
- mystraline 5mo agoRepeat after me: An owner voluntarily downgrading firmware to gain control of your hardware IS NOT A HACK. And if an adversary is doing this, then they have already breached yoir physical security.
- kube-system 5mo agoEh, that’s a bad generalization. defense in depth is a thing and there are many cases where you’d want to protect against attackers with physical access
- AlotOfReading 5mo agoAny system where your defense in depth involves UDS is pretty much guaranteed to be broken though.
- zelon88 5mo agoThis isn't designed to stop attackers with physical access. This is designed to stop casual tinkerers and shade tree mechanics. You know what isn't vulnerable? A "dumb" offline charger. You know what doesn't make any money or turn the consumer into another product? A "dumb" offline charger. If it were about physical security, the suggested fix would be to remove the communication from the port entirely. Companies shouldn't get to make something simple and secure into something inherently insecure and then iterate security into it. Like drive by wire steering, or brakes. Nobody asked for these things and if you ask ANYONE who works on, builds, or actually enjoys cars the consensus is NOBODY wants it. But there are enough sophomoric, pedestrian car owners out there who gawk at the senseless overdeployment of technology and think "this is so convinient" and don't see it as 1) regulatory barrier building and gatekeeping 2) enabling vendor lock in 3) overcoming right to repair legislation. So the knowledgeable and enthusiastic voices of reason who care about cars get drowned out by the hoard of pedestrian geeks who couldn't imagine operating a car without at least a 16 inch touchscreen. In security, the best defense is not introducing a vulnerability at all. There is value in having less code. For example, if your PaaS doesn't collect user SSNs... then it can't lose SSNs in a breach. The question here should not be "why is this not secure." The question should be "why does this even need to be secure in the first place?" We have a very simple task to do and we've complicated it so much we've introduced vulnerability that didn't exist previously.
- thejazzman 5mo agoPSA: If your wall connector loses wifi, it'll just throw your charging schedules out the window and turn on/off sporadically. This is especially noteworthy if you have Time of Use billing :| SET THE TIMER ON THE CAR DIRECTLY!
- compounding_it 5mo ago[flagged]
- m463 5mo agoYour comment makes no sense. The tesla wall connector is a home charging port you install in your garage.
- compounding_it 5mo agoI knew this is about wall charger at home but I assumed ‘time of use billing’ was some kind of billing system for the charger that’s implemented.
- lexicality 5mo agosome people have variable electrical tariffs, so electrical use in the middle of the night is usually much much cheaper than the middle of the day.
- pjc50 5mo agoThat's done on the property's electricity smart meter.
- rblatz 5mo agoI spent an hour yesterday getting the wall connector back on my wifi. Apparently last October when I added wifi 7 access points my network started working in WPA2/WPA3 mode and the wall connector wasn’t compatible with that. Ended up having to create a second SSID with WPA2 only support to get it back online. Supposedly the newest update fixes that, but I haven’t taken the time to test that out. But WiFi is shocking my fragile on these wall connectors, I’ve had a lot of trouble keeping it connected to my home network over the years.
- deleted 5mo ago[deleted]
- cryptoegorophy 5mo agoWhy use Tesla wall connector in a first place and not just the standard nema/dryer outlet with the Tesla cord/charger? It seems like people are overpaying for nothing.
- tenuousemphasis 5mo agoI can do 48A @ 240V with my wall connector. It's also very convenient.
- thechao 5mo agoI do as well with a NEMA?
- grosswait 5mo agoI don’t think the mobile charger allows more than 32A continuous over NEMA, even on a 50A receptacle
- MiscIdeaMaker99 5mo agoI can confirm this. Our Model 3 doesn't charge as fast using a NEMA 14-50 plug connected via the Tesla-provided mobile charger. When we moved to a new house, we bought a Tesla wall charger, and it indeed charges at higher amps, but I don't know if the extra speed has necessarily been worth it since we primarily charge the car overnight.
- bluGill 5mo agoThere are a lot of different mobile chargers, if you don't like the specs on the Tesla charger buy a different one. Though do beware that cheap 50A receptacles cannot handle 50 amps continuous. They are for stoves (max 40A), or welders (low duty cycle since you spend more time in setup then welding - assembly lines use better receptacles)
- neither_color 5mo agoBreaker size =/= charging speed. Breakers are oversized for safety reasons. The Wall Connector is on a 60A breaker and charges at 48A. NEMA 14-50 outlets are on 50A breakers but can't charge your car at 48A. 40 iirc, and the mobile connector that comes with the car maxes out at 32A. I've had both setups and whether the full amperage charger is worth it or not depends on your use case. If you're just going to plug it in overnight, it doesn't matter. It's about an hour's difference for a top up. If you're going to wait for your car to charge and unplug it because you share the charger or have to run an extension over a public sidewalk, then the faster speed is worth it.
- spacebanana7 5mo agoOne thing I'm really scared of is EV charger software being modified by users, hackers or bugs to pull max power at times that don't suit the grid. In the UK, for example 10 million EVs all pulling 7kw would overwhelm the roughly 70GW potential of the grid. Even a million EVs charging at an inconvenient time could add a 7GW draw which is enough cause a problem.
- deleted 5mo ago[deleted]
- braiamp 5mo agoIt will first damage the batteries very fast, second, most users don't want to mess with that, they want to plug and play. So, on both counts your fears are misplaced.
- spacebanana7 5mo agoIn the event of an internet outage, wall box chargers are legally required to default on. In practice most chargers interpret this as taking the full 7kw - whether this is a bug or misreading of the intent of the law doesn't really matter from the perspective of the grid. Large ISP outages that affect millions of people are not uncommon on a decade by decade basis, and I suspect an uncomfortable number of UK EV chargers are in some way linked to eu-west-2. [1] https://www.legislation.gov.uk/uksi/2021/1467/regulation/7/made https://www.legislation.gov.uk/uksi/2021/1467/regulation/7/m...
- alt227 5mo agoIt sounds like a genuine attack vector to me. If someone hacked say teslas firmware supply chain and made all chargers pull max power at the same time, it could be a national infrastructure crippling attack.
- throwway120385 5mo agoWhere would they dump the power? You need a load of some sort. 7kW requires a voltage drop between a hot and a neutral. If it's a 1V drop then you're going to get a hot load of amps.