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Comment by 486sx33 | Hacker News Reader

Why would I want to hack the bootloader for a wall charger? Asking for a friend

You 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.

I 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.

Can confirm. I've used an adapter to charge 2 different non-Tesla cars off my wall connector.

I use my Gen 1 Tesla Wall Connectors to charge my NACS-native Lucid Gravity.

There 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.

Really 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.

They 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.

A 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-adapt...

If you’re using the same adapter successfully at a supercharger, you have the wrong adapter for AC (level 1/2) charging.

> 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.

J1772 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.

277 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.

What vehicle restrictions? This is for the Tesla home charger, not Superchargers.

Exactly. Charge both my Tesla and my leaf with mine.

Older 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.

Some don't support j1772 adapters with non Tesla vehicles

Publicly 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.

Implement your own payment provider

To play doom on it?

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