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Comment by ggreer | Hacker News Reader

I doubt there will be any noticeable difference. NACS's communication protocol is the same as CCS, and adapters exist in both directions.

NACS's plug is smaller because the primary pins support both AC and DC. CCS uses separate pins for AC and DC. Also NACS locks the cable on the car side while CCS locks on both sides. That means with CCS, a malfunctioning cable can strand your car.

The main downside of NACS is that it doesn't support three-phase, but neither does CCS1, which is the version of the CCS standard used in North America and Japan (where household three-phase is rare). Europe uses CCS2, which is an even larger connector than CCS1 (due to the extra pin needed for three-phase).

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A communication protocol is different from what is being communicated and what extensions might be implemented or discovered for the purpose of fingerprinting vehicles or models of vehicles.

For example, a robust PKI might make car theft just a bit harder. Or maybe if you farm kiwis you won't be able to charge your car anymore.

ISO 15118 outlines an ecosystem of digital certificates that need to be in place for Plug & Charge to work. This is where public key infrastructures (PKIs) come into play. A PKI is a tree-like, hierarchical structure of trusted third parties called certificate authorities (CAs). These CAs manage the creation, storage, distribution, and revocation of digital certificates.

https://www.switch-ev.com/blog/basics-of-plug-and-charge

> Also NACS locks the cable on the car side while CCS locks on both sides. That means with CCS, a malfunctioning cable can strand your car.

I'm just surprised they didn't consider when designing the standard that they're putting a critical moving part on the component most subject to handling and damage.

Public charging connectors get just beat up from constant handling from lots of different people, many of whom couldn't care less about the next person to use it.

Yes, CCS is the worst of the charging standards and Americans are fortunate that the government didn’t mandate it. Thanks to EU legislation, Europeans are now stuck with a comically huge connector that can leave them stranded if they get an unlucky cable. It’s the cookie banner of charging standards.

> The main downside of NACS is that it doesn't support three-phase

The other current downside is it doesn't support up to 1,000V like CCS does, which matters for the currently deployed 800v EVs out there. There's a revision to NACS to support this but it's not currently in the wild yet afaik. That's the next generation of superchargers

I believe the revision you are talking about already exists. See page 13 onwards of https://digitalassets.tesla.com/tesla-contents/image/upload/...

I think the 1000V support predates the full NACS release.

Two extra pins. Apart from control pins, Type 1 and NACS have live, neutral and ground. Type 2 has phase 1, phase 2, phase 3, neutral and ground.

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