Hacker Newsnew | past | comments | ask | show | jobs | submitlogin

> Technology Connections did a deep dive on CCS and it seems like it's a more flexible connector with a truly open standard.

He did a video on this Connextras channel about this news:

* https://www.youtube.com/watch?v=wjny4u5THpU

While he thinks the Tesla physical connector is probably better, the CCS communications standard is better (AIUI). So once Telsa adopts that, it will probably be a good system.

Also: he's talking about CCS1, and not CCS2, which can do things like handle three-phase power.



Even in that video, Alec manages to slip in numerous disingenuous arguments, such as when he held up an adapter and suggested size parity between the (larger) female socket end of a complete NACS connector and the (smaller) male plug end of a AC-only J1772 connector.

https://www.youtube.com/watch?v=wjny4u5THpU&t=290s

More to the point, the debate isn't about NACS versus J1772, it's about NACS versus CCS1. If you compare CCS1 to NACS, the difference is substantial. This graphic is probably showing best case for NACS and the worst case for CCS1 but the connectors shown are dimensionally accurate:

https://digitalassets.tesla.com/tesla-contents/image/upload/...


Wait. CCS1 cant handle three-phase power?

I just read about it and no wonder its not that popular.

You can charge 7.4kw maximum in the US at home with CCS1.

In Europe you can charge up to 22kw without going DC.


> Wait. CCS1 cant handle three-phase power?

CCS1 = SAE J1772 + DC.

J1772 has L1, L2/neutral, ground, control pins:

* https://en.wikipedia.org/wiki/SAE_J1772

J1772 is popular where one-phase is popular in residences (i.e., US, CA). CCS2 has L1, L2, L3, and neutral+ground:

* https://en.wikipedia.org/wiki/Type_2_connector

* https://en.wikipedia.org/wiki/SAE_J3068

Technically there was nothing stopping the use of CCS2 in the US, as the L2 and L3 pins would simply not be used at people's homes. But one-phase J1772 was already around, and it was decided to go with legacy compatibility.

I'm sure CCS2 exists in more commercial settings with heavy duty EVs, e.g., Volvo Trucks:

* https://www.volvotrucks.us/news-and-stories/press-releases/2...

Though high/er capacity (DC) plugs are being worked on:

* https://insideevs.com/news/535918/megawatt-charging-system-e...

* https://en.wikipedia.org/wiki/Megawatt_Charging_System


I think in the EU its CCS2 including the tesla super charger. They have https://en.wikipedia.org/wiki/Combined_Charging_System#/medi... the left hand plug.


Level 2 can charge up to 19kW (240V at 80A) but 12kW (50A) is more common.

NACS also can't do three-phase power. Three-phase power is rare in the US, it is only found in commercial locations that need it.


How does the US get to 240v if you guys don’t have multiple phases at home?

Not an electrician, but here In Europe we get to 400v by combining the three 240v phases we get.


US power is really 240V with a neutral. It’s wired to most outlets and circuits as one 120V leg (against the neutral). But you can absolutely wire a 240V circuit using both legs and major appliances (air conditioners/heat pumps, electric driers) use 240V. My Tesla charger is on a 240V 60A circuit.


We don't have three phase but power coming into most panels in the United States has two 120V lines that are 180 degrees out of phase so that's enough to construct the 240.


Tesla start charging much much faster. Tesla communication is perfectly fine for Tesla to Tesla connection and Tesla has no need to change that.

Teslas start charging within 5-8s, CCS often take 30s to start charging.

Tesla will follow the standard for other cars, but I hope they improve on the implementation.




Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: