What do the bottom circular parts of fast charger ports on car get covers?

What do the bottom circular parts of fast charger ports on car get covers?


The earlier post about the equinox ev made me ponder this when I was looking at the pictures.


Most EVs tend to put a little rubbery cap on those bottom ports…but nothing on the circular “level 2” j1772 ports towards the top.

Why is this?

Why is one part perceived as needing a cap?

Thank you.

View Reddit by TurkeyLettuceTomatoView Source

Read it Too  Lordstown Motors has 24 VINs reported at this website https://dot.report/vehicle/lordstown/endurance/2023. Does it mean they are production vehicles? The numbers look like it is increasing.

13 thoughts on “What do the bottom circular parts of fast charger ports on car get covers?

  1. The port door protects the entire port from the elements. When you are L1/2 charging the j1772 port is sealed by coupling with the charger, but the DC pins would be exposed. So they require a separate cover to protect them from the elements when AC charging.

  2. The J1772 connector only uses the top, but the CCS connector uses the whole thing. The point of the cover is to protect the bottom ports while only the top is in use. Since there’s never a time when the bottom ports are in use but not the top, there’s no need for one for it.

  3. Some cars do have covers over both sets.

    My old BMW i3 had a pair of crappy little plastic [caps](https://upload.wikimedia.org/wikipedia/commons/3/3e/2021_BMW_i3_charging_inlet_port_03_2022_4742.jpg) – one for the J1772 part, a separate one for the DC CCS part.

    Car makers cover the port(s) because they don’t want debris getting in there and possibly messing up your connection.

    Some put it only on the DC pins because for most people, the DC pins are used less often – they’ll charge using J1772 at home most of the time. So for most use, when the main “outer door” is open, the J1772 pins are “covered” by being plugged in. But if the outer door is open, and a J1772 cable is plugged in, but the lower DC pins were exposed, those would be open to debris every time you’re just J1772 charging.

  4. Importantly for this thread – Tesla does not do this on its CCS2 cars (in Europe, Australia, NZ).

    Not sure if that means the reasoning others mentioned (protecting the DC pins during AC charging) is incorrect, or if Tesla have just been lazy with the design. Either way, I’m not aware of anyone (including myself) having issues due to the lack of DC flap.

  5. I was in Coeur d’Alene, ID and saw a guy pouring denatured alcohol into the ports and asked why. He had an outside J1772 charger at home. He had cut the covers as they were a nuisance. Snow had gotten into the ports and the plug would not seat correctly.

  6. I’m not a Tesla stan (and I don’t have one) but this is one advantage of Tesla’s charging port. There’s never a part of it that isn’t being used and is exposed to the elements.

    In my car (Kona) there’s a door for the whole charging port, then separate plastic plugs for the J1772 part and the DC pins. A bit annoying to have multiple things to take off, but it’s not that bad.

Leave a Reply

Your email address will not be published.