Wire gauge (AWG) for HPWC (Telsa Wall Connector)

[gilscales]

While I might have an electrician come and run the wires and hook it up, I want to run the conduit because I need to send it behind a partial wall and I am also picky on how things are run in my house...LOL

Here is what I want to do....let me know if I'm crazy.

Have about a 40' straight run from one side of the house to the other in the basement. I want to run 1" conduit from the panel to the other end of the house to a box. Run 3- #4 wires and a ground (future proof with a neutral if ever needed). then at the box switch to a 3/4" conduit to punch to outside and to the wall adapter outside. I will then cap the neutral in the box and run the 2- #4 and a ground out to the wall connector.

Before you run the 1", check your fill percentage, you do not want to be over 40% as this is the max with any conduit running 3 wires or more, also pulling the wire will be much harder, looks to me like you'll want 1 1/4" for sure, you can use this online conduit fill calculator to check
Conduit Fill Calculator - Best Online Conduit Fill Calculator