[janfoeh]

I know nothing about US 240V power circuits — what plugs do you use, could you get by with a Euro system?

I use Eve Energy smart plugs, which seems to be supported in Home Assistant through the matter integration. Local first, no bullshit remote account requirements, good quality, around 40€ / USD 45.

https://www.evehome.com/en/eve-energy

[jnovacho]

I believe that US 240V is 2 hots, neutral, and ground. EU 240V is one hot, one neutral and ground. EU 400V (380V) is 3 hots, neutral and ground.

None of this is cross-compatible.

[MisterTea]

> I believe that US 240V is 2 hots, neutral, and ground.

Correct. Its called split phase, a 240V transformer is center tapped and that tap is grounded to create the neutral. Either end of the transformer to neutral is 120v and end to end is 240V.

> EU 400V (380V) is 3 hots, neutral and ground.

Three phase 230/400: 400V is line (hot) to line with 230V line to neutral. More for industrial use but I hear some homes can have this service for whatever reason.

> None of this is cross-compatible.

Not really. A 230/400 volt system also supplies 230v single phase. A 230 volt European device will work fine on 240V split phase unless it has a motor which will run faster on 60 Hz which could overload it. Though I have a machine with a three phase 380 volt 50 Hz motor running happily on 230/400 60 Hz from an autotransformer supplied by 120/208 60 Hz. Just runs 20% faster.

[orangewindies]

> > EU 400V (380V) is 3 hots, neutral and ground.

> Three phase 230/400: 400V is line (hot) to line with 230V line to neutral. More for industrial use but I hear some homes can have this service for whatever reason.

It varies from country to country in Europe. In the UK you'll almost never find 3-phase in a home, in Sweden even apartments usually have 3-phase supply. In my Swedish apartment the only thing connected to more than one phase is the induction hob.

[janfoeh]

Pity - thank you!

[ThatMedicIsASpy]

Or just pay 10€ for an ikea plug (INSPELNING). I do not understand people always paying a x10 premium for eve.