Looking for real-world info from wallbox owners with 1-3 phase switching

Third party integrations
1

Hi all,

I’m working on extending my EV Charge Manager (EVCM) integration with phase switching (switching between single-phase (1P) and three-phase (3P) charging) to better handle low available power / PV surplus situations.

Unfortunately my wallbox does not support phase switching and before implementing “on the fly” switching during an active charge session, I’d like to collect real-world feedback from people who own a wallbox that supports 1P/3P switching.
(I’m not looking to modify my wallbox to support phase switching)

What I’m trying to avoid when I adapt my integration, is a situation where the wallbox and the integration both try to manage phase switching and end up “fighting” each other. So I’m especially interested in how your charger behaves and what it exposes to HA.

Questions

  1. How is phase switching controlled on your wallbox?
    Is there a vendor-app option like Force 1P / Force 3P / Auto?
    Is there an API/service (local or cloud) that allows explicitly switching phases?
    If you use a HA integration for your wallbox: does it expose phase switching?

  2. Is there reliable feedback about the current mode (1P vs 3P)?
    Does the wallbox report an explicit state (e.g. “currently single-phase”)?
    Or is it more “blind switching” where you can only infer it from per-phase currents?

  3. Any recommended settings to prevent conflicts (e.g. disable wallbox auto-mode when using an external controller)?

Thanks! Any details (even if partial) are helpful—especially whether there’s explicit 1P/3P state feedback and whether switching can be externally controlled without conflicts

2

Problem is that you would need a extra contractor to enable / disable the 2nd and 3rd phase.

Bt that aside the software of the controller is indeed also important.
perhaps the " Smart EVSE v3.1 controller". has this feature for you.

3

I’m not looking to modify my wallbox to get phase switching working, I was not clear about that in my OP, sorry about that.
What I want is to add this extra feature to my integration so it can control wallboxes that support phase switching.