Hello, I do not speak German so here is my message in English, I hope you can help me. I have a Vitocal 222-S AWT 221.A04 heat pump (year 2017). I have a photovoltaic installation with Enphase microinverters. I want to optimize the use of surplus electricity produced by photovoltaics. In the heat pump user manual there is a “Photovoltaic parameter group” part (7E00 to 7E25), and a “Smart grid parameter group” part (7E80 to 7E93). I saw that there is a Viessmann energy meter to be connected by modbus to the heat pump. Is this the only solution for my heat pump model or are there other solutions? I saw that the Viessmann modbus energy meter exists in 2 versions. Single-phase and Three-phase. At home my electrical installation is completely single-phase (usual in France). Do I absolutely have to choose the Single-phase energy meter model, or will the three-phase one also work even in a single-phase electrical installation? Indeed, currently my electrical installation consumes at certain times up to 60A (including 32A for charging my electric car). However, the single-phase meter seems to support only 32A, while the three-phase model supports 60A.
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