the amount of electricity consumers grows constantly in my home. We try to avoid any local burning of climate damaging gas or oil (Clearly we have to “hope”, that the overall generation of electricity will be 100 % CO2-neutral in a near future).
We have this type of consumers:
- Normal electrical houshold-consumers (washing maschine, dishing machine, TV ans so on)
- Heat pump for heating the rooms
- Electrical car
- Instantaneous water heater (Durchlauferhitzer) for warm water (e.g. shower)
At some point in time, all the consumers are on at the same time. Then, the power, that my house consumes is getting very big.
Especially the Instantaneous water heater needs a high amount of electrical power, for quite a short time. This time is also not very good predictable, because the people can take a shower at every time of the day.
For the other consumers, this usage time can be managed.
I want to be able to stop the Heat pump and the charging of the Electrical car, when the Instantaneous water heater starts.
Therefore I need an instantaneous water heater, that gives me a signal (via MQTT?) when it starts up. Then I could set up an automation and pause the heat pump and the charging of the Electrical car while someone is having a shower. This would limit the power usage of my house, based on rules.
Does anyone know, which Instantaneous water heater can give me such a signal? Or that can give more signals, e.g. the current power, the used energy and so on?