Separate meter and electricity tariff for air-to-water heat pump sensible?

And how do you want to do that with a meter? Assumption, 7250 kWh per year. How is the distribution between household/ heat pump?

Internal electricity meter of the heat pump? That is sufficiently accurate for that.

We let everything run through one meter for the time being.

Internal electricity meter of the heat pump? That is accurate enough for that.

I would have thought now that everything runs through our normal electricity meter. I could not identify an electricity meter inside the heat pump.

Internal power meter of the heat pump?

Our VWS only shows the amount of heat generated. (Considering the progress of heat pumps in recent years, it’s already a "museum piece".)

Our VWS only shows the amount of heat generated.

Oh, then it must be old ;-)
Does the electricity for the heat pump also come from the hamster wheel? ;)

Some network operators also require that a separate meter must be installed.

Maybe we let the first year run with a meter to accurately check the consumption and then decide again.

That is exactly the right decision. See how much the heat pump consumes in heating mode without a separate tariff/meter. Optimize the heat pump in the 2nd year, and by the 3rd year you can calculate, based on consumption and experience, whether a separate tariff/meter is worthwhile.