ᐅ Commissioning of a 9.3 kWp system combined with an air-to-water heat pump and mechanical ventilation with heat recovery

Hello everyone!

Our house is almost finished on the outside, and the photovoltaic system was installed last week. Now, as part of the electrician’s work, we are trying to figure out the most efficient way to connect everything profitably.

Here are the key details:
South-facing orientation with 9.3 kWp (kilowatt peak), expected annual yield around 9,000 kWh (kilowatt hours)
No battery storage
We want to use as much electricity ourselves as possible and feed the surplus into the grid.
A Viessmann air-to-water heat pump and a mechanical ventilation system with heat recovery will be installed.

Now, my question is: What makes the most sense? Should everything run through a single meter? Two separate meters? Or like shown in the pictures attached?

Best regards

Well, it depends. We chose a meter because the heat pump rates from the providers here are hardly any cheaper than the regular rate.

What are your basic specifications? And maybe you can share some information regarding your consumption/production?

So, do you have a two-way meter for everything and nothing else?

Photovoltaic system with 9.3 kWp, air-to-water heat pump, and controlled residential ventilation. I cannot comment on consumption yet, as we have only recently moved into the house. Roughly estimated, it should be between 6500-7000 kWh.

We have a bi-directional meter installed.

So, you only have a two-way meter for everything, nothing more, correct? That would also be my preferred option. During the day, when the sun is shining, feed everything into the air-to-water heat pump and the consumers, and if there is still surplus available, then feed it back into the grid.

Just out of curiosity, which air-to-water heat pump and controlled mechanical ventilation system do you have? And which inverter?

Yes, exactly.

We have an Alpha Innotec LWAV82r1/3 and a Zehnder controlled residential ventilation system. The inverter is an SMA Tripower 10.0.