Is an extra meter necessary for the heat pump if a photovoltaic system is present?

Yes, the measurement concept must be enabled by the grid operator. It has nothing to do with the electricity tariff.

Thank you, network operator. That word was missing for me.

Hi,

What do you think of the solution with two meters, where you take the heat pump electricity tariff and at the same time operate the heat pump with photovoltaics? This should already be partly possible.

not really much, because
1. this so-called cascade measurement must be supported by your distribution network operator
2. if it is supported, significant higher costs will arise for you, which may reduce the profitability of self-consumption to zero or even push it into the negative.

Then there is the rollout of smart meters
1. Since your photovoltaic system is above 7KWp, you will be forced to get a smart meter. That means about €60 instead of about €12 currently. With a cascade measurement, your heat pump will also necessarily get a smart meter due to the heat pump tariff (interruptible consumers and such as the justification)

Therefore: With a reasonably low heat demand, which is actually always the case in new buildings, the heat pump tariff will generally increase costs rather than reduce them. Because of the obligation to have smart meters, these costs will even increase in the future. Therefore, better to have just one meter right away without much discussion with the DSO, etc.

Regards Nika

Thank you for the feedback. I have decided on one meter. And another meter on a DIN rail to determine the consumption of the heat pump for the Bafa subsidy.