You can do without the intermediate meter because the function required by BAFA to determine the power consumption and heat output of the heat pump is integrated into the heat pump – at least with our Vitocal (model 333):
[ATTACH alt="Vitocal I.jpg"]65280[/ATTACH] [ATTACH alt="Vitocal II.jpg"]65281[/ATTACH]
You don’t really need a special heat pump electricity tariff if you already have photovoltaics. So one two-way meter typical for photovoltaics is sufficient, and that’s it.
Hello, thank you for your reply. I am considering whether this two-way meter solution is the right one for our project. According to your answer, a two-way meter is sufficient if photovoltaics are available. What if the photovoltaics are only installed after 2-3 years?
The electrician’s suggestion so far was to install 2 separate electricity meters. However, when installing photovoltaics, only 1 electricity meter would be needed. Therefore, I wonder why install 2 meters now and whether that makes sense? My main question is, what should I have installed now (measurement of normal electricity and heat pump electricity) and for later in 2-3 years (with additional photovoltaics) to be well prepared? I am completely at a loss here.
P.S., we will get the Nibe S1255-6 S/W brine heat pump.