Costs for heat pump, water, and electricity

Hello everyone,

I hope this topic is somehow correctly placed here or at least in this forum. I am a new property manager and have a problem with the billing of electricity, water, and heating electricity. I have attached a picture where all the values are listed. The building consists of 4 residential units (Residential Unit-1 to Residential Unit-4). Can someone tell me how I calculate the costs for the individual residential units? Calculating the costs for the total water consumption is not a problem, but for example, electricity is needed to heat the water. However, there is no warm water price/m³. So how do I calculate the electricity costs for warm water heating for each residential unit? In addition, there is a general electricity meter connected to the heat pump and, for example, the hallway light or the light in the bicycle storage room. How is it with the electricity consumption for the electric auxiliary heater and compressor? It is not reflected on the general electricity meter, which I actually expected. So I don't quite get it. Maybe I am overlooking something and someone can help me. Many thanks and best regards

Hello, there are common court rulings. We have agreed with the co-owners on 18% of the heat pump for heating the hot water.

Where do the different values for heating come from? I suspect that the values for the heat pump come from the heat pump and refer to thermal energy. However, many heat pumps also have an internal electricity meter...

The respective values for the residential units are separate electricity meters, but if there is only one heat pump connected to one meter, how do separate values for heating come out if the heat pump is connected to only one meter? From my point of view, the split would only be possible if there was a separate heat quantity meter at each residential unit, but then the values at the residential units would have to be higher (since thermal energy) than the sum at the electricity meter of the heat pump. That the common electricity is on the same meter as the heat pump is of course bad. Because then you can only allocate the common electricity proportionally to the heat consumption of the units, which surely makes no sense (whether legal, no idea).

By the way, the high proportion of energy from the electric auxiliary heater is an indication of a poor setting of the heat pump.

How I would do it, under the premise that the separate data for heating for the residential unit is correct. Take the total electricity bill. Deduct the basic fees and distribute either according to ownership shares or per unit (depending on the [WEG contract]). Do the same with common electricity, if somehow separable. Then calculate direct electricity units * working price and deduct from the total. Finally, distribute the remaining amount proportionally according to heating share.

But it depends a lot on where exactly the values come from...

From my point of view, the splitting would only be possible if a separate heat meter were installed on each residential unit, but then the values on the residential units would have to be higher (due to thermal energy) than the sum at the electricity meter of the heat pump.

Thank you very much in advance for your help. The different heating values actually come from separate heat meters. The rest comes from the respective electricity meters and water meters of the respective residential units. What do you mean by the values then having to be higher? There is an overall heat meter on the heat pump, which in total corresponds to the separate heat meters (I have checked this). In addition, there is another meter on the heat pump labeled "Warmwasser," so presumably hot water. What can I do with this meter or do I need it for the billing? It would probably help me a lot if someone could provide an example calculation for one residential unit. What do I do with the hot water volumes in m³? Do I also have to somehow account for them?

Important additional info to avoid confusion: The values "2070" and "2321" for general heating come from the meter on the heat pump for hot water. I would like to attach the Excel file for simplification, but unfortunately, it is not allowed here in the forum.

hmm somehow the whole thing seems confusing.

If the value Allgemein from the table with the residential units comes from the heat pump. Where do the values from the table Wärmepumpe then come from?
The values under Heizen come from the heat quantity meters of the residential units?
You need to make sure what is electricity consumption and what is heat quantity (both in kWh).
Normally, a heat pump should have more heat quantity than electricity consumption.