Cold local heat with ground source heat pump

Hello everyone,

I hope you can help me. In our development area, there will be a cold local heating network, where the energy supplier supplies the heat pump in the house via deep drilling and a connected ring main network.

We were now considering integrating a photovoltaic system to supply the heat pump with self-produced electricity. So far, so good! Today we received a letter from the energy supplier stating that, for billing reasons, it is not possible to use the self-produced electricity for the heat pump.

Here is the original wording:
„As you have correctly understood, for billing reasons, the entry of self-generated electricity from a photovoltaic system is not feasible. By feeding it into the system through us, there would additionally be the disadvantage that the full Renewable Energy Sources Act surcharge would apply to all the electricity, so the advantage of self-generated electricity would no longer be fully given.“

Has anyone heard something similar before? Is it really not possible?

Then a photovoltaic system almost no longer makes sense. And nowhere in the contract conditions does it state that self-produced electricity cannot be used for the heat pump.

Thanks in advance!

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Heat sold to third parties via self-generated electricity is simply not subject to the Renewable Energy Act! It is heat, not electricity. That's just how the bastards of the energy producers are. Of course, I am not a lawyer, but if it is not stated in the contract? How do they want to technically prevent that? Are they only now realizing that electricity from property owners' photovoltaics is not good for business?

The provider supplies you with the water for the heat pump, and the heat pump is powered via your electricity grid?

Is it true that this is not possible?

Who owns the heat pump? Supplier or customer?

Such a coincidence - we just had an info session about this development area with this technology ;) I guess I know where you are building...

So the supplier can forbid you from supplying the heat pump with your own electricity, as it would make it unprofitable for them. Somehow they have to recoup the enormous costs of building the system. They have to be able to count at least on the electricity for the heat pumps.
What they cannot forbid you, however, is to use the photovoltaic electricity for the "normal" consumption in the house. So photovoltaic is worthwhile then.
Do you want a battery for it?

We had been considering integrating a photovoltaic system in order to supply the heat pump with the self-produced electricity. So far so good! Today we received mail from the energy provider stating that, for billing reasons, it is not possible to use the self-produced electricity for the heat pump.

Does the heat pump necessarily have its own meter / tariff at your place? Because there must be a complete separation of household electricity and heat pump electricity.