Hello everyone,
I hope you can help me. In our development area, there will be a cold local heating network, where the energy provider supplies the heat pump in the house through deep drilling and a connected ring main network.
We have been considering integrating a photovoltaic system to use the self-generated electricity to power the heat pump. So far, so good! Today we received a letter from the energy provider stating that, for billing reasons, it is not possible to use the self-generated electricity for the heat pump.
Here is the original wording:
“As you have correctly understood, for billing reasons it is not feasible to register self-generated electricity from a photovoltaic system. By feeding it into the system through us, there would additionally be the disadvantage that the full Renewable Energy Act surcharge would apply to all electricity, so the benefit of self-generated electricity would no longer be fully realized.”
Has anyone heard of something similar? Is it really not possible?
If that is the case, a photovoltaic system almost doesn’t make sense anymore. The contract conditions do not state anywhere that self-generated electricity cannot be used for the heat pump.
Thank you very much in advance!
I hope you can help me. In our development area, there will be a cold local heating network, where the energy provider supplies the heat pump in the house through deep drilling and a connected ring main network.
We have been considering integrating a photovoltaic system to use the self-generated electricity to power the heat pump. So far, so good! Today we received a letter from the energy provider stating that, for billing reasons, it is not possible to use the self-generated electricity for the heat pump.
Here is the original wording:
“As you have correctly understood, for billing reasons it is not feasible to register self-generated electricity from a photovoltaic system. By feeding it into the system through us, there would additionally be the disadvantage that the full Renewable Energy Act surcharge would apply to all electricity, so the benefit of self-generated electricity would no longer be fully realized.”
Has anyone heard of something similar? Is it really not possible?
If that is the case, a photovoltaic system almost doesn’t make sense anymore. The contract conditions do not state anywhere that self-generated electricity cannot be used for the heat pump.
Thank you very much in advance!
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DaniMartinez26 Feb 2021 09:33nordanney schrieb:
Then you’re out with your photovoltaic electricity. The energy supplier sets the conditions.
So photovoltaic for self-consumption (household) is possible, but not for the heat pump. So what. For a relatively low amount of money, you can get a geothermal heating system. Be happy about that.
P.S. With photovoltaic electricity and the heat pump, you wouldn’t have made much money anyway. You’ll just pay about $10 more per month for external electricity (if at all). Okay, thanks for now:
Is it really a relatively low amount of money?
One-time costs: €17,500
Energy price: 5.95 cents per kWh
Basic price, maintenance, and 24/7 availability: €499.80 per year
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nordanney26 Feb 2021 09:33DaniMartinez schrieb:
This is how the system works here... a heat meter is installed behind the heat pump...! And we can get household electricity from any company we want, so apparently the electricity for the heat pump is measured separately?! I would say that you probably don’t pay for the electricity used by the heat pump itself, but rather for the heat it generates.
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nordanney26 Feb 2021 09:34DaniMartinez schrieb:
Okay, thanks for now:
Is that really a relatively small amount of money?
One-time costs: €17,500
Usage price: 5.95 cents
Basic fee, maintenance, and 24/7 standby: €499.80 per year That was before you posted the costs. I thought with the €17,500 (about $19,000) the matter would be settled and afterward you would only need to pay for the electricity for the heat pump.
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nordanney26 Feb 2021 09:35DaniMartinez schrieb:
Work price: 5.95 centsWith a factor of 4, that would be 24 cents per kWh of electricity.D
DaniMartinez26 Feb 2021 09:40nordanney schrieb:
With a factor of 4, that would be 24 cents per kWh of electricity.Where can I find out what factor is being used?N
nordanney26 Feb 2021 09:48DaniMartinez schrieb:
Where can I find out what factor is applied here? You can’t really. It depends on the heat pump, the heating system design, and on you. I simply assumed a seasonal performance factor (SPF) of 4, which is definitely achievable with geothermal energy. If the heating system is well designed, values of 4.5 to 5 are possible.
This means that from one kWh of electricity, you generate four kWh of heat. If you get five kWh from one kWh of electricity, the cost per unit of heat would be equivalent to an electricity price of 30 cents.
Paying both—for one kWh of electricity to operate the system and additionally for the cost of producing four or even five kWh of heat—would be unreasonable.
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