Hello,
I would like to ask if anyone has experience with a QNG 40 house featuring a 4 kWp photovoltaic system, a 5 kW battery storage, and a heat pump? My question is how much additional electricity needs to be purchased. It is a household of four people. Or what your annual electricity bill is? The house is a KfW 40 QNG or something similar.
The home seller says we would have to pay about 100 euros (around 110 USD) extra per month for electricity. That seems a bit low to me, especially in winter.
We use electricity for household consumption, hot water, and heating for four people, and possibly an electric car as well.
Thank you.
I would like to ask if anyone has experience with a QNG 40 house featuring a 4 kWp photovoltaic system, a 5 kW battery storage, and a heat pump? My question is how much additional electricity needs to be purchased. It is a household of four people. Or what your annual electricity bill is? The house is a KfW 40 QNG or something similar.
The home seller says we would have to pay about 100 euros (around 110 USD) extra per month for electricity. That seems a bit low to me, especially in winter.
We use electricity for household consumption, hot water, and heating for four people, and possibly an electric car as well.
Thank you.
K
KarstenausNRW6 Dec 2023 13:03Everything I write always includes hot water. Now you need to start doing some calculations yourself. You received all the necessary information in my last post. So you should be able to come up with a range—you'll have to do that yourself from now on.
P.S. Your water consumption is really high.
P.S. Your water consumption is really high.
W
WilderSueden6 Dec 2023 13:28dajotech schrieb:
880 kwh district heating.Is that really correct? That seems extremely low to me, especially for an apartment housing 4 people. If that is accurate, your neighbors must be sharing their heating with you significantly, and you should expect a much higher consumption in your own home.WilderSueden schrieb:
Is that really correct? That seems extremely low to me, especially for an apartment housing four people. If that is true, your neighbors are significantly heating for you, and you should expect much higher costs in your own home.I’ll share my cost statement from 2022.
We have underfloor heating and live on the ground floor.
1. I am 98% sure that the billing is incorrect, or you are managing with a room temperature of 16°C (61°F) and heating through your neighbors (aka freeloading).
2. No one can answer that question for you. Only you know how hot, how often, and how long you shower or bathe.
Regarding point 2, there are datasheets available from shower manufacturers. With a little research, you can figure out how much energy you need to heat the water to your desired temperature. Using a coefficient of performance of 3, you can then calculate the electricity consumption.
2. No one can answer that question for you. Only you know how hot, how often, and how long you shower or bathe.
Regarding point 2, there are datasheets available from shower manufacturers. With a little research, you can figure out how much energy you need to heat the water to your desired temperature. Using a coefficient of performance of 3, you can then calculate the electricity consumption.
W
WilderSueden6 Dec 2023 15:12dajotech schrieb:
I’m sharing my cost statement from 2022.That’s just 9.4 kWh per square meter (10.4 per square yard) of heat per living area, mind you. For comparison, my energy consultant calculated an electricity demand of 12.4 kWh per square meter (13.0 per square yard) for my building envelope, built to 1940s standards. On top of that comes the annual performance factor of the heat pump, and this is based on the larger usable building area.WilderSueden schrieb:
That is just 9.4 kWh/m² (0.87 kWh/sq ft). Heat per living area, mind you. For comparison, my energy consultant calculated an electricity demand of 12.4 kWh/m² (1.15 kWh/sq ft) for my 1940s building envelope. On top of that comes the annual performance factor of the heat pump, and this figure relates to the larger usable building area.Hello WilderSueden,
for 2021, we also have a similar cost statement.
According to the cost statement, our current apartment is 93 m² (1,001 sq ft).
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