Good morning,
Yesterday, we received a quote for a photovoltaic system. Our construction of the single-family house will start in October 2023 and is expected to be ready for occupancy in September 2024.
We have an annual electricity consumption of about 3000 kWh for our household, plus an unknown amount for the air-to-water heat pump (Weishaupt Biblock).
Our roof is oriented exactly south with a 25° pitch (gable roof). According to the calculation in the quote, the entire south roof is fully covered with modules (20 units), and the north roof is also equipped with 5 modules.
Attached you will find the details of the quote. The price is €20,900 net with battery storage and €15,900 net without storage.
What do you think of the offer? From what I understand in the discussions here on the forum, it is advisable to skip the battery storage. That would bring the cost to just under €16,000, which is a bit over €1,600 per kWp. That seems relatively expensive, doesn’t it?
Thank you very much in advance for your help.
Best regards,
Elias
Yesterday, we received a quote for a photovoltaic system. Our construction of the single-family house will start in October 2023 and is expected to be ready for occupancy in September 2024.
We have an annual electricity consumption of about 3000 kWh for our household, plus an unknown amount for the air-to-water heat pump (Weishaupt Biblock).
Our roof is oriented exactly south with a 25° pitch (gable roof). According to the calculation in the quote, the entire south roof is fully covered with modules (20 units), and the north roof is also equipped with 5 modules.
Attached you will find the details of the quote. The price is €20,900 net with battery storage and €15,900 net without storage.
What do you think of the offer? From what I understand in the discussions here on the forum, it is advisable to skip the battery storage. That would bring the cost to just under €16,000, which is a bit over €1,600 per kWp. That seems relatively expensive, doesn’t it?
Thank you very much in advance for your help.
Best regards,
Elias
Exact orientation – 40° and +140°, so southeast and northwest. The solar installer says the 10 kW inverter is sufficient.
It costs 690 € in the offer. Still considering whether to have it installed. But it will be supplied initially.
RotorMotor schrieb:
Therefore, in my opinion, you can save yourself the nearly 1000€ for the Sunny Home Manager?!
It costs 690 € in the offer. Still considering whether to have it installed. But it will be supplied initially.
R
RotorMotor23 Jun 2022 11:18Neubau2022 schrieb:
Silly question. Why is it then limited? I always thought the surplus is fed directly into the grid. "Single-family house photovoltaic systems" are allowed to feed in a maximum of 70% of their kWp.
You can operate systems so-called "soft," meaning you can still consume the remainder yourself.
However, with the inverter planned here, that is not possible.
i_b_n_a_n schrieb:
The orientation was:
"NRW 46562, 8 kWp southeast almost south, 4.2 kWp northwest almost north"
Even with 14.4 kWp now, I don’t see any significant losses despite the 70% soft limit – or am I mistaken? What do you mean by "despite soft"?
Did you mean "despite hard"?
But yes, with that orientation, 70% hard limiting should still be fine.
Malz1902 schrieb:
So southeast and northwest. The solar installer says a 10 kW inverter is enough. That might be true. Has it been simulated, calculated, or is that just a gut feeling?
Malz1902 schrieb:
Costs €690 in the offer. Still considering whether to have it installed. But it will be delivered first. Gross or net? Already some money for a gadget. ;-)
But at least it’s a nice gadget that might also encourage you to optimize your consumption.
RotorMotor schrieb:
...
What does "despite soft" mean?
Did you mean "despite hard"?
For orientation, 70% hard should still be okay
...Thank you for the correction, that’s exactly what I meant, but I’m not so familiar with the topic anymore (my system is running anyway ;-) )RotorMotor schrieb:
That might be true. Did he simulate or calculate that, or is it just a gut feeling?
Gross or net? Still money spent on experimentation. ;-)
But at least it’s a nice experiment that might encourage optimizing consumption.calculated and the price is netas I said, it’s not yet decided whether I will have it installed; if it’s not installed, it won’t be charged
N
Neubau202223 Jun 2022 11:36RotorMotor schrieb:
"Single-family house photovoltaic systems" are allowed to feed in a maximum of 70% of their kWp capacity.
It is possible to operate these systems in a so-called "soft" mode, which means that additional self-consumption is possible.
However, this is not an option with the inverter planned here. I still don’t understand. With a battery, less energy is fed into the grid because more is consumed on site.
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