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
D
Deliverer22 Apr 2022 09:48Yep. Skip the storage battery and instead fully utilize the north-facing area, or at least fit a full string (usually around 20 modules). With such a low roof pitch, this makes sense. Also, make sure no satellite dishes, vents, or similar items are planned in the module area.
The biggest cost saving comes from installing the mounting hooks during the roof sheathing. This definitely needs to be ordered in time. Doing it after the roof is finished will take a lot more time.
Even cheaper would be to cover the roof with metal sheets instead of tiles. You won’t see it under the modules anyway. The metal roof lasts longer, is more watertight, tiles won’t break, the roofing cost is lower, and the photovoltaic installation is easier.
Currently, prices around €1300 per kWp (around $1400 per kWp) can be achieved for systems from 15 kWp upwards. That’s for existing buildings, so new builds should get around €1000 to €1100 per kWp ($1100 to $1200 per kWp). No scaffolding needed, the electrician is already there, savings on the roof... These price figures are not hearsay, I have a two-week-old offer on the table (around €1300 per kWp for existing buildings) from an expensive area in Baden-Württemberg.
If the roof will be covered by the end of this year, definitely place the order now! Nothing will get better by waiting, and you have to hope everything arrives on time.
And then it doesn’t matter when you move in. Once the PV system is connected and the distribution panel is fully installed, it can start operating. This already helps with the underfloor heating curing process! You just have to make sure the electrician is instructed accordingly...
The biggest cost saving comes from installing the mounting hooks during the roof sheathing. This definitely needs to be ordered in time. Doing it after the roof is finished will take a lot more time.
Even cheaper would be to cover the roof with metal sheets instead of tiles. You won’t see it under the modules anyway. The metal roof lasts longer, is more watertight, tiles won’t break, the roofing cost is lower, and the photovoltaic installation is easier.
Currently, prices around €1300 per kWp (around $1400 per kWp) can be achieved for systems from 15 kWp upwards. That’s for existing buildings, so new builds should get around €1000 to €1100 per kWp ($1100 to $1200 per kWp). No scaffolding needed, the electrician is already there, savings on the roof... These price figures are not hearsay, I have a two-week-old offer on the table (around €1300 per kWp for existing buildings) from an expensive area in Baden-Württemberg.
If the roof will be covered by the end of this year, definitely place the order now! Nothing will get better by waiting, and you have to hope everything arrives on time.
And then it doesn’t matter when you move in. Once the PV system is connected and the distribution panel is fully installed, it can start operating. This already helps with the underfloor heating curing process! You just have to make sure the electrician is instructed accordingly...
Deliverer is the expert here and has already covered everything.
I also consider the 1600 EUR to be excessive in the current situation, especially since scaffolding and similar costs are not included or could be saved. Personally, I would immediately reject anything over 1500 EUR as “not trustworthy.” Whether things will improve in the near future is, of course, uncertain.
You still need to revise the north side. Also, take a closer look at the module alternatives and their sizes to see if a more efficient layout (south side) might be possible. We aren’t familiar with these options here…
It’s optimal if hooks can be installed during the roofing work, but it’s not a big issue if the solar installer handles this directly. Installing the hooks and setting up a 10 kWp system should be completed in one day, or at most one and a half days, right?
I also consider the 1600 EUR to be excessive in the current situation, especially since scaffolding and similar costs are not included or could be saved. Personally, I would immediately reject anything over 1500 EUR as “not trustworthy.” Whether things will improve in the near future is, of course, uncertain.
You still need to revise the north side. Also, take a closer look at the module alternatives and their sizes to see if a more efficient layout (south side) might be possible. We aren’t familiar with these options here…
It’s optimal if hooks can be installed during the roofing work, but it’s not a big issue if the solar installer handles this directly. Installing the hooks and setting up a 10 kWp system should be completed in one day, or at most one and a half days, right?
D
Deliverer22 Apr 2022 11:01netuser schrieb:
Deliverer is the expert here That actually makes me blush! 🙂 No, I’m not an expert, more of a big fan of photovoltaic systems. But I do know the basics and already have about 1 kWp installed on various roofs. So please feel free to question everything – most things can be calculated.
Avoiding hidden pitfalls with a 10 kWp system, roughly estimated, can save about one working day. That’s around 500€. Whether you can pass that cost on is another matter...
Deliverer schrieb:
Well, no, I'm not a professional, rather a big fan of photovoltaics. My life experience tells me that some "big fans" are often much more knowledgeable experts than some professionals who run the same routine program day in, day out. 😉
That’s why I referred to you as a "professional here in the forum" 🙂
Mahri23 schrieb:
One more small tip: if the system is really going to be operational this year, register it only in Jan. 23. I wouldn’t fully agree with that… with the feed-in tariff below 7 cents, I would focus more on maximizing self-consumption as soon as possible. So especially preheating the screed, etc.
In other words, don’t necessarily wait until 2023, but connect it as soon as possible.
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