ᐅ How important is a "traditional" roof in the era of photovoltaic systems?
Created on: 6 Nov 2024 09:29
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tempusfugit
Hello everyone,
Our construction project is currently being reviewed by the architect, but I would be very interested in the forum members’ opinions regarding the upper part of the house.
The house (bungalow) faces almost directly south and will have a roof pitch of about 20 degrees. The total roof area is approximately 14 x 14 meters (46 x 46 feet) with a gable roof, and there is no shading from neighboring buildings or similar. Given the affordable solar panels and energy storage options, a full coverage with solar panels makes sense (heat pump, electric car, home office).
Now the question is, how up-to-date is a traditional roof covering with clay tiles beneath the solar panels?
What options would there be if one plans to build an insulated roof with photovoltaics in 2025, prioritizing the most economical solution?
Our construction project is currently being reviewed by the architect, but I would be very interested in the forum members’ opinions regarding the upper part of the house.
The house (bungalow) faces almost directly south and will have a roof pitch of about 20 degrees. The total roof area is approximately 14 x 14 meters (46 x 46 feet) with a gable roof, and there is no shading from neighboring buildings or similar. Given the affordable solar panels and energy storage options, a full coverage with solar panels makes sense (heat pump, electric car, home office).
Now the question is, how up-to-date is a traditional roof covering with clay tiles beneath the solar panels?
What options would there be if one plans to build an insulated roof with photovoltaics in 2025, prioritizing the most economical solution?
- Traditional roofing first, then adding the solar mounting system?
- Sandwich panels or even roofing felt like in the USA, with solar panels mounted on top?
- Integrated/in-roof solar modules like SunRoof (probably the most expensive solution)?
H
hanghaus20237 Nov 2024 12:3411ant schrieb:
In my opinion, a module doesn’t need a "double bottom" but should be able to fully take on the role of the roof covering. So far, hardly anyone can do that. Show an example of a good solution with standard modules.
hanghaus2023 schrieb:
Almost no one can do that well so far. Show an example of a good solution using standard modules. Exactly. They are quite rare, due to failures ranging from Bangemann to Rexrodt, which are now having consequences. By 2040, we might end up buying back the Transrapid, poor Germany. Let's hope the market will resolve this.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
tempusfugit7 Nov 2024 17:0911ant schrieb:
What does it mean that they are "reviewing" the construction project? Yes, at the moment it is about clarifying some details where the development plan is somewhat unclear before the building permit / planning permission is applied for (roof geometry, buildable area, etc.).
P.S.: 27/09 - I want to build a roof, not a runway.
tempusfugit schrieb:
P.S.: 09/27 - I want to build a roof, not a runway. Answering the question of how exactly south your southern orientation is could still be helpful.
tempusfugit schrieb:
Yes, right now we are clarifying some details where the development plan is somewhat unclear before submitting the building permit / planning permission application (roof geometry, buildable area, etc.). This should be clarified as part of the preliminary building inquiry, that is, not before design phase 4 but before design phase 2, since it already affects design phase 3.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
H
hanghaus20237 Nov 2024 19:55Simple answer: Deviation of S in degrees.
hanghaus2023 schrieb:
Almost no one has managed this so far. Please show an example of a good solution with standard modules. This summer, I installed a “Viridian” in-roof system with 44 modules together with some friends. The system is well-designed and, in my opinion, completely watertight. The panels are mounted directly onto the battens, and the panels are connected using metal sheets that fit into a rubber lip on the module.
Still, I see three disadvantages:
1. Ventilation:
With the roof covering, it was noticeable that the air under the panels heats up significantly, creating a strong chimney effect. Some of the hot air escapes through the row of tiles above and the ridge capping, but certainly not as much as with panels in a “traditional installation.”
2. Thickness of the solar panels:
The panels feel thin, and I’m not sure if they could withstand hail.
3. Replaceability of individual modules:
Due to the metal sheet connections, the panels have to be installed and removed in a specific order. Replacing single damaged panels is only possible with great effort.
I’m really curious about long-term experiences.
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