Hello
we are planning a new semi-detached house.
We want to install a photovoltaic system later on.
We will get the right half shown in the photo. Orientation is southwest.
The photovoltaic system will of course be installed on the southwest side facing the garden.
The black area is the 3x5 m (10x16 ft) terrace, which will later be covered with a fixed terrace roof measuring 4 m (13 ft) deep and 5.5 m (18 ft) wide.
My question is whether it will still be possible to install a photovoltaic system on the roof once the fixed terrace roof is there?
If the terrace roof is on the southwest side in the garden, it will no longer be possible to set up scaffolding.
For maintenance or in case of problems, access to the photovoltaic system will be necessary later on (is access without scaffolding not possible?)
Or can the photovoltaic system be installed without scaffolding?
The house will have a gable roof and 2.5 full stories.
we are planning a new semi-detached house.
We want to install a photovoltaic system later on.
We will get the right half shown in the photo. Orientation is southwest.
The photovoltaic system will of course be installed on the southwest side facing the garden.
The black area is the 3x5 m (10x16 ft) terrace, which will later be covered with a fixed terrace roof measuring 4 m (13 ft) deep and 5.5 m (18 ft) wide.
My question is whether it will still be possible to install a photovoltaic system on the roof once the fixed terrace roof is there?
If the terrace roof is on the southwest side in the garden, it will no longer be possible to set up scaffolding.
For maintenance or in case of problems, access to the photovoltaic system will be necessary later on (is access without scaffolding not possible?)
Or can the photovoltaic system be installed without scaffolding?
The house will have a gable roof and 2.5 full stories.
It depends on the roof pitch. I have read that up to 25° (degrees) it can still be reasonable to have a north-facing orientation. However, the efficiency decreases significantly.
I checked my location using PVGIS, and while I get about 1000 solar hours on my southeast and southwest surfaces at a 25° roof pitch, the two north-facing surfaces only receive around 7xx solar hours. So that's roughly a 25-30% loss.
I checked my location using PVGIS, and while I get about 1000 solar hours on my southeast and southwest surfaces at a 25° roof pitch, the two north-facing surfaces only receive around 7xx solar hours. So that's roughly a 25-30% loss.
D
Deliverer14 Sep 2021 11:13You should always utilize all available surface areas. The larger the system, the more cost-effective it becomes, since fixed costs (electrician, inverter, scaffolding) do not increase significantly. If PVGIS values are below 650, you might consider omitting it. However, this usually only applies to roofs truly facing north with an angle steeper than 25° (25 degrees). So, this is quite rare.
It’s best to plan the system with the help of the photovoltaics forum first and only then contact solar installers.
Currently, storage systems are neither environmentally nor economically viable. (Not anytime soon)
Regarding the patio roof: Would you have considered this if you had, instead of photovoltaic panels, roofing tiles on the roof? They can also break sometimes. ;-) So, no — better leave this to the solar installer/carpenter/roofing specialist. They will find solutions. They rarely actually “need” scaffolding. It’s mostly just a regulation.
It’s best to plan the system with the help of the photovoltaics forum first and only then contact solar installers.
Currently, storage systems are neither environmentally nor economically viable. (Not anytime soon)
Regarding the patio roof: Would you have considered this if you had, instead of photovoltaic panels, roofing tiles on the roof? They can also break sometimes. ;-) So, no — better leave this to the solar installer/carpenter/roofing specialist. They will find solutions. They rarely actually “need” scaffolding. It’s mostly just a regulation.
D
Deliverer14 Sep 2021 11:18Pacc666 schrieb:
What do you think about a photovoltaic patio roof?Great idea. Whether it pays off financially needs to be checked (currently it should cost less than 1300 € per kWp). But if in doubt, you get a useful roof and a bit to show off for a few hundred euros. Of course, only as a supplement to the main house roof.Pacc666 schrieb:
I don’t know the exact roof pitch 😀 but it should be around 30-35 degrees, so probably uninteresting againIf the initial photo is aligned to north, this is not your house. So it becomes interesting again (actually a must).You have no idea how LITTLE energy you get in bad weather (tip: it’s about 10% of the system’s capacity). I have 28 kWp above me. And when it rains hard, I don’t run the dryer and dishwasher at the same time. And eventually, the electric car also needs some power. So no. The first 100 kWp are definitely not "too large" yet.
D
Deliverer14 Sep 2021 11:20Pacc666 schrieb:
I thought that since feed-in tariffs are continuously decreasing, it’s now worth it So far, it only benefits the seller. ;-)
Fraunhofer recently recalculated this: Storage systems become economically viable at around €250 per kW (kilowatt). Current offers average around €1000.
It can be done as a hobby. It is still far from being economically justifiable.
(Since I know what’s about to happen here, I’m already getting coffee and popcorn ;-)
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