ᐅ Is it beneficial to prepare for photovoltaic systems during new construction?

With a shallow pitch, the sun’s rays (which mainly come from above) still reach the surface.

Yaso2.0 schrieb:

But the north side hardly gets any sunlight, so how could it still be worthwhile? Sorry for the silly questions, but I honestly hadn’t dealt with this topic at all before.

I checked the sun path for a random house with a similar orientation using an online tool.

I was surprised at how much light my south-southwest (SSW) side receives, even when the sun is still completely east (patio doors are in shade) – because the sun also comes from above to some extent.

And on cloudy days, the light is even more evenly distributed.

Yaso2.0 schrieb:

But the north side hardly gets any sunlight, so how could it still be worthwhile? Sorry for the silly questions, but I honestly hadn’t dealt with this topic at all before.

The chimney can’t be relocated because it’s a “shaft” for a gas fireplace and it is located where the fireplace will stand. On the north side, the chimney would run in the middle of the hallway on the upper floor.

Maybe I could have the roof access window moved to the east, so that only the chimney remains there. The question is whether it actually makes a difference if it stays there or not.

To decide whether it is worthwhile to install on the north side, you need to do two things:

a) Simulate the energy yield of that roof area
b) Project the result from a) over 20 years using the feed-in tariff and compare this value to the costs of installing on the north side (this does not yet include the savings from self-consumption of the electricity).

You can get a first estimate of the yield using pvgis—just search for it online.

If a module could fit on the south side instead of the roof access window, relocating would definitely be worthwhile, ideally moving it to the north side.

dhd82 schrieb:

a) very classic
2 small inverters each with two MPP trackers and one string per roof side

One string per roof side, which is why he planned the DN32 conduit, the electrician told me today when I asked.

Now we have planned with DN50, and he said it is actually not necessary, but if we want it that way, he will of course do it... hmm

Tolentino schrieb:

With a low pitch, the sun’s rays (which mainly come from above) still reach.

Yes, that’s true, I was basically assuming “direct” sunlight 🙂

The development of photovoltaic modules continues steadily. Currently, there are films in development (which will eventually be directly integrated into modules) that concentrate diffuse light, significantly increasing the efficiency of photovoltaic modules. This means that orientations previously considered less suitable, such as pure north-facing sides with more than 30° deviation from north (DN), could become attractive in the future. So, a DN50 orientation costs just a few euros more. I would not recommend cutting costs there.