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

Please briefly describe your roof (roof shape, available roof area, orientation, and any obstacles such as bay windows, dormers, or chimneys).

For a typical photovoltaic system, you need an inverter that converts the direct current generated by the photovoltaic panels into alternating current. The inverter must be appropriately sized according to the system’s capacity. As the inverter's power increases, its size also increases.

dhd82 schrieb:

Please briefly describe your roof (roof type, available roof area, orientation, and any possible obstacles such as bay windows/dormers/chimneys).

For a standard photovoltaic system, you need an inverter that converts the direct current generated by the photovoltaic system into alternating current. Depending on the size of the system, the inverter must be appropriately sized.
As the capacity of the inverter increases, so does its size.

Our roof has a pitch of 22 degrees, no bay windows or dormers, just a chimney from a gas fireplace on the south side. I don’t know the exact roof area.

The orientation is southwest.

What would you recommend? Rather 3-4 DN50 empty conduits or are two DN75 sufficient?

Sorry, which conduits are you actually talking about? Do they all have to go from the roof to the connection room? I thought all the lines are brought together under the roof, and then one cable runs down to the inverter. And then one large conduit is enough, or you can have the cable installed directly. Isn’t that how it works?

Yaso2.0 schrieb:

We have a roof pitch of 22 degrees, no dormers or bay windows, only a chimney for a gas fireplace on the south side. I don’t know how much roof area that is.

South-west orientation.

The roof pitch is an advantage, so it’s probably worth considering installing panels on the north side as well. This needs to be calculated.
It’s a bit unfortunate that you have obstacles on the south side.
If the house hasn’t been built yet, I would ask if it’s possible to move the chimney to the north side.

Since it’s likely that all roof sides can be used, different inverter configurations are possible for you:

a) The classic setup:
2 small inverters with two MPP trackers each, one string per roof side
b) SolarEdge:
1 inverter with MPP tracking at module level via optimizers
c) Solar modules with microinverters (e.g., SunPower Maxeon 5; I’m not sure if this is already available)

I would have two M60 conduit pipes installed from the attic to the utility room. This is quite generously sized but will allow for a few bends and also makes it easier to add cables later on.

In our case, 9 cables were run through an M40 conduit pipe. Because there was a bend in the pipe, the attic floor covering had to be cut at the bend, and the cables were pulled in from there. That was quite annoying.

dhd82 schrieb:

The roof pitch is a positive aspect, so it will probably be worthwhile to cover the north side as well. This should be calculated.
It is a bit unfortunate that you have obstacles on the south side.
If the house is not yet built, I would ask whether the chimney could be moved to the north side.

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 considered this topic at all before.

The chimney can no longer be relocated, as it is a “shaft” for a gas fireplace and is positioned where the fireplace will be. On the north side, the chimney would run through the middle of the hallway on the upper floor.

Maybe I could have the roof hatch window moved to the east, so only the chimney would remain in its current place. The question is whether that would make a difference or not.