ᐅ Which conduit is suitable for photovoltaic installations?

hampshire schrieb:

It depends on the system and the layout. Wiring requirements can vary quite a bit. Usually, the proposed thin conduits are sufficient. If not, it was unwise not to have researched the specifics.

Yes, I wonder how only one conduit can be recommended for a carport with a gable roof.
There is a likelihood that two strings will be used due to the east/west orientation.
That’s why I suggested 2x M25 conduits.
Also, some electricians prefer to run the grounding separately.

Better to have one more conduit, one size larger, than to regret it later.

Aside from that, there is option B, which involves installing the inverters on the carport and connecting the carport to the house with only one thick underground cable, considering e-mobility. This causes additional costs for a small subdistribution at the carport, but only requires one cable from the house to the carport.

hampshire schrieb:

It’s a matter of the system and the layout. Wiring requirements can definitely vary. In most cases, the proposed thin conduit is sufficient. If not, it was a mistake not to research it thoroughly beforehand.

Very valid point. I hadn’t checked properly in advance and just let the electrician handle it. The result was a relatively thin empty conduit.

Since I later decided independently on a solution with only one string, it worked out fine. However, for a typical system, the conduit probably wouldn’t have been large enough despite the "photovoltaic preparation."

guckuck2 schrieb:



Apart from that, there is option B, which involves installing the inverters on the carport and connecting the carport to the house with a single "thick" underground cable to accommodate e-mobility. This results in additional costs for a small sub-distribution board at the carport, but only one cable is needed from the house to the carport.

An inverter or a wall box requires a network connection. If your Wi-Fi coverage is not reliable there, consider installing a separate thin conduit for network cables into the house.

Direct hit on East/West
So, two empty conduits. I’m installing the conduits just in case. I could imagine that, sometime in the distant future, there might be a mandatory requirement for photovoltaic systems, and then I wouldn’t have to tear everything up again. Currently, I won’t be installing a system since I would have to finance it externally, leaving very little profit. I have too many other projects to focus on photovoltaic systems purely for environmental reasons.

Argh, network cable needed? Then I’d have to thread another cable through the multicable conduit. The power cable for the shed is already in the same duct as the telecom fiber optic cable. Hopefully, adding the network cable won’t cause any issues or loosen the telecom cable. The civil engineers did at least warn against doing this afterwards.

In case of uncertainty, I would simply oversize, for example by installing 2x HT10 pipes. That way, you always have options and it doesn’t cost much more.

Is 5 x 10 mm (0.4 x 0.4 inch) NYM cable sufficient, or would 5 x 16 mm (0.4 x 0.6 inch) NYM be better?