ᐅ Photovoltaic Consultation: 45° Hipped Roof Facing North/South

nordanney schrieb:

For a purely north-facing orientation in Saarland, approximately 3,700 kWh per year can additionally be generated (if that applies to the original poster). You can now calculate for yourself what the possible yield is and whether it makes sense to feed in and/or consume 74,000 kWh over 20 years (heat pump, car, etc.).
Especially in the morning and evening with the west/east sun, it already makes sense (storage is available anyway).

Yes, you can try to achieve a savings account–like return after a long time, which depends on whether the electronics last that long. You can expect modules to last 30–40 years, inverters 12–25 years. Eventually, the contactors will fail. Whether a north-facing installation is worthwhile depends on the consumption profile and it must not be the plan of an aggressive sales installer.
To the original poster:
For the offer involving a north-facing roof, I would check which electronics the provider plans to install, especially how many MPPT trackers there are and in which voltage ranges they operate efficiently. I know enough offers with multiple orientations where poor matching leads to a yield reduction of over 30%. You can reasonably verify this technically based on the characteristics of the inverters used.

Thanks, I’ll keep that in mind. At the moment, I’m coordinating with companies to arrange on-site appointments for detailed quotes. I’ll get back to you when I have something. Currently, there are only preliminary offers, since you can’t rely on them without a site inspection.

However, the rough figures might still be of interest.

1: 8 kWp, 8 kWh, 17k
2: 14.5 kWp, 10 kWh, 21k
3: 12 kWp, 11 kWh, 21.4k

I still owe a precise roof plan on my side, which I’ll try to do tomorrow. The differences in installed capacity come down to how much the windows and other elements are already factored in by the companies or not.

On the east and west sides, two modules should fit horizontally at the very bottom, with one module centered above them, also placed horizontally. This way, there would be three modules per side/triangle.
I find it difficult to estimate the width at the level of the gutter.

A 10.5 kWp system (south-facing only) with a 13.5 kWh battery storage is planned for €20,000, including backup power. Otherwise, I would have foregone the battery due to economic reasons. The battery costs about €9,000 and is therefore actually very expensive and uneconomical (excluding the value of backup power).

Well then, congratulations. The satellite dish definitely needs to be removed from the roof! What are you using the standby current for?