Blog series: PV flat roof systems in the wind tunnel test part I

Before mounting systems are allowed to be installed, they must comply with corresponding standards, including EN 1991-1-4. Despite all the specifications regarding statics, materials, etc., this standard, including the national annex, does not contain any specific information about wind loads to which PV systems and their mounting systems on roofs are exposed. In times of increasingly strong storms and even hurricanes, however, this is indispensable for safety and must be included in the development. That is why the solar industry relies on so-called wind tunnel tests to keep the ballast of roof-penetration-free flat roof systems as low as necessary. In our blog series, we explain how these tests are structured and what needs to be taken into account. (more…)

Green roof meets PV

One thing is for sure, it doesn’t get any greener than installing a photovoltaic system on a green roof. Recent reports have shown that this combination is very effective and has a positive effect on the performance of PV modules, for example, green roofs improve the PV yield. On top of that, the ecological aspect is of course also interesting, as green areas enable new species-rich habitats for flora and fauna due to the partial shading of the roof. There is no doubt that the combination of PV and green roof has its advantages, but there are also some things to consider. (more…)

Sabine, Victoria who will be next? The next storm is as certain as the sunrise

In recent years a series of storms have swept across Europe. The list comprises some prominent storms in Germany like hurricane Niklas (2015), storm Xavier (2017), hurricane Friederike (2018), hurricane Sabine, and storm Victoria (both in 2020). During the last hurricane named Sabine, winds reached speeds of up to 177 km/h. Even in the lowlands, speeds of around 150 km/h could still be measured. This is a good enough reason for us to take a closer look at the calculation of PV systems. Because one thing is for certain – there will be more hurricanes on the way!

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“Mounting systems” blog series part 7: Flat roof – safety – How many guardian angels have we already used?

Flat roofs are still of high relevance when it comes to the installation of PV systems. As already explained in previews articles of this blog series, the usage of roofs will change from not-used to used as soon as a PV system is installed. This results in a potential danger that previously safe work paths are now blocked. Therefore, the risk analysis has changed which particularly effects necessary work on roofs. In this sense, it may happen that paths for roof work, for example for the maintenance and servicing of water pipes or climate or ventilation systems which are now within  fall hazard areas. In such cases, a safe working condition within this area is important. System operators as well as designated companies are in charge of the responsibility to create a risk analysis.(more…)

The profile that came in from the cold

Right into the freezer and back. Well – with  an area of 30 square meters the freezer in this case is slightly bigger than the usual household devices. We are referring to a special test that we have performed on our mounting systems. We wanted to know the following: Will temperatures of  minus 20 degrees harm the rails and modules and can major icing cause frost damage? (more…)