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Attaching PV Cables to the Roof: A Comparison of Methods
Cable Management on the Roof: More Than Just Tidy Installation
Securing PV cables on the roof is a step that is often overlooked in practice. However, cable routing is crucial for the longevity, sa...

Quality Control in PV Installations: Checklist
Quality Control as Standard: Why Every PV Installation Must Be Checked
A PV system not properly checked during installation becomes a risk – for the customer and for the installation company. Compl...

String Planning for PV Systems: Calculating the Number of Cables
Strings, Cables, Penetrations: How are they Connected?
String planning is the foundation of every PV system. It determines how the modules are connected, how many cables run across the roof, and ho...

Retrofitting roof penetrations: Optimising existing PV systems
Why a Retrofit Often Makes Sense
Many PV systems installed five or ten years ago have a problem: The cable penetration through the roof was solved provisionally. Silicone on a hole in the tile, a d...

Becoming a Solar Installer: Equipment Checklist for Starting Out
Starting as a Solar Installer: You Can't Do Without the Right Equipment
The shortage of skilled workers in the solar industry opens up opportunities for career changers and craft businesses that wa...

Weatherproof Materials for Solar Installations Compared
Material Selection for PV Roof Bushings: More Than Just Sealing
A roof bushing for photovoltaic cables must function reliably for decades – in heat, frost, UV radiation, and heavy rain. The materia...

PV Cable Routing for Roof Renovation: Planning and Implementation
Roof renovation and PV system: Two projects, one plan
If a roof is being renovated anyway, it's the perfect opportunity to plan for a photovoltaic system at the same time. For solar installers, thi...

Overview of Tile Roof Profiles: Which Penetration Fits?
Tile Profile and Roof Penetration: Why Fit is Crucial
Not every PV roof penetration fits every roof. The variety of tile profiles in Germany is enormous – and this is precisely where the impermeabi...

Warranty and guarantee for PV roof feed-throughs
Warranty and Guarantee: What applies to PV roof penetrations?
As a solar installer, you are responsible to the end customer for the proper installation of PV roof penetrations. But what happens if ...
