📊 Market Context (2026): Approximately 850 new PV/balcony power plant systems are added daily in Germany (over 1.33 million registered). For specialized companies, this means high volumes – and every improper roof penetration is a potential complaint. (Source: Market Data 2026, strom-report.com)
👷 From the Manufacturer – NEXCAPE® / Dachdurchführung24 (Roos Enterprises UG, Made in Germany): "The most common avoidable complaint about roof penetrations is cable abrasion at the tile edge. Our TPU roof penetration permanently protects the solar cable from chafing – installed with few tools, without cutting the MC4 connector, and without special tiles. This saves specialized companies rework and warranty cases."
The underestimated risk: cable abrasion at the tile edge
When your installers route solar cables from the roof into the building, the cables often run over the tile edge or through a roughly opened hole. The hard clay edge acts like a file: with every wind-induced movement, it chafes the insulation. Over the years, the cable can be chafed down to the conductor.
Why chafed cables become expensive
Abrasion damage often only becomes apparent after months or years – but then as a complaint. For the installation company, this means: renewed travel, scaffolding or roof access, troubleshooting, and replacement. This rework costs many times the original material and ties up installers who are needed elsewhere.
The clean solution: roof penetration as abrasion protection
A PV roof penetration guides the cable precisely through the tile so that it no longer rests on the sharp edge. It serves purely as abrasion protection at the mechanically critical point. Our penetrations are 3D-printed from TPU (UV and weather-resistant, Made in Germany) and are available in several sizes for common cable numbers.
Practical installation – without MC4 disassembly
The process is quick: grind out the tile at the penetration point, insert the cable, hang the penetration with the cables into the tile – done. The pre-assembled MC4 connectors do not have to be removed for this, which saves time on every system.
For installation companies: ex stock, quantity discount, own logo
We supply installation companies from stock – on request with quantity discounts and with your logo. This way, your installers have abrasion protection as standard and you systematically reduce future complaints.
Conclusion
Cable abrasion at the tile edge is avoidable. Those who use a clean, abrasion-protected penetration from the start save themselves expensive rework and deliver a long-lasting installation.
To the PV roof penetrations for installation companies
More for solar installers
- Roof penetration for PV cables: Abrasion protection for solar installers
- Attaching PV cables to the roof: methods compared
- Roof penetrations for solar installers: what matters for large quantities
