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Flat Roof PV System Roof Penetration: What Professionals Need to Consider
Flat Roofs and PV Cables: An Underestimated Challenge
While cable routing is a well-known step for pitched tile roofs, flat roofs present special requirements. The roof is almost horizontal — and y...
Retrofitting a PV system: Safely routing cables through the roof afterwards
Existing Roof and PV Retrofit: The Starting Point
More and more homeowners and businesses are retrofitting existing buildings with PV systems. The roof was not designed for PV cables — there are no...
PV Cable Abrasion Protection: Why it's Indispensable
Why PV Cables Need Mechanical Protection
Photovoltaic cables are considered robust – and they are. However, when laid over or through tiled roofs, even high-quality cables reach their limits. The e...
Slate Roof Penetration: Safely laying PV cables
Slate Roof and PV System: A Special Challenge
Natural slate is one of the most demanding roofing materials for PV installation. The tiles are thin, brittle, and sensitive to mechanical pressure. At...
Roof lead-through for "Frankfurter Pfanne" tiles: Professional routing of PV cables through concrete roof tiles
Why the "Frankfurter Pfanne" tile has special requirements
For decades, the Braas "Frankfurter Pfanne" (Frankfurt Pan) tile has been one of the most frequently installed roof tiles in German-speak...
Running grounding cables and PV cables together through the roof – how electrical companies solve this problem cleanly
Why the grounding cable feed-through is often underestimated
When planning a PV installation, the focus is often on the DC cables. In contrast, the grounding cable – typically 4 mm² or 6 mm² coppe...
MC4 Connector Roof Feed-Through: Routing PV Cables Without Connector Disassembly
Why MC4 Connectors Become a Problem with Roof Penetrations
MC4 connectors are the standard in photovoltaic systems for wiring between modules and inverters. The connectors are designed to establis...
2026 PV Season: How electrical contractors can best prepare for the wave of orders
The PV high season is just around the corner. Between March and June, electrical companies in Germany traditionally record the most installation orders—and 2026 will be no different. On the contrar...
Roof Feed-Through for Solar Cables: Which Solution Suits Your Roof?
Choosing the Right Roof Penetration for Your PV System
When installing a photovoltaic system, solar cables must be routed from the roof into the building. The choice of the correct roof penetration...