The dilemma for every PV installer: You need to run solar cables through a roof. But the MC4 connectors are too large for conventional openings. The classic solution? Disassemble MC4 connectors – time-consuming and prone to errors. But there is a better alternative.
The problem: Why MC4 removal becomes necessary at all
Solar modules are delivered with MC4 connectors (diameter approx. 13–15 mm). However, conventional roof penetrations are only designed for 8–10 mm. The result:
- MC4 connectors must be manually disassembled and reconnected
- Time expenditure per module: 15–25 minutes
- Risks: Damaged contacts, incorrect connections, safety problems
For a typical 8-module system, this means: 2.5–3.5 hours just for connector assembly – and 162–262 euros in additional costs.
The alternative: NEXCAPE® roof penetration without MC4 removal
The NEXCAPE® roof penetration has a wider channel opening, through which the complete MC4 connector fits – without disassembling it.
- Wider channel opening: MC4 connectors fit through with room to spare
- 100% TPU: UV-resistant, long-term stable for decades
- Abrasion protection: Protects cables from wear due to tile movements
- Made in Germany: Highest quality standards in development and manufacturing
- No tools required: The connector is simply pushed through
Comparison table: With vs. Without MC4 removal
| Criterion | With MC4 removal (classic) | Without MC4 removal (NEXCAPE®) |
|---|---|---|
| Time per module | 20–25 min. | 2–3 min. |
| Total time (8 modules) | 2.5–3.5 hours | 16–24 min. |
| Tools required | Yes: Connector tool | No: Purely manual |
| Risk of error | High: Contact damage | Minimal: No manipulation |
| Module manufacturer warranty | Risk: Manipulated connectors | No risk: Connectors untouched |
| Long-term durability | 10–15 years | 25+ years (Made in Germany) |
Cost calculation: How you save with every installation
With MC4 removal (classic): 8 modules × 22 min = 176 min = 2.93h → 205 Euro labor costs just for connectors
Without MC4 removal (NEXCAPE®): 8 modules × 2.5 min = 20 min = 0.33h → 23 Euro labor costs
Your savings per installation: 182 Euro. For 10 installations per month: 1,820 Euro. For 100 per year: 18,200 Euro.
Installation: Step by step
Classic (with MC4 removal) – 20-25 min/module
- Disassemble MC4 connectors with tools
- Thread individual cables through the penetration
- Reconnect under the penetration
- Check fit, readjust if necessary
NEXCAPE® (without MC4 removal) – 2-3 min/module
- Guide MC4 connector with complete cable through the penetration
- Check fit – done
Frequently asked questions
Is a larger opening not less tight?
No. The NEXCAPE® penetration uses special UV-resistant TPU that adapts to the connector and provides reliable abrasion protection.
Does this work on tiled roofs?
Yes, the NEXCAPE® penetration was specially developed for tiled roofs – Frankfurter Pfanne, plain tiles, double-groove tiles, and more.
How long does the penetration last?
Quality penetrations made of UV-resistant 100% TPU last 25+ years.
Conclusion: Why "without MC4 removal" is becoming the new standard
- 90% less time per module
- 180+ Euro savings per installation
- No sources of error, no liability risks
- Connectors remain unchanged, module warranty remains valid
- Made in Germany, 25+ years reliability
For B2B commercial customers, we offer package solutions from 20 to 1,000 pieces.
Contact: support@nexcape.de | Tel: 07054 927999 | Mon–Fri 8:00–17:00
Discover NEXCAPE® roof penetrations now at dachdurchfuehrung24.com
