The dilemma for every PV installer: You have 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 Disassembly Is 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 reassembled
- 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 Disassembly
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 move
- 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 Disassembly
| Criterion | With MC4 Disassembly (classic) | Without MC4 Disassembly (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: Entirely 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 Disassembly (classic): 8 modules × 22 min = 176 min = 2.93h → 205 Euros labor costs for connectors only
Without MC4 Disassembly (NEXCAPE®): 8 modules × 2.5 min = 20 min = 0.33h → 23 Euros labor costs
Your savings per installation: 182 Euros. With 10 installations per month: 1,820 Euros. With 100 per year: 18,200 Euros.
Installation: Step-by-Step
Classic (with MC4 Disassembly) – 20-25 Min/Module
- Disassemble MC4 connectors with tools
- Thread individual cables through the penetration
- Reconnect below the penetration
- Check fit, re-adjust if necessary
NEXCAPE® (without MC4 Disassembly) – 2-3 Min/Module
- Guide MC4 connector with full cable through the penetration
- Check fit – done
Frequently Asked Questions
Isn't a larger opening less watertight?
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, Biberschwanz, Doppelmuldenfalzziegel and more.
How long does the penetration last?
High-quality penetrations made of UV-resistant 100% TPU last 25+ years.
Conclusion: Why "without MC4 disassembly" is becoming the new standard
- 90% less time per module
- 180+ Euros savings per installation
- No sources of error, no liability risks
- Connectors remain unchanged, module warranty remains valid
- Made in Germany, 25+ years of reliability
For B2B commercial customers, we offer package solutions from 20 to 1,000 units.
Contact: support@nexcape.de | Tel: 07054 927999 | Mon–Fri 8:00–17:00
Discover NEXCAPE® Roof Penetrations now on dachdurchfuehrung24.com
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