Ensuring Excellence: Acceptance Inspection of Cailin BIPV Roof Tiles
- By: Cailin
- Oct 11 2025
As a premium Building-Integrated Photovoltaic (BIPV) product, Cailin photovoltaic roof tiles not only generate electricity but also form an integral part of your building envelope.
Their acceptance inspection is therefore more rigorous than conventional PV systems, ensuring both safety and performance for decades of energy generation.
This guide outlines key steps and best practices for inspecting Cailin BIPV roof tiles, helping you confidently complete the “final mile” of your project.
1. Core Principles
Inspection should follow four key principles:
Safety First • Visual Harmony • Performance Verification • Complete Documentation
It should be carried out jointly by the property owner, installation team, and, if applicable, a supervising engineer.
2. Step-by-Step Inspection Checklist
Step 1: Visual & Structural Inspection
Focuses on installation quality and integration with the building.
Overall Roof Appearance
Flatness: Roof surface should be even and straight, without bumps or irregularities.
Color Consistency: All tiles must match in color and tone.
Alignment & Gaps: Tile overlaps should be tight and straight; expansion joints must meet design specifications.
Individual Tile Check
Integrity: Check for cracks, chips, scratches, or dark spots.
Cleanliness: Surfaces must be free of cement, glue, or paint residues.
Stability: Ensure tiles are firmly fixed and stable under gentle pressure.
Edges & Finishing
Ridge, Eaves, and Gable: Components must be secure, watertight, and aesthetically neat.
Waterproofing: Inspect all roof penetrations; silicone seals must be full and uniform.
Surroundings
Shading: Confirm no new obstacles cast shadows on PV tiles.
Drainage: Gutters and downpipes should be clear and unobstructed.
Step 2: Electrical Safety Inspection
Critical for the system’s reliability and safety.
Cabling
Use UV-resistant, high-temperature-rated DC cables and compliant AC cables.
Ensure neat routing, secure fixation, and protection from heat sources.
Concealed Wiring
Photograph hidden conduit routes before wall or ceiling closure.
Grounding
Resistance: Should be below 4 Ω or meet local standards.
Connections: All metal parts—frames, brackets, inverter shells—must be bonded and corrosion-protected.
Connections & Labels
Junction Boxes: Properly sealed and fixed.
MC4 Connectors: Fully engaged with audible clicks.
Labeling: Clear, permanent labels for voltage, current, and direction.
Equipment
Inverter: Installed in a dry, ventilated area with heat dissipation.
Distribution Box: Firmly mounted and equipped with functional surge protection devices (SPDs).
Step 3: Functional & Performance Testing
Ensures the system performs as designed.
Insulation Resistance
Must exceed 1 MΩ between DC poles and ground.
Polarity Check
Confirm correct DC polarity before grid connection.
System Operation
No-load Test: Inverter starts correctly under daylight.
Load Test: Check DC voltage/current, AC power output, and daily generation.
Monitoring System: Bind the monitoring app via QR code; verify real-time data and remote control.
Initial Performance Evaluation
Compare actual output with inverter rated capacity. Unexpectedly low readings may indicate issues.
Step 4: Documentation & Handover
Complete documentation is essential for long-term reliability.
Required Documents
System layout drawings & single-line diagrams
Product certificates, warranties, and manuals
Installation and commissioning reports with test data
As-built drawings matching actual installation
3. Recommended Acceptance Process
1. Internal Pre-check: Installation team inspects the completed roof.
2. Joint Acceptance: Owner and installer verify checklist items and record evidence.
3. Rectification: Document issues and set deadlines.
4. Final Confirmation: After corrections, sign acceptance report and hand over all documents, triggering final payment.
4. Common Mistakes to Avoid
Ignoring waterproofing: Focusing solely on energy generation may cause long-term damage.
Poor grounding: Increases risk of lightning or electric shock.
Incomplete documentation: Missing final drawings or records complicates maintenance and resale.
Conclusion
Cailin BIPV roof tiles are a one-time investment with decades of returns.
A thorough acceptance inspection safeguards your investment and marks the official beginning of 25+ years of sustainable energy generation.
With Cailin, your solar roof is not only efficient and beautiful—but also safe, reliable, and enduring.