The fundamental difference lies in the standard each certification body evaluates against.
1.TUV Certification for PV Cables (EN 50618)
Governing Standard: EN 50618:2014 (H1Z2Z2-K).
Issuing Bodies: Awarded by German notified bodies like TUV Rheinland, TUV Sud, etc.
Market Position: The mandatory standard within the European Union and widely accepted as the benchmark for quality in most other global markets outside North America (e.g., Asia-Pacific, Middle East, Africa, Australia).
2.UL Certification for PV Cables (UL 4703)
Governing Standard: UL Subject 4703.
Issuing Body: Underwriters Laboratories (UL), the primary NRTL (Nationally Recognized Testing Laboratory) in North America.
Market Position: The required standard for the United States and Canada. Compliance with UL 4703 is essential for obtaining system approval from Authorities Having Jurisdiction (AHJs) and utilities, as it aligns with the National Electrical Code (NEC).