UL 1703:2024 STANDARD FOR SAFETY Flat-Plate Photovoltaic Modules and Panels

UL 1703:2024 is the official safety standard issued by Underwriters Laboratories for flat‑plate photovoltaic modules and panels. It applies to PV modules used in grid‑connected and off‑grid systems with a maximum system voltage of 1500 V, covering building‑mounted, building‑integrated, and freestanding installations. The standard sets mandatory safety requirements and test methods to prevent electric shock, fire hazards, mechanical failure, and environmental degradation.

This edition focuses on critical safety evaluations including insulation, grounding, current carrying capacity, mechanical load, thermal cycling, humidity‑freeze, and UV exposure. Unlike performance standards such as IEC 61215, UL 1703:2024 prioritizes safety performance and construction reliability. Compliance with this standard is widely required for market access in North America, ensuring PV modules meet strict safety criteria for residential, commercial, and utility‑scale applications.

LISUN supplies the fully test solutions for the following UL 1703:2024, please see the below excel table:

UL 1703:2024 Clause and Subject	LISUN MODEL
14 Corrosion Resistance	YWX/Q-010
37.1 Salt spray test	YWX/Q-010
15 Accessibility of Uninsulated Live Parts(Figure 15.1)	SMT-PB
19 Temperature Test	GDJS-015B
34 Accelerated Aging Test
35 Temperature Cycling Test
36 Humidity Test
20 Voltage, Current and Power Measurements Test	DC3005
21 Leakage Current Test	WB2675D
26 Dielectric Voltage-Withstand Test	SUG255
27 Wet Insulation-Resistance Test	WB2681A
31 Fire Tests	ZY-3
33 Water Spray Test	JL-UL
37.2 Moist carbon dioxide/sulphur dioxide	SQCO-300
38 Metallic Coating Thickness Test	EDX-2A