Select Page


UL 1703 Testing of Flat Plate Photovoltaic Modules and Panels

The UL requirements cover flat-plate modules intended for installation on or integral with buildings. As a certified environmental lab, we realize the importance of flat plate module testing. Meeting the environmental UL 1703 compliance requirements can be difficult. We understand the challenges and guide companies through the process.

Keystone Compliance partners with customers to achieve environmental product compliance. Not only do we create an accurate test plan to eliminate expensive over-testing, our proven process helps avoid product launch delays. We are in constant communication throughout the entire test process. We provide comprehensive reports shortly after completion of the standard compliance test. Our expert UL 1703 test engineers take pride in providing the peace of mind that all of your needs will be met.

Request a quote to receive testing services tailored to your specific requirements. Contact us to receive more information on environmental UL flat-plate photovoltaic testing.

Summary of UL Compliance Testing of Photovoltaic Modules and Panels

The UL 1703 standard compliance test also determines requirements for freestanding panels. These laboratory tests are in accordance with the National Electrical Code, NFPA 70, and Model Building Codes.

The maximum voltage of the systems being tested can not exceed 1000 V. The UL 1703 test also considers components able to provide electrical connection to and mounting facilities for flat-plate photovoltaic modules and panels.

The module being tested must be completely assembled when shipped from the manufacturer. 

Scope of UL 1703 Flat Plate Modules and Panels

The same test procedure used for electrical performance measurements is applied. A polymeric material system serving as the enclosure of a part involving a risk of fire must be applicable to specific requirements. These requirements are concerning flammability, ultraviolet light exposure, water exposure, immersion, and hot-wire ignition.

The Ul 1703 compliance testing standard does not cover:

  • Equipment intended to accept the electrical output from the array, such as power conditioning units and batteries.
  • Any tracking mechanism.
  • Cell assemblies intended to operate under concentrated sunlight.
  • Optical concentrators.
  • Combination photovoltaic-thermal modules or panels.

The photovoltaic module compliance test contains keywords necessary to understand the standard. Some keywords are defined below:

Module (flat-plate) – The smallest environmentally protected assembly of solar cells and ancillary parts. Such as interconnects and terminals, intended to generate DC power under non concentrated sunlight.

Panel (flat-plate) – A collection of modules mechanically fastened together, wired, and designed to provide a field-installable unit.

Rated Operating Voltage – The voltage at which maximum power is available from the modul or panel under standard test conditions.

Expert UL 1703 Compliance Testing of Photovoltaic Modules and Panels

Keystone Compliance strives to give our customers more time and energy on product development instead of testing. In addition to UL 1703 compliance testing, Keystone has a full lab of test equipment which permits us to provide a broad scope of other compliance tests. The tests range from industries such as commercial, aerospace, medical, and ecommerce.

Contact us to receive more information on UL flat plate compliance testing.