What Marks or Tests Should the Modules Have Passed?

The Photovoltaic modules you put on your building must have the Underwriters Laboratories seal. Too, the module’s design should have been qualified to either the IEEE 1262, IEC 61215 or IEC 61646 standards. UL safety listing, of course, assures the local electrical inspector will approve what you have chosen to install. The National Electric Code requires the UL label. The IEEE and IEC certification tests, by a recognized independent testing laboratory, assures the design and construction of the module meets certain recognized standards, giving your end customer confidence in the product.