Multi Junction panels made of CIGS (Copper Indium Gallium Selenide) materials, generally called CIS panels, have certain advantages over traditional silicon panels. These panels are more suited for real world conditions and provide higher energy yield.
Magnified schematic of CIGS layers
They have lower temperature coefficient than crystalline silicone panels and perform better under hot conditions and even in desert environment.
Also, after exposure to light, with in the first few days of operation, CIS modules deliver increased power output. This means that their actual power rating is higher than the original labelled value, since they have “warmed up” to the job and it will remain stable for the entire life cycle.
CIS modules outperform other traditional technologies by generating more electricity in less than ideal conditions, such as when facing east, west, north or when installed flat.
Under certain shadow conditions, crystalline silicon modules almost stop working. But CIS panels work normally under shadows.