Technology > Performance



CIS is different. Solar Frontier has worked with leading solar panel technologies since the 1970s, including crystalline silicon. We realized in the early 1990s the unique potential of CIS - and we’ve pursued it ever since.

CIS stands for key ingredients copper, indium and selenium. But like other CIS manufacturers, we also include the elements gallium and sulfur in the semiconductor layer. That’s why our technology is sometimes called CIGS.

In the solar panel industry, CIS is known for its economical, ecological advantages. 

Higher performance in real-world conditions

Solar Frontier’s CIS modules generate more electricity* in real-world conditions – where it counts for the customer.

MORE electricity* in real world conditions (where it actually counts)

*kilowatt-hours per kilowatt-peak


Why do real-world conditions matter?

If you could build the ideal solar power system, you would choose an installation facing south with a tilt angle best suited to the direction of the sun. The environs would be absolutely free of shade and the air would be clear and devoid of impurities – whether dirt, dust, fog or smog. The weather would always be cold and sunny, bringing out the highest possible energy yields.

But in the real world, this very rarely happens. Roofs have different orientations. Temperatures climb to extremes – especially in deserts. Trees, chimneys, buildings and even clouds cast shadows. Humidity, lighting conditions and a myriad of other climatic conditions fluctuate between environments. Every one of these factors can impact the energy yield of a solar power system. Solar panels, based on their technology, will react differently to real-world conditions – some better than others.

CIS advantages in real-world conditions

CIS is suited to dealing with real-world conditions, resulting in higher energy yield. This makes our technology different.

  • Better performance in hot conditions
    Solar panels are affected by heat. Some technologies are better at handling it than others. CIS delivers high yields – even in desert environments. This is indicated by the lower temperature coefficient of CIS compared to crystalline silicon modules.

    Better performance in hot conditions

    click graph to enlarge

  • The “light-soaking” effect
    CIS modules increase in power output after exposure to light during the first few days of operation. This means that their actual power rating is higher compared to their initial labelled value. You could say that they’ve “warmed up” to the job.

    click graph to enlarge

  • Better tolerance for shadows
    Shadows cast perpendicular to the shorter end of the module will only affect the covered part – the uncovered part will perform normally. Under such conditions, crystalline silicon modules almost stop working.

    click graph to enlarge

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