Highest yields – even with foggy outlook.

Mornings, evenings, fog, diffuse light, overcast skies – the sun rarely shines full force. And yet, it is precisely in the midst of these daily adversities that, thanks to their good low-light performance, the CIS PowerModules by Solar Frontier produce more power than others.

The spectral irradiation power density changes with the Air Mass factor (AM). The Air Mass factor corresponds with the distance the sunlight has to travel through the Earth’s atmosphere: AM = 1 means vertical irradiation of the Earth’s surface (midday at the equator), AM >> 1 means a low angle of incidence (sunrise or sunset). As  AM increases, the absolute value of irradiation intensity increases, but at the same time the energy shifts towards longer wavelengths (sunrise and sunset-red).

As Solar Fontier’s CIS technology has much higher sensitivity for these longer wavelengths, even reaching the infrared bandwidth, the relative energy yield of Solar Frontier’s CIS modules at this time of the day is much higher. This is particularly advantageous in the early morning and the late evening hours. Also in misty weather, in the case of clouds or contamination this property of CIS modules proves its value, resulting in significantly higher output levels than other technologies. 

High yields – even when the roof does not face south

Optimal output is achieved on installations facing south and with a tilt angle of 30 degrees to the horizontal (100 %). However, these optimal conditions  very seldom exist, and can certainly not be considered standard. 

Good low-light behaviour is also the reason why high output can also be achieved with Solar Frontier’s CIS modules on rooftops with an east/west orientation, even though mainly low angle irradiations take place at this orientation.

Mounting examples for PV installations with Solar Frontier PowerModules:

Standard Test Conditions (irradiation 1000W/m², module temperature of 25°C and sunlight spectrum with an Air Mass factor of 1.5), at which datasheet values of solar modules are measured, are very rarely found in real life. For 70% to 80% of the operating time of an installation real life, conditions show irradiation values between 200 and 800 W/m²,which is where Solar Frontier’s CIS modules display the best performance compared with all other technologies. Together with their high shadow tolerance, high temperature stability and the Light Soaking Effect, Solar Frontier’s CIS modules achieve the highest output (kWh/kWp) as well as Performance Ratio levels.