One solar park in the Greek city of Oinofita consists of seven dual-axis astronomical controlled trackers in total. But the owner experienced problems with the tracking functionality of the existing systems, and due to the high maintenance expenses for astronomical tracking, the park operator Kepanape decided on retrofitting to the patented MLD technology from Deger. The Greek branch manager Ioannis Markopoulos of Degerhellas and his team participated with this project and developed a technique for converting the astronomical systems to a sensor-controlled technology.
The solar park has an installed capacity of 100 kilowatts. To show the effect significantly, a tracker with an installed capacity of 13.4 kilowatts was chosen which was previously equipped with astronomical tracking and also encounters shadowing in the afternoon. The previous control unit was removed and equipped with two MLD sensors from Deger. The effect of the sensor-controlled tracking quickly became apparent. After just one day the yield of the solar modules was improved by 7 percent.
The patented MLD sensors from Deger continually measure the intensity of the radiation and move the solar module installation into the most advantageous position. The modules not only take the solar irradiation into account, but also, for example, light that is reflected from light surfaces, snow or rocks. From the early morning hours the modules catch the sun light up to the evening and produce energy the whole day.
