SCHOTT Solar – the name represents first class quality, stability of performance and high energy yields on which you can rely. This has again been confirmed by TÜV. In the Energy Yield Test conducted by TÜV Rheinland the SCHOTT PERFORM™ POLY 225 photovoltaic module achieved first place and once more demonstrated SCHOTT Solar’s expertise in the field of design and development.
A total of 13 modules were compared with one another in the year long test. What is special about the Energy Yield Test is that the decisive factors are not testing in an environmental test chamber and measuring the performance when using a solar simulator, but rather it is the actual energy yield that decides which module occupies the top position at the end of the test.
Because the interplay between inverters and modules cannot be measured accurately and because various interactions take place, TÜV Rheinland developed its own set-up to provide very precise measurements. Electrical loads are used to automatically maintain the individual modules at the MPP (maximum power point) during the test.

So that none of the participants was disadvantaged, TÜV Rheinland only included those values taken when all the modules being tested were at the MPP. A key figure was the yield per watt peak power measured by TÜV Rheinland under standard test conditions. This relative measurement also offers a particularly low level of overall uncertainty in the range between +1% and -1.5%. This must however still be taken into consideration when comparing the results from all the participants.

Other product characteristics are important for obtaining high energy yields under actual operating conditions. For example the good behaviour of the SCHOTT PERFORM™ POLY 225 at low light intensities is particularly important when the incident radiation being received is not perfect. Solar modules from SCHOTT Solar also provide high energy yields in the mornings and evenings, in winter when the sun is low and also when the sky is overcast.
The temperature coefficient of the modules was another decisive factor in the victory, because a low temperature coefficient permits a high level of modular efficiency, even at high temperatures. This ensures high yields of current when there is a large amount of incident solar radiation in summer.
Read the complete article with all the test results: