Regular checks are necessary for your photovoltaic power plant to function optimally and to protect against performance failures. Therefore, our employees get a precise idea of the condition of your plant right at the site in order to make detailed statements about it.
Specially developed metrology and analysis methods enable us to ascertain precisely the performance of individual module strings and the actual plant performance or to detect underperformance at the level of modules, strings or superstrings. Particularly advantageous is that the operation of the plant need not be interrupted and losses in yield due to measurements are thus minimized. Independent of the type and size of the plant, you quickly receive information on the deviation of the installed modules from their normal performance. High-quality metrology and the verification of measurement data by means of a precise reference cell minimize potential measurement inaccuracies. After an expert data evaluation, our clients receive a detailed report on the performance of the inspected plant components.
The mobile test center, with state-of-the-art equipment, is capable of electroluminescence and thermographic imaging, as well as the determination of the nominal output of solar modules right at the site. Unseen module defects, such as those caused by improper storage or assembly, are discovered and the contractually agreed nominal output checked. Thus you can quickly start taking further steps to eliminate faults without any delay or potential transport damages. It is our pleasure to help you do so.
Precision measurement involves determining the peak performance under outdoor conditions by means of a curve measuring device which provides very accurate measurements, with general measuring inaccuracies of less than 2.5 percent. This method of measurement takes its orientation directly from the standard test conditions and thus can be used with equal accuracy for Si and thin film modules. In the case of thin film modules, the measurement can be combined with a preconditioning. The precision measurement is taken using a two-axis module tracking system and recording the surrounding conditions with highly accurately calibrated sensors using a minimum of measurement corrections due to the proximity to the target values. Furthermore, the measuring method follows IEC 61215:2005 and IEC 60904-1:2006, taking into account IEC 60891:2009 and IEC 61853-1:2011.
This method enables the visualization of noticeable thermal faults on modules and plant system components. These include, for instance, hotspots, short circuits, defective bypass diodes or contact faults. This enables time-efficient thermal imaging. In order to reliably detect faults, analyzing the IR images obtained, in particular, calls for special expertise which we have been able to demonstrate since 2005 in publications and research. Thus our experts can purposefully classify thermal abnormalities and estimate the risk.
In the case of repeat measurements, various inspections are made of the plant from the AC and DC side. These quality assurance measures always take consideration of the relevant effective DIN standards. They enable you to detect failures or malfunctions on (sections of) the plant and underperformance early on. Intact insulation is also indispensable for electrical systems to operate safely. With a professional insulation measurement, we not only reliably detect safety defects, but we also identify any looming defects in the modules and cabling. Based on the results of our measurements, you can respond in due time and minimize losses in yield.