Advantages of this method include strong bonding between the solder ribbon and the solar cell, reducing the risk of ribbon detachment. However, there is a risk of grid breakage during soldering, and the dispensing process requires high precision, making it challenging and relatively slow. It is not just the shadow correction of the measurement unit that needs to be carried. By incorporating these advantages, 0BB technology significantly enhances the performance, durability, and efficiency of photovoltaic modules, positioning it as a key advancement in the solar energy industry. By 2024, these busbar-free solar modules had become a highlight at major solar exhibitions like SNEC PV Power Expo Shanghai. Just like many high-efficiency technologies in the history of. In this contribution several alternative approaches for non-permanent electrical contacting of busbar-free solar cells are described as the commonly used 'external busbars' method is found to overestimate series resistance and thus underestimates fill factor and conversion efficiency. Consequently, characterization and calibration laboratories were fo ced to develop new contacting units. At the same time, the question of the correct arrangement of. By Michael Rauer, Alexander Krieg, Andrea Pfreundt, Max Mittag & Sebastian Pingel, Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany The realistic measurement of solar cells is key for the whole PV industry, as accurate information about cell power is one of the most important.
