EN 
PT_BR 
The race towards energy efficiency in the solar market continues at full steam. This is because the manufacturer Risen, continuing the new line of 500 W Titan modules, launched in December 2019, announced, in a forum held in China, that it had developed 600 W modules.
Scheduled for delivery in Chinese territory from June 2021, the photovoltaic panel has an efficiency of 21.2% and has a low Voc (Open Circuit Voltage) of 41.4 V. Furthermore, the company highlights the high Isc (Short Circuit Current) of 18.5 A.
“The lower the open circuit voltage, the lower the BOS (Balance of System) cost. With the same module efficiency, every 2V reduction in open voltage will reduce the corresponding BOS cost by about 0.5 cents,” he said Huang Qiang, vice president of Risen.
In addition to the high power differential – which reduces the LCOE (Levelized Cost of Energy) with the reduction of tracker structures, cables and physical space on the ground – the module has a reduced length and is less than 2.2 meters. This means there is no need to make major changes to existing trackers on the market.
According to the manufacturer, this series of components also features non-destructive cutting technology, high-density packaging and a multi-busbar grid. “High power modules mean lower cost per kWh. Right angle 210 pack avoids packaging loss considering the advantages of large area. As the battery area increases, its bending performance is improving. In terms of efficiency and reliability, there will be more room for improvement in large sizes in the future than conventional products,” highlighted Dind Ning of Aixu Technology.
The size of the 600W module is 2172 x 1303 x 35 mm and the weight is 31.5 kg. There is still no forecast for deliveries in Brazil.
600 W modules were announced by manufacturer Risen during a forum held in China
Module reduces risk of hot spots
According to Risen, some in the industry have previously stated that the increase in short circuit current caused by the decrease in open circuit voltage will bring a greater risk of hot spots. In response to this problem, Liu Yafeng, senior director of R&D at Risen, explained that it is necessary to understand that they are caused by defects or batteries in the rope.
“Hot spots are formed by obscuration, which is mainly related to the current in the chain and the defective battery. Cell quality control and chain current control are the main means of reducing them. In the case of 600W modules, they can reduce the risk of hot spots by 17.7%,” concluded Yafeng.
