16 May 2023
The patented Solar Energy Optics (SEO) light redirecting film has been developed by Intelligent Control Systems Ltd. and provides an economical way to mitigate known losses in the edge area of HJT solar cells. By applying the SEO film to the inside of the HJT module front glass, light is redirected from the less efficient edges into the more efficient regions of the cells. The high performance is a result of the combination of two effects. The first one is an increased solar cell efficiency by minimizing edge recombination losses, while the second is an improved utilization of light from inactive module areas. Detailed optical simulation models of the solar modules and the SEO film have been constructed and validated with experimental data. The results show that the application of SEO film to a 120 or 144-cell module, with 2mm cell gaps and a white backsheet, can provide an efficiency boost of 2.6 % relative improvement, or two power classes. As an improvement on transparent bifacial modules or alternative to the gapless solution currently applied by some module manufacturers, the efficiency gains can exceed 3.5 %.
ICS Intelligent Control Systems, Ltd. | www.ics.fi