Using Shingled Solar Panel Technology Hidden busbar, increasing the front lighting area of the solar panel, improving the power and work efficiency of the solar panel Item NO: 500W Shingled MOQ: 10 Shipping Port: Guangzhou/Shenzhen, China Original Region: China Lead Time: About 15 working days Warranty: 25 Years Solar Cell Mono Cell: 210*35 Efficiency: > 20.24% Certification: EST, UL, CE Panel Size: 2275*1086*35MM