Full-Screen Design: Star Cleanedge Series Solar Panel Feature a Frameless Full-Screen Design that prevents dust/water buildup. Rain Self-Cleaning, 0 Maintenance CostsQuality Guarantee:100W 24 Volt Solar Panels Use 25% High-efficiency Cells, Certified by ETL, ISO9001, CE, and US Patents, Stable Power Generation Even in Harsh WeatherPower Boost:No Frame & Dust Obstruction,15% Increase in Power Generation Compared to Normal Solar PanelsReduce Costs: No Dust Accumulation,Only Rain Cleaning,Saves $3600/year on Cleaning Costs for the Family Travel FundMore Safety: No Need to Clean Rooftops,Climbing-Free,Faster Snow Removal in Winter, Safer to UseEasy Set Up: No Professional Needed,Pre-drilled Holes for Easier Installation