Grape Solar GS-P-280-Fab1 280-Watt Polycrystalline Solar Panel Rigorous quality control to meet the highest international standards. High transmittance, low iron tempered glass with enhanced stiffness and impact resistance. Unique frame design with high mechanical strength for easy installation. Advanced encapsulation material with multilayer sheet lamination to provide long-life and enhanced cell performance. Outstanding electrical performance under high temperature and low irradiance conditions.