Solar module with high efficiency solar cells. Strong, lightweight aluminum frame design with reinforced sealing and load hold to prevent freezing and warping, and stand against high wind. Under Standard Test Conditions( STC) : Irradiance of 1000W/ m2, Am1.5 and 25 cell temperature Mechanical Characteristics Dimensions 1580mm ( L) x808mm ( W) x 45mm ( H) Weight: 16kg Solar Cells: Monocrystalline solar cells, 72cells in a 6x12matrix connected in series Construction: Front: High-transmission 3.2mm tempered glass; Encapsulate: EVA; Back: TPT Frame: Clear anodized aluminum alloy Color: silver Module Warranty: 25-year limited warranty of 80% power output; 10-year limited warranty of 90% power output; 5-year limited warranty of materials and workmanship. Performance Rated Power [ Pmax] 180W Power Tolerance ± 5% Nominal Voltage 36V Design Life 25 years Electrical Characteristics Maximum Power [ Pmax] 180W± 5% Maximum Power Voltage [ Vmp] 36V± 3% Maximum Power Current [ Imp] 5.0A± 3% Short-Circuit Current [ Isc] 5.56A± 3% Open-Circuit Voltage [ Voc] 44V± 3% Current Temperature Coefficient 0.031% / Voltage Temperature Coefficient - 0.31% / Power Temperature Coefficient -0.42% / Maximum System Voltage 1000V