Product Name: Solar Module Voltage: 18v Cell Efficiency: Around 16% Trademark: JUGUANGNENG Transport Package: Cartons and Pallets,Standard Export Packing Specification: 40w/18v Origin: Shenzhen, China Product Description The description of solar module/solar panel is as follow:Maximum power: 40W;Maximum power voltage: 18V;Maximum power current: 2.22A;Open circuit voltage: 21.6V;Shot circuit current; 2.44A;Dimensions: 986*346*35mm;Number of cells: 36PCS;Maximum system voltage: 600V;Power tolerance: ± 3 to 5%;Front glass: 3.5mm toughened glass;frame(material, corner, and more): Aluminum alloy;Standard testing condition: AM1.5, 1000Wm2/, 25º C;Operating temperature: -40 to +85º C;Voltage temperature coefficient: -0.33%;Current temperature coefficient: +0.05%;Power temperature coefficient: -0.23%;Warranty: 2 to 5years quality warranty and 25years lifespan;Sealed junction box with water proof, cabling and connectors.