Detailed product description: - Products include high-efficiency mono-crystalline and multi-crystalline solar cells module. Power of each piece varies from 1W to 170W - The module is designed in consistent with IEC standard, manufactured with proven materials and tested to ensure the stable output power and 25-year guarantee of service performance - For each 18 or 36 cells series strings, one bypass diode is installed to avoid "hot spot" effect - SiN/TiO2 film deposited on front surface as anti-reflection coating and gives a uniform dark blue appearance - Cells are laminated between high transmissivity low-iron 3mm tempered glass and TPT sheet by two sheets of EVA to prevent module from moisture - Heavy duty anodized aluminum frame provides high wind resistance and convenient mounting access - A water-proof versatile junction box provides flexibility of connection - Each piece of module passes appearance check and performance test which guarantee the high quality level