A heavy-duty anodized aluminum frame provides strength and convenient mounting access. Cells are laminated between high transmissivity, low-iron, 3mm tempered glass and sheet tedlar-polyester-tedlar (TPT) material by two sheets of ethylene Vinyl acetate (EVA). This protects against moisture penetrating into the module. Mono-Crystalline cells are up to 20% efficient and is said to have a service life of about 25 years.(br>
Output Power (peak): 20W
Max Power Voltage (Vmp): 17.6v
Max Power Current (Imp): 1.14A
Open Circuit Voltage (Voc): 21.6v
Short Circuit Current (ISC): 1.23A
Working Temperature: -45C to +85C
Recommended Controller: 12V-5A"
When using a solar panel to charge a battery, a Solar Charge Controller is required and sold separately.