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.

Output Power(peak): 15W 
Max Power Voltage (Vmp): 17.6v 
Max Power Current (Imp): 0.85A 
Open Circuit Voltage (Voc): 21.6v 
Short Circuit Current (ISC): 0.92A 
Working Temperature: -45C to +85C 
Tolerance: ±5% 
Size: 340x400x28mm 
Recommended Controller: 12V-5A"
When using a solar panel to charge a battery, a Solar Charge Controller is required and sold separately.