We are offering 3 watt solar panel. solar cell: high efficiency crystalline solar cell. Even if under the weak light, the solar module can produce maximum power output. tempered glass: anti-reflecting coating and high transmission rate glass increase the power output and mechanical strength of solar module. eva and tpt: using high quality eva and tpt to prevent destroying and water. all frame: without screw, corner connection. 8 holes on the frame can be installed. junction box: multi function junction box with water proof. long lifetime: 25 years; less power decrease. good performance of preventing from atrocious weather such as a wind and hails. resisting moisture and etching effectively, not effect by gelogy.