PV-bx2020b Main Characteristics 1. Simple, quick, safe and effective field assembly. 2. Connection between cable and jointer by easy-pressmethod. Diode use self-locking circlip, is much more solid and reliable. 3. Using a large area electric condctitity copper terminal cover transmission method for better heat dissipation. 4. Excellent plastic material, is spposed to weather and UV resistant for long-term outdoor application. 5. Approved by TUV and UL.