1.With the capacity of age and UV-resistance 2.The PV-Junction box can work in the atrocious weather 3.The PV-Junction box is not only with the convenient installation of ribbon bands but also all connections are double strengthened connection 4.The maximal working current will be changed when the box is fixed with different types of diode 5.Standard: DIN V VDE 0126-5/05.08 UL1703 - See more at: http://www.solar-system-pntech.com/PV_junction_box_3_diodes_15A_clamping_801.html#sthash.nEcv4Fel.dpuf