A photovoltaic junction box is an important device of a solar PV array. It is also referred to as PV Combiner Box or Array Junction Box. It collects DC power from several PV input strings to be connected in parallel with blocking diode, fuse and surge protection device on each PV input string before transferring the power to DCDB /PCU/Inverter. Enclosures of all junction boxes are made of FRP/polycarbonate material which is protected against dust, water, vermin contamination and meets IP54 standards for outdoor application. Junction boxes also have suitable cable entry points, with suitable glanding /MC4 connector arrangement, for both input and output cables with protection as per MNRE standard.