... 4W Polycrystalline Solar Cell with tabbing wire for DIY Solar Panel Electrical Property 1, Solar Cells Structure 2 ... power and power current2, Screened for reverse current and shunt resistance3, Constant reliability monitoring4, Sorted ... , junction boxes, solar cable, MC connector, solar eva film, solar tpt backsheet, solar alloy frame, solar tempered glass, solar inverter, solar controller etc..