Solar Sphere BYOP-20T 20-Watt Tabbed Cells DIY Solar Panel Kit 12 A grade 1.7-watt 3-inch by 6-inch evergreen tabbed solar cells 3-Feet of bus wire for completing the panel connections Flux pen for soldering cells and wires 10-Amp blocking diode for preventing the panel from draining a battery Green diy energy cd-rom build a solar panel guide