Learn to build your own solar cells panels diy kit Awesome for first time build 45, 3" X 3" ( 76 mm x 76 mm) Square, Solar Cells (Rated at 2 amps each) These cell are easy to work with. We give you 45 cells because handling cells is tricky, and you will most likely break a few. No worries! You will only need 36 to complete our suggested panel. If you do need more cells contact me and I will sell loose cells to customers who bought the 3x3 kit. 25 feet of tabbing wire (22.5 is needed) 48 inches of bus wire One blocking diode: 3 amp 50 spacers Keeps the glass front and the plastic back from putting unwanted pressure on the cells.