These 3x6 string ribbon type solar cells have been tabbed, but tabs have been clipped, (click on the picture to see a enlarged picture for details) leaving the tabs on the bus bars but both remaining tabs still have a short end that still protrudes out beyond the edge fo the cell. So there are two ways you can use these cells:
A) Simply apply flux on the end of the tabbing wires where they are cut off, and solder another section (3 inches long) of the tabbing wires to lengthen it. Typically you don't need to add extra solder becasue the tabbing wires that we provide are already coated with tin solder. So, flux and solder.
B) Use a soldering iron to heat up the wires and gently remove the clipped tabbing wires, and then apply flux and solder another full 6 inch long tabbing wire. These cells are really very good and very wholesome cells. Some tiny chips are possible, but they are very rare in this category. Because the tabs have been clipped, we rate them A-.This set of new 3"x6" solar cells are string ribbon multi crystalline cells made by a reputable and major world class solar manufacturer, and the cells have the smallest carbon foot print - they waste the least silicon in making these cells. The cells are the original factory standard cell size. The cells have never been used on panels, but they have tabs being soldered on the front side. We are fairly confident that you will like these cells. Our sorting team tries to do as good as a job possible to categorize the cells. We stand by our products. If you think the solar cells don't meet your expectations, send them back within 7 days for a guaranteed refund or replacement. From the enormous number of cells that we shipped this past couple of months, returns have been essentially negligible.