Rain or Shine Solar Charger

Step 16 Solder together the solar array

Connect all three solar cells in parallel. The cells have silvered end tabs for connecting, but these are covered in plastic film. With your soldering iron, melt a small hole in the plastic film anywhere you need to solder a wire. The plastic film will melt, and then the tab will readily accept solder. Remember you're working on plastic and be careful not to use too much heat. Also place two solder dabs at the bottom of the cell assembly, to connect to the charger wires when the time comes. Using a multimeter, measure the polarity of the output of the solar cells, and note it. The polarity in the final pictures of this Instructable is correct, but its always a good idea to measure.