SOLAR CELL, 60MM X 60MM X2MM

My measurements on one cell in full sunlight: Voc = 4.7V; Isc = 75mA
Maxmum power transfer impedance about 62 ohms. At max power you get about 150mW.

We recently did a write up on these exact panels bought from allelectronics.com. These little panels are great and very powerful! Sitting in a basement window (inside) they produce over 4 volts @ 300ma Visit: Great Job AllElectronics.com for offering such a great deal on panels this powerful.

These are some of the newest solar cells available. The Solar material is deposited on glass, and then the whole thing is coated with a plastic resin. Before EVEN TESTING these cells, allow them to sit in full sunlight for 3 hrs or so, and you will find that they will produce approx4.5v (open circuit) and 75-80ma (short circuit). 4 cells wired in series will charge a 12v battery pack @ 50-60 ma. The leads (solar tabbing wire) are VERY FRAGILE. If they are taped on the back, leave the tape and solder your leads to the exposed part of the tab wire. If the lead breaks off, you can scrape the resin coating of of the face of the cell (where the leads attach and glue another piece of tabbing wire directly to the face of the cell with a highly conductive epoxy or glue. As long as the lead touches the UNCOATED face of the cell, it will work again. May lose a LITTLE of the output, but the cell will be saved.

I've used 5 or 6 of these for a year now and they stand up quite well. Performance can be enhanced by about 10% if you put them in the sun for a few hours to 'anneal' the photo layer before connecting it to a load. I wish I'd known that when I deployed the ones I've installed.
Michael

These really are nice little cells. I wish i would have soldered better leads as someone else mentioned. These leads are way to delicate!