Conrad miniature monopolycrystalline solar cells 05v 18v 35ma 800ma conrad yh 75x90 this mini solar cell polcrystalline 180v 40ma from conrad is ideally suited for experiments as well as providing a power supply independent of the mains for small consumers or for charging batteries to reach the desired voltage and current the module can be switched individually in parallel or in a series simply via the corresponding soldering pads available on the back side conrad yh 75x90 mini sol