These miniature solar cells are ideal for experiments as well as for off-grid power supplies for small consumers or for charging batteries. To achieve the desired voltage and current, the modules can be easily connected individually or in parallel or series. There are corresponding solder pads on the back for this purpose. These miniature solar cells are available in a monocrystalline version. The monocrystalline cells have a uniformly dark color and are made from a single silicon crystal. Compared to the polycrystalline cells with a recognizable crystal structure, the monocrystalline cells have a slightly better efficiency.