Yingli Green Energy's 60-Cell monocrystalline solar panels have a high energy rating of 17%. Yingli's Panda Series uses 2 layers of n-type silicon instead of the standard p-type silicon thus allowing the solar panel to absorb light from both the front and back side of the panel.
Yingli's solar street light uses a 60W solar panel to illuminate a 15W LED light. It comes with a 12V/65AH battery with an intelligent exclusive controller and can be programmed for automatic on/off at certain hours. Yingli's Solar Street Light can work continuously for eight (8) hours daily and is able to function for five (5) days during cloudy or rainy weather.