Solar street lamp is a type of street lamp working with solar power. Solar street light does not rely on grid power, it does not need cable arrangement and not need to consume normal electric power, It works if there is sunshine. With such advantages, solar street lights are widely used everywhere. Solar street light does not pollute the environment. so it's regarded as enery-saving and eco-friendly products. Solar street lights can not only be used normal street lights in parks, roads, villas and so on, but solar street lights can also be used to the areas with small population distribution, inconvenient transportation, lack of conventional fuel and hard to make use of grid power. To reduce the capacity of solar panels and batteries to save the cost, LED street lights are always used to work with solar system. This combination can greatly reduce the cost of solar street lights and make full use of solar energy.