Series PV5 all in one solar street lamp features an integrated design, which combines the solar panel, lithium battery, controller, and LED light into a single unit. PV5 integrated solar street light achieves an overall illumination efficiency of 220lm/W. Its high luminous efficiency reduces power consumption while maintaining the same illumination, thereby significantly lowering the demands on solar panels and batteries which finally reduce the cost. Its monocrystalline silicon solar panel has a conversion efficiency of 23%, and lithium battery can withstand over 2000 charge-discharge cycles. The PV5's integrated design and efficient utilization of solar energy make it the ideal choice for lighting in remote areas and underdeveloped regions without access to the grid.