Solar energy photovoltaic power supply Considering that most of forest protection spots are located at deep mountains, far from electricity grid, permanently without electricity, our company self studied, designed and manufactured TSD-2A solar energy photovoltaic power supply proprietary for forests. It used modern technology transferring solar energy into electric energy, specially designed for forests with high quality, multiple functions. It solved difficulties of using light in night, watching TV, cellphone charging, and flashlight charging for forest ranger. It is widely accepted. It was named as â??light emissaryâ?? by forest rangers. Features of this power supply: low pressure, convenient for installation and transportation, with reliable and stable capability. The system can assure 3 to 5 days continually supplying electricity in raining weather. The whole system of the power supply is 12V low pressure direct current, without fire hazard when using, multiple functions, and convenient; it can carry 3 to 4 energy-saving lamps, can receive satellite programs or broadcasting, can charge to cellphone, and etc. it efficiently solved difficulties of forest rangers using electricity.