Our portable solar power-supply box is an excellent multi-purpose power system, and it is designed reasonably, in light weight, small cubic content, high power, high conversion efficiency and multiform power supply, and it is the embodiment of new safety green energy. The portable solar power-supply box is at 300 W unitized with monocrystalline silicon solar module, accumulator, controller, cabinet, 10W energy-saving lamp and chargers. Its AC is 220v, and DC is 12v, 6v and 3v, and it has continuously adjustable voltage-output at 0~11v and 1. 4v for AA/AAA battery, and 4. 2v for different kinds of cell phone lithium batteries. It can be used in different equipments and circumstances, such as car, ship, field operation, high work above the ground, long-distance traveling and household appliances, and other non-power areas, such as forestry, sea island, sentry, grassland, desert, mountainous area and village.