Best of system (B.O.S) is the global company that specializes in designing and manufacturing the power supply, which products of high reliability result from the most advanced technique of the aerospace and the military. We always take the technology of inverter as the core for many years, the products include Conversion Power Supply (widely used electric power, communication, Locomotive), Frequency Conversion Power Supply, Aviation Military Special-purpose Power Supply (400Hz frequency conversion, 28.5 Direct-current power), Uninterruptible Power Supply (UPS), Emergency Power Supply (EPS) and new energy generation green power supply (solar energy and wind power system) etc. In order to develop Chinese market, the B.O.S Corporation cooperates with the Jinan ACKE in establishing the China manufacturing center, which is named the Shandong BOS Power Supply Co.,Ltd. The company not only provides high ratio with function & price for the global customers, but also concentrates in providing the omni-directional power supply solution for the Chinese customers. The B.O.S Corporation possesses of multiterm national patent about power supply, and has passed national astronautics quality certification center astronautics ISO9001 (2000) international quality systems certification. The specialized design troop, 100% product examination, the best service system have been winning the widespread customers and the market share. At present, the B.O.S products not only export to Canada, but also export to USA, HongKong, Corea, Cuba, Korea, Malaysia, Indonesia, Pakistan, Bangladesh and other countries. And these products have been widely used in Aerospace, Electric, Railroad, Medical, Test facility, Communication, Solar energy and wind power system etc. In addition, the research department has broken through the difficulty about parallel connection of domestic high power inverter, which makes the B.O.S power supply maximum power reach 1500KVA and fill the domestic blank.