This thesis is to create a power inverter for connection to the electrical system by the inverter's Output voltage then there is 220V 50 Hz frequency, there are no less than 100 Watts is the same phase. Electricity and electrical energy supply system can be into electricity. The trial results will be น็ by Wen that the energy use while not connected, can pay a load 99 Watts and costs of energy consumption, while the parallel inverters are connected to the electrical system can supply load 95 w, which has 4 watts of energy lost due to phase shifting of electric voltage. Approximately 18 degrees.
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