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Development of audit and energy management system in the industrial automation and intelligent building installation has been observed over many years. Electrical energy monitoring system is now using real-time measurement facility via wireless network applications. In this paper we consider an application of star topology wireless sensor network for single phase electricity monitoring system based on Energy Meter IC ADE7753. Zigbee is used as wireless protocol. It has many benefits such as low cost, low power, low data rate, and supports on mesh-networking IEEE 802.15.4. For web-server monitoring system, Ext-JS framework is used as client-side programming which is integrated with IDE Arduino. Statistically, for sample of 30 data measurement, it is shown that current measurement gave guarantee of accuracy value until 5.3μArms with average precision error of 0.03%, and voltage measurement gave guarantee of accuracy value until 226.5μVrms with average precision error of 1.23%. Effectively, data measurement occurs in the intervals of 10 seconds and a transmission maximum of 40 meters with barrier and 60 meters without barrier.