In order to centrally manage and schedule distributed photovoltaic plant better

based on RS-485 bus architecture

a remote data monitor system combined with ZigBee and 3G dual-wireless technology is proposed for photovoltaic plants. The system firstly acquire data of internal short distance key facilities in photovoltaic is designed by ZigBee wireless networks

and the collected data is uploaded to the master controller. Then

master controller save the data and at the same time activate the module of 3G to launch the data to remote database server. Finally

remote server connects to Internet and communicates with host computer which uses Browser/Server（ B/S） software design mode without any barriers. This designed system has good applicability and scalability.