Wireless Telemetry for Real-time Monitoring of Photovoltaic Application System using Monopole Antenna 3DRobotics Radio 915 MHz

Wireless monitoring system for photovoltaic (PV) application system was conducted in 1 kWp of a solar power plant in the Electrical Engineering Laboratory, Universitas Jenderal Achmad Yani. Photovoltaic performance needs to be monitored per day, month, even yearly, so that the data generated can be used for evaluation and other diagnostic purposes. Online monitoring is widely used for certain needs, in this paper we will discuss real-time monitoring of PV performance based on 3DRobotics Radio 915 MHz monopole antennas to send data actually. The antenna was tested based on 3.5dB gain, resulting in path loss 57.65 dB and the receiver antenna power measurement results were -45.87 dBm. Current and voltage sensors are used to obtain PV power and are processed using a microcontroller, while to measure losses due to environmental factors temperature sensors and light sensors are also used in this system. The current, voltage, power, temperature and level of sunlight displayed by nextion LCD touch screen 4.3 in, this system is equipped with a memory card as a back-up if offline monitoring is more desirable.