Within this project, it is intended to design and implement a web-based wireless photovoltaic monitoring system that can measure important parameters for photovoltaic power systems and perform performance calculations and comparisons of the modules. A webbased, low-cost wireless monitoring system using the Zigbee wireless communication protocol has been developed, taking into account the International Electrotechnical Commission (IEC) standards. Thanks to this developed Zigbee based monitoring system, the data in the power plant can be recorded without any loss without regard to weather conditions. It also has the necessary infrastructure for various emergency scenarios. At this point, the investor can access the system from any device with internet access, regardless of where in the world. As a result of the tests made, there is no data loss between the receiver and the transmitter in this developed system. Emergency systems, which are developed as solutions to electricity or internet interruption problems, prevent data losses.