This site is a 42 MW self-generated large rooftop solar power plant, encompassing a total of 30 factory roofs, including 328 inverters and 3,280 solar modules. The electrical infrastructure across the area is quite complex and intricate. The factory roofs are divided into six zones, each with specific configurations; some utilize "grid internal wiring without reverse power feed," while others employ a partial "selling excess electricity to the grid."

In terms of communication, since it is built on the factories of end users, establishing a physical network is not an easy task and requires collaboration with network service providers. We co-designed a wireless access point (Access Point) solution that allows installers to read information from all solar devices on each roof without interfering with factory operations. Additionally, a master-slave architecture was adopted to achieve "grid internal wiring without reverse power feed" control across rooftops and transmit PQIV data to the TNB SCADA system. By using the thingnario software solution, we successfully overcame various challenges in on-site construction, enabling the EPC team to execute the project efficiently and with reduced workload.