A String Monitoring Box is a device commonly used in solar photovoltaic (PV) farms to monitor and control the performance of groups of solar panels, known as 'strings.' It collects real-time data such as voltage, current, and power output from each string, enabling operators to quickly identify and address issues like underperformance, faults, or disconnections. By providing granular visibility into the operation of multiple panel strings, the String Monitoring Box helps optimize energy production, improve maintenance efficiency, and enhance the overall reliability of the solar installation. It often features communication interfaces for remote monitoring and integration with broader energy management systems.