String combiner box is a phenomenal product that is a combination of surge protective device, dc switch and string monitoring system, and is placed between the pv sources and inverters. It helps in measuring the input vis-à-vis output of the solar energy yield and monitoring the plant safety, working on the mechanism of automatic disconnection of the defective strings. Features customized string monitoring system. web-based monitoring system. automatic string fault detection. available in different sizes. available options for self-testing of main components.