Its modular design supports easy embedding, broad inverter compatibility, and OTA remote learning, making it a trusted arc fault detector adopted by over 60 manufacturers for reliable, low-maintenance operation. Main Feature Modular design, each module can support 4 channels at the same time;;Independent arc detection for each channel, arc alarm threshold can be set;Integrated current measurement;Modbus interface with standard protocol to indicate faulty arc channels;Support. The combiner box monitoring system provides monitoring and management for each device in a solar power generation system. It can monitor the status of surge protectors and circuit breakers without an external power supply. Product Section Table FR-DCMG DC monitor products are mainly used in DC power transmission and distribution, such as photovoltaic combiner boxes, DC cabinets, telecommunications equipment rooms and communication base stations. Its main function. Fonrich (Shanghai) New Energy Technology Co. was founded in 2011, with a technology-oriented focus on PV new energy field, our products cover PV Smart Module Level Safety Protection Systems, PV Module Smart Optimization Systems, DC Arc Fault Detector, PV Smart Combiner box.