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String Monitoring Solutions

The string monitoring unit (SMU) precisely records all electrical data of a PV generator in real time regardless of the inverter in use and can monitor up to four status-signaling contacts. This ensures the continuous monitoring of the direct current side of PV systems. Data can be recorded smoothly with the Modbus RTU protocol and the provided RS485 interface. The SMU is compatible with all data loggers or controllers.


  • Measurement of 8 to 24 individual strings, 16 to 48 strings with double assignment
  • Error recognition in the PV generator on the string level
  • Precise, real-time measured value recording
  • Compatible with system voltage levels of up to 1,500 V DC
  • Manufacturer-independent, open Modbus RTU protocol
  • Comprehensive status monitoring

Your Benefits

  • Highly flexible system design
  • Detection of even small yield losses – assurance of yields on the string level
  • Cost-efficient monitoring of the direct current side of your PV system
  • Future-proof hardware also for system designs with 1,500 V DC
  • Effortless connection to any SPS or data logger
  • Time and cost savings through simplified commissioning process

Local/Remote SCADA with Weather Monitoring Solutions

RSS India solar data loggers are plug ‘n’ play, the most flexible, robust, and scalable IoT devices that provide you full access for Monitoring ‘n’ Control.

These solar data loggers are compatible with all Grid-Tie, Hybrid and Off-Grid setups, Solar Water Pumping and Building Loads, energy meters, weather sensors, string monitoring systems, switchgear and analog, digital, and MODBUS enabled sensors.