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A90DC-12B String Monitor


Obvius’ A90DC series Solar PV String Monitor allows owners and integrators of PV systems to monitor the performance of each string or sub array of Solar PV systems. Obvius puts the “smart” in combiner boxes.

Additional Information

Solar PV String Monitor A90DC-12

Obvius’ A90DC series is a twelve string DC current monitor used in smart combiner boxes that detects when panels in a Solar PV system are underperforming. The A90DC series can monitor configurations of 12, 10, 8, 6 or 4 strings using non-contact Hall Effect sensors. The A90DC series also includes a 4-20 mA input for monitoring voltage, ambient temperature or irradiance. The A90DC series provides open communications via Modbus RS-485 and can be easily retrofitted into existing combiner boxes.

The A90DC Series string monitor is compatible with virtually any Modbus Master. Use with the Obvius AcquiSuite to take advantage of plug-and-play communication or use with the Obvius ModHopper for wireless communication. Ask about the Obvius Configuration Console, a free commissioning software.


  • DC current monitoring
  • Operations and Maintenance tool
  • String monitoring for Photovoltaic (PV) systems
  • Monitor key panel performance and production parameters
  • Quickly identify panel issues
  • Alarm notification to key personnel
  • DC module for OEM smart combiner box manufacturers
  • Battery monitoring

Features and Benefits
  • Designed specifically for DC monitoring of Photovoltaic (PV) systems
  • Easily add to any Modbus RTU network
  • 4-20 mA input for monitoring voltage, ambient temperature, or irradiance
  • Alarming for troubleshooting field issues
  • Ability to daisy chain up to 32 devices (expandable)
  • UL Recognized
  • LEDs for visual verification / status
  • Field upgradable firmware