SORAS LS – Steady-state solar simulator for PV modules

In certification laboratories for photovoltaic modules, steady-state solar simulators are mostly used for stabilization / light soaking tests (MQT 19) and hot-spot endurance tests (MQT 09) according to IEC 61215 and IEC 61730. An initial stabilization is required for all PV modules that undergo a standard test procedure. For the hot-spot endurance test (MQT 09), it is important that the operator has easy access to the front and back site of the module. During the test, it is necessary to shade one cell after each other to take infrared pictures, which requires good visibility of the entire back side. Our swiveling module holding system enables easy access to the front and back side of the module.

Due to our cooling system, we can stabilize the temperature in the light chamber at 50°C.

During the shading of the single cells, the standard requires tracing an IV curve for each shaded cell. With our IV curve tracer “IVCT”, it is possible to plot all IV curves in one graph, which eases the process of identifying the most critical cells for hot-spot effects in the module.


Technical specifications

Test area 2.2 m × 1.2 m
Intensity 1000 W/m²
Classification BBA
Relevant tests MQT 09, MQT 19.1 MQT 19.2
Relevant standards IEC 61215, IEC 61646, IEC 61730

Key Facts

  • BBA steady-state solar simulator
  • Capable of light soaking / stabilization test, hot-spot endurance test, temperature test, power measurements
  • Closed room system, preventing any irradiation in the test room
  • Easy access to the front and back side of the module
  • Operational 24/7

Software features from IVCT

  • Intuitive graphical user interface for full remote control of the test stand
  • Irradiation sum counter for stabilization tests
  • Adding calibration values
  • Connecting up to four temperature sensors to the module
  • Automated correction to standard test conditions (STC)
  • Multi-IV curve tracing functions for hot-spot testing
  • Scheduled IV curve tracing in defined time intervals between MPPT