High-Speed, High-Performance Photovoltaic / Solar Simulation Power Supply

ITECH’s high-speed, high-performance photovoltaic simulation power supply integrates advanced high-power DC hardware with the SAS1000 solar array simulation platform.

The solution includes more than 200 models covering a wide voltage and current range, with output capabilities up to 2250 V and 2040 A. A single system can address a broad spectrum of application requirements, simplifying model selection for users.

The photovoltaic simulation power supply supports independently adjustable edge times for each operating mode, seamless two-quadrant current switching, and comprehensive protection functions, including OVP, OCP, OPP, OTP, and reverse Vsense protection.

Graphical Software Interface

The system features an intuitive graphical user interface that enables users to easily configure output parameters, perform measurements, monitor the maximum power point tracking (MPPT) status of photovoltaic inverters in real time, and record test data.

Built-in regulatory test procedures compliant with EN 50530, Sandia National Laboratories protocols, NB/T 32004, CGC/GF004, and CGC/GF035 allow users to evaluate both static and dynamic MPPT performance and automatically generate comprehensive test reports for benchmarking purposes.

The solar simulation power supply also includes Shadow Mode and Table Mode:

• Users can define and edit any custom I-V curve using 128 to 4096 programmable points to simulate dynamic shading effects.
• Up to 100 I-V curves under different irradiation and temperature conditions can be stored to evaluate long-term MPPT performance across varying climatic scenarios.

Simulation of Solar Cell Output Characteristics (Fill Factor Control)

Solar cell performance is influenced not only by intrinsic electrical characteristics but also by environmental factors such as season, temperature, irradiation, cloud cover, rain, and snow. As a result, I-V characteristics vary over time.

Photovoltaic inverters must dynamically adjust the operating point of the solar array to ensure operation near the maximum power point (MPP)—a process known as MPPT.

ITECH’s photovoltaic simulation power supply enables precise laboratory simulation of real-world solar array behavior, including Fill Factor configuration, allowing comprehensive validation of both static and dynamic MPPT performance under controlled conditions.

Static and Dynamic MPPT Performance Testing

MPPT tracking capability is a critical performance indicator for photovoltaic inverters. To ensure consistent evaluation across different products, industry organizations have established standardized test profiles.

The built-in MPPT test programs compliant with EN 50530, Sandia National Laboratories protocols, NB/T 32004, and CGC/GF004 enable users to configure parameters such as Vmp, Pmp, material type, test duration, and maximum power percentage.

During testing, the system displays the I-V curve and real-time tracking process on screen, records data throughout the entire test cycle, and automatically generates detailed reports for MPPT performance verification.

Shaded I-V Curve Simulation (Shadow Mode)

ITECH’s photovoltaic simulation power supply allows users to simulate solar array output under various shading conditions to evaluate real-time maximum power tracking and array performance.

The system provides multiple predefined PV module models from different suppliers and also enables users to create custom PV module configurations.

Users can define:

• Irradiation and temperature parameters for shaded areas
• Cell string configurations and parallel quantities
• Dynamic cloud movement direction
• Initialization time, run time, and cloud movement intervals

This advanced shadow simulation capability ensures realistic and repeatable testing of inverter performance under complex environmental conditions.