Current Status Analysis
The growth of the photovoltaic (PV) new energy industry has increased the demand for measurement and testing solutions for solar cells (and modules) and photovoltaic inverters. With advancements in solar cell technology toward higher efficiency, larger sizes, and higher power density, traditional testing equipment can no longer meet the requirements for power and current handling. Particularly for industrial-grade high-power components (e.g., modules above 300W), solutions combining electronic loads and programmable DC power supplies have become mainstream due to their flexibility, high-power processing capabilities, and cost-effectiveness.
Key Testing Procedures
1. I-V Curve Testing
Environmental factors such as ambient temperature, irradiance intensity, and light variations significantly impact the I-V characteristics and conversion efficiency of solar cells. Accurate I-V parameter acquisition requires multi-point voltage measurements over time.
OWON's OEL8500 Series DC Electronic Load enables precise measurement of critical parameters, including:Open-Circuit Voltage (Voc),Short-Circuit Current (Isc),Maximum Power Point (Pmax),Voltage at Pmax (Vmax),Current at Pmax (Imax),Fill Factor (FF).With high-speed sampling, the device ensures data accuracy under dynamic environmental conditions.
The OWH67 Series Programmable DC Power Supply, paired with PV curve simulation software, can simulate I-V characteristic curves of solar panels under various environmental conditions (e.g., temperature, irradiance, shading attenuation, aging).
2. Static MPPT Testing
MPPT (Maximum Power Point Tracking) is a critical metric for evaluating photovoltaic inverters. It verifies whether the inverter can continuously track and maintain operation at the solar cell's maximum power point (Pmax).
The OWH67 Series Programmable DC Power Supply and PV curve simulation software support static MPPT efficiency testing.
3. Standards Compliance
The OWH67 Series PV Simulator integrates advanced DSP real-time control technology to embed photovoltaic theoretical models, replacing traditional piecewise linear simulation methods for higher precision. It complies with international standards such as EN50530 and Sandia PV curve models, generating regulatory-compliant test reports tailored for photovoltaic inverter certification scenarios.
Testing Equipment
Software Support
The OWH67 Series Programmable DC Power Supply, when paired with PV curve simulation software, offers comprehensive I-V curve simulation capabilities. It accurately emulates the I-V characteristics of solar panels under diverse environmental conditions and enables Static MPPT efficiency testing. Equipped with built-in EN50530 and Sandia PV curve models, this system comes standard with PV curve simulation software. It supports multi-unit power supply control and MPPT tracking tests, delivering an efficient and reliable testing solution for users.
Hardware Support
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OEL8500 Series DC Electronic Load |
Key Features: High-speed measurement (μs-level response). High precision (16-bit resolution). |
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Key Features: Scalable power up to 9kW, 300A, 600V. Modular design for parallel configurations. |
