Analysis of Photovoltaic Solar Cell IV Tester

ChinTiyan New Energy's photovoltaic cell IV tester is a professional device dedicated to testing the electrical performance of photovoltaic modules and cells. Its core function is to simulate sunlight exposure, accurately measuring the current output characteristics of the cell at different voltages, generating IV characteristic curves, and then evaluating key parameters such as maximum power point, open-circuit voltage, short-circuit current, and fill factor. The following analysis focuses on three dimensions: technical features, application scenarios, and product series:

I. Technical Features: High Precision and Full-Spectrum Simulation

Spectral Matching and Irradiance Control: ChinTiyan New Energy's IV tester utilizes an AAA-grade solar simulator with a spectral range of 300-1200nm, simulating real-world sunlight conditions. The device automatically calibrates the light intensity using standard components, ensuring a STI (Sensitivity to Irradiance) of <0.2% and a LTI (Light Intensity Tolerance) of <1%. This meets the IEC60904-9 2020 industry standard and is suitable for full-spectrum testing of crystalline silicon cells (PERC, N-type, TOPCon, HJT, etc.) and thin-film cells (CIGS). Four-wire measurement and temperature compensation equipment uses a four-wire connection to eliminate interference from wire resistance on current measurement, ensuring uA-level current accuracy. Furthermore, it is equipped with an infrared non-contact temperature measurement module for real-time module temperature monitoring and automatic correction of test results, preventing the impact of temperature fluctuations on data.

Dynamic scanning and defect detection support both Isc→Voc and Voc→Isc scanning directions, dynamically capturing the current-voltage response of the cell. Some models (such as the CT500) integrate a floating frame display that automatically indicates defects such as hidden cracks and poor soldering, helping to quickly locate quality issues.

II. Application Scenario: Covering the Entire Chain from R&D to Production and Operation and Maintenance

End-of-Production Line Inspection: During the cell or module production process, IV testers are used to verify that products meet design power specifications. For example, the CT1000 series equipment boasts a throughput of less than 5 seconds per cell, efficiently completing electrical performance testing of pre- and post-lamination modules to ensure a high pass rate before shipment.

Power Plant Construction Acceptance: During the construction phase of a photovoltaic power plant, IV testers analyze the module's IV curve to determine whether hot spot effects or fill factor degradation exist. For example, a step in the curve may indicate a hidden crack in the cell, while a shift in the maximum power point is associated with a hot spot effect.

For R&D laboratory analysis of new cell technologies (such as perovskite and HJT), IV testers can measure parameters such as series resistance and shunt resistance, assisting in studying microscopic properties such as carrier recombination mechanisms and interfacial charge transfer efficiency.

III. Product Series: Differentiated Designs Meet Diverse Needs

High-Efficiency Model: CT1000 Series

Features: Direct-beam structure, supports top-lighting and side-lighting installation modes, adjustable pulse width from 10-100ms, and a testable area of ​​2600mm x 1600mm.

Applicable Scenarios: Module testing for large-scale ground-mounted power plants, compatible with high-efficiency modules such as MBB, half-cell, and stacked modules.

Portable Model: Portable IV tester

Features: Lightweight, compact, supports outdoor testing, equipped with a radiometer and temperature sensor, and real-time data upload to the cloud.

Applicable Scenarios: Acceptance testing for distributed photovoltaic projects and rooftop power plant operation and maintenance. Research-oriented: All-in-one EL/PL testing machine for perovskite cells

Features: Integrated electroluminescence and photoluminescence detection capabilities, capable of analyzing defect state distribution, carrier lifetime, and more in perovskite materials.

Applicable scenarios: University laboratories, new material R&D institutions.

Price: Requires customization, typically higher than conventional models.

IV. Selection Recommendations: Match equipment to your needs

Small laboratories with limited budgets: Choose a portable IV tester, balancing cost and basic functionality.

High-efficiency module production lines: Recommend the CT1000 series, which meets the needs of large-size modules and high throughput.

R&D of new cell technologies such as perovskites: Customized all-in-one EL/PL testing machines are required to obtain more comprehensive material property data.

ChinTiyan New Energy's IV testers, with their high-precision spectral simulation, dynamic defect detection, and differentiated product design, have become essential tools for quality control and technological innovation in the photovoltaic industry. Users can select the most suitable model based on their specific application scenario, budget, and technical requirements.