What are the Standard Test Conditions (STC) for measuring module power?

An irradiance of 1000 W/m², a cell temperature of 25°C, and a reference solar spectral irradiance of Air Mass 1.5 (AM1.5) as per Clause 3.1.

What is the minimum requirement for the mechanical load test?

The module must withstand a uniform static load of 2400 Pa (equivalent to wind pressure) applied cyclically to both its front and back surfaces without major defects (MQT 16).

What is the pass criterion for power degradation after reliability tests?

The measured maximum power output (Pmax) after the test sequence shall not be less than 95% of the value measured before the tests (Clause 7.1).

What is the purpose of the wet leakage current test?

It evaluates the module's insulation against moisture ingress under wet conditions (like rain or dew), which is critical for preventing shock hazards and ensuring user safety (MQT 11).

IS 16300

: 2016

Photovoltaic (PV) modules for power generation - General requirements and methods of test

CurrentEssentialSpecificationMEP · Solar and Renewable Energy Installations

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This standard specifies the requirements for design qualification and type approval of crystalline silicon terrestrial photovoltaic (PV) modules suitable for long-term operation. It defines the testing procedures to assess the performance, safety, and reliability against environmental factors like UV radiation, temperature, humidity, and mechanical loads. This code is critical for ensuring module quality in the Indian solar industry and is harmonized with international IEC 61215 and IEC 61730 standards.

Specifies general requirements for photovoltaic (PV) modules intended for power generation, including material, construction, and basic testing.

Quick Reference Values

Standard Test Condition (STC) Irradiance1000 W/m²

Standard Test Condition (STC) Temperature25 °C

Standard Test Condition (STC) Air MassAM 1.5

Minimum Insulation Resistance40 MΩ·m²

Standard Mechanical Load Test Pressure2400 Pa

Enhanced Mechanical Load Test Pressure5400 Pa

Power Output Tolerance after tests< 5% degradation from initial Pmax

Key Formulas

Pmax = Vmp × Imp — Maximum Power Calculation

Insulation Resistance (MΩ·m²) = (Measured Resistance in MΩ) × (Module Area in m²)

Practical Notes

Compliance with this standard is mandatory for modules to be listed in the ALMM (Approved List of Models and Manufacturers) by MNRE, a prerequisite for use in most government-backed projects in India.

This standard covers crystalline silicon (c-Si) modules only. For thin-film modules, refer to IS 16077.

Pay close attention to the prescribed test sequence in Table 1, as the order of tests is designed to simulate lifetime stresses and is crucial for valid qualification.