Is this standard the same as IEC 61215?

Yes, IS 16170:2016 is a dual-numbered standard and is technically identical to the IEC 61215:2016 series (Part 1 and Part 2).

What is the purpose of the Damp Heat (DH) test?

To assess the module's ability to withstand long-term exposure to high temperature and humidity. It checks for degradation from moisture ingress, such as corrosion and delamination (Clause 10.11).

What is the typical power degradation limit after testing?

The maximum power output (Pmax) must not degrade by more than 5% compared to the initial value after the completion of the test sequences (MQT 19).

What does the Mechanical Load Test simulate?

It applies a static pressure of 2400 Pa (or higher, e.g., 5400 Pa for heavy snow) to simulate the stress from wind and snow loads and ensures the module does not suffer physical damage or significant power loss (Clause 10.16).

IS 16170 Part 1

: 2016

Photovoltaic (PV) modules - Design qualification and type approval - Part 1: PV modules

CurrentEssentialTesting MethodMaterials Science · Solar and Renewable Energy Installations

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This standard specifies the requirements for the design qualification and type approval of terrestrial photovoltaic (PV) modules for long-term operation in open-air climates. It defines a series of stringent tests, including thermal cycling, damp heat, and mechanical load tests, to evaluate a module's performance, safety, and resistance to environmental degradation. This is the primary standard used for BIS compulsory registration of PV modules in India.

Specifies requirements for design qualification and type approval of PV modules suitable for long-term operation in general open-air climates.

Quick Reference Values

Damp Heat Test Condition1000 hours at 85 °C and 85 % R.H.

Thermal Cycling Test Condition200 cycles between -40 °C and +85 °C

Humidity Freeze Test Condition10 cycles between +85 °C / 85% R.H. and -40 °C

Standard Test Condition (STC) Irradiance1000 W/m²

Standard Test Condition (STC) Temperature25 °C

Wet Leakage Current Insulation Requirement> 40 MΩ·m²

Mechanical Load Test Standard Pressure2400 Pa (equivalent to ~130 km/h wind)

Key Formulas

Power Degradation (%) = ( (Pmax_initial - Pmax_final) / Pmax_initial ) * 100

Practical Notes

This standard is technically identical to the international IEC 61215 series (2016 version), simplifying global compliance for manufacturers.

Compliance with this standard is mandatory for selling PV modules in India under the Compulsory Registration Scheme (CRS) by BIS.

The test sequence (e.g., Damp Heat 1000h, Thermal Cycling 200) is a critical benchmark for assessing the long-term reliability and 25-year design life of a module.