IS 16170

IS 16170 is the Indian Standard that module manufacturers, energy modellers and EPC procurement teams refer to when comparing how PV modules perform outside standard test conditions. This entry explains what the standard measures and how it differs from the module qualification and inverter standards it is often confused with.

Key Takeaways

• IS 16170 = Indian adoption of IEC 61853 for PV modules.
• Measures module power across irradiance and temperature.
• Performance data, not a durability or safety test.
• Not an inverter standard: inverters use IS 16221 and IS 16169.

What Does IS 16170 Cover?

IS 16170 describes how to test a PV module’s performance over the range of conditions it meets in the field, rather than only at the 1,000 W/m² and 25°C of STC. Part 1 builds a matrix of power measurements at different irradiance and temperature levels.

Later parts of the IEC 61853 family add spectral response, angle-of-incidence effects and module operating temperature, which together feed an energy rating. Verify which parts BIS has adopted against the current BIS catalogue before citing them in a specification.

How Designers Use IS 16170 Data

Energy yield software such as PVsyst relies on low-irradiance and temperature behaviour to model losses. Module test data produced to IEC 61853 or IS 16170 gives a more reliable basis for those parameters than datasheet assumptions.

For compliance, the module checks on an Indian project are BIS registration based on IS 14286 and IS/IEC 61730, plus ALMM enlistment where the scheme requires it. Inverter safety sits under IS 16221.

Related Reading

For how equipment certification affects approvals, see solar permit processing times in India and the BIS Solar entry.