IS 16170: India Solar Inverter Performance Standard

Definition

IS 16170 is the Indian Standard for solar PV inverter performance and acceptance criteria. Required for ALMM listing alongside IS 16221 (safety).

Key Takeaways

IS 16170 = Indian inverter performance standard.
Companion to IS 16221 (safety).
Required for ALMM List II (inverters).
Aligned with IEC standards.

What IS 16170 Covers

IS 16170 sets the performance and acceptance criteria a solar PV inverter has to meet before it can be considered compliant for the Indian market. In practice, this means confirming that an inverter actually delivers the output, efficiency, and grid-interaction behavior its manufacturer claims on the datasheet — as opposed to IS 16221, which focuses on whether the inverter is electrically safe to install and operate. The two standards are companions by design: a design consultant checking equipment for a project typically looks for both references on an inverter’s test certificate, since ALMM listing depends on satisfying both.

Why It Matters for Project Documentation

ALMM List II (inverters) is the list a project’s equipment has to appear on for many government-linked and subsidy-eligible solar installations in India, and IS 16170 compliance — alongside IS 16221 — is a prerequisite for that listing. This has downstream effects on documentation: when a project goes through CEIG approval, the equipment cut sheets submitted alongside the SLD and earthing drawings need to show BIS-approved, ALMM-listed inverters, and IS 16170 is one of the two standards those approvals rest on. Skipping this check at the design stage is a common source of late-stage rework when a spec’d inverter turns out not to be listed.

Because IS 16170 compliance feeds directly into equipment eligibility for Indian solar projects, it’s worth reading alongside our state-by-state breakdown of solar permit processing times in India, which shows how inverter and module compliance documents move through DISCOM and CEIG review in practice. For a deeper look at how IS 16170 fits into the wider Indian regulatory picture — including how it lines up against IEC equivalents — QBits Energy’s guide to BIS and IEC compliance for solar inverters in India is a useful companion resource.

Frequently Asked Questions

5 commonly searched questions about IS 16170.

What is IS 16170?

IS 16170 is the Indian Standard covering the performance and acceptance criteria for solar PV inverters. It sets out how an inverter's rated performance is verified before it can be listed as compliant for the Indian market, and is required for ALMM listing.

How is IS 16170 different from IS 16221?

IS 16170 addresses performance and acceptance testing — confirming an inverter performs to its rated specifications. IS 16221 addresses electrical safety. Both standards work together, and a grid-tied inverter typically needs to satisfy both before it can be BIS-certified and ALMM-listed.

Why does IS 16170 matter for ALMM listing?

ALMM List II covers inverters, and inclusion on that list requires manufacturers to demonstrate compliance with IS 16170 (performance) alongside IS 16221 (safety). Projects that need ALMM-listed equipment — including most government-linked and subsidy-eligible solar installations in India — can only use inverters that meet both standards.

Do all solar inverters sold in India need IS 16170 certification?

Any inverter that needs to appear on the ALMM list, or that a DISCOM or CEIG authority requires to be BIS-certified, needs to meet IS 16170 alongside IS 16221. Design consultants typically check both standards on inverter datasheets before specifying equipment for a project.

Who tests and certifies inverters against IS 16170?

Compliance is verified through BIS-recognized testing labs as part of the overall BIS certification process for solar equipment in India, the same certification pathway that supports ALMM listing.