India BIS Mandates New PID Test for TOPCon Modules

On May 14, 2026, the Bureau of Indian Standards (BIS) issued Notification No. BIS/ET/2026/047, mandating that all TOPCon photovoltaic modules applying for BIS certification under IS 14286:2026 must comply with the updated PID recovery test method specified in IEC TS 62804-1 Ed.3:2026 — effective August 1, 2026. This development directly affects solar module exporters, certification laboratories, and supply chain stakeholders serving the Indian market.

Event Overview

On May 14, 2026, the Bureau of Indian Standards (BIS) published Notification No. BIS/ET/2026/047. The notification stipulates that, starting August 1, 2026, all applications for BIS certification under standard IS 14286:2026 for TOPCon photovoltaic modules must use IEC TS 62804-1 Ed.3:2026 for potential-induced degradation (PID) recovery testing. Under this method, modules must demonstrate ≥95% power recovery after a 96-hour stress test at 85°C and 85% relative humidity. The previous edition (Ed.2) is no longer accepted for new submissions.

Industries Affected

Direct Exporters (Especially Chinese TOPCon Module Manufacturers)

These companies face immediate procedural impact: the new test method extends type-testing duration by 7–10 days per batch. As IS 14286:2026 certification is mandatory for market access in India, delays may disrupt shipment schedules or cause temporary certification gaps — particularly for smaller manufacturers with limited testing capacity or narrow certification renewal windows.

Testing Laboratories & Certification Bodies

Laboratories accredited to perform BIS-conforming tests must update their test protocols, equipment calibration, and reporting templates to align with IEC TS 62804-1 Ed.3:2026. Accreditation scope extensions may be required, potentially affecting turnaround time and capacity allocation for TOPCon-specific testing.

Supply Chain & Logistics Service Providers

Providers managing documentation, customs clearance, and conformity assessment support for solar exports must verify that submitted test reports explicitly reference IEC TS 62804-1 Ed.3:2026 and include full recovery rate data. Inconsistencies may trigger verification delays at Indian customs or BIS review stages.

Key Focus Areas and Recommended Actions

Monitor Official Updates on Implementation Guidance

While the notification sets August 1, 2026 as the effective date, BIS may issue clarifications on transitional arrangements, grandfathering of pending applications, or acceptable evidence formats. Stakeholders should subscribe to BIS official bulletins and track updates via authorized Indian certification partners.

Prioritize Testing Scheduling for Upcoming Submissions

Manufacturers planning IS 14286:2026 applications between June and July 2026 should allocate additional buffer time (minimum +10 days) for PID recovery testing. Early engagement with accredited labs — especially those already validating Ed.3-compliant setups — is advised to avoid bottlenecks.

Distinguish Between Policy Effective Date and Operational Readiness

The August 1, 2026 deadline applies to application submission dates, not test report issuance dates. However, test reports must be generated using Ed.3 methodology. Companies should confirm with labs whether pre-August test reports based on Ed.3 will be accepted for post-August submissions — this remains subject to BIS interpretation.

Review Documentation Alignment Across Product Lines

Exporters supplying multiple module technologies into India should verify whether the Ed.3 requirement applies exclusively to TOPCon modules under IS 14286:2026, or whether future revisions may extend it to other cell architectures. Current scope is limited to TOPCon modules covered by IS 14286:2026; no expansion beyond that is confirmed.

Editorial Perspective / Industry Observation

Observably, this notification reflects BIS’s increasing alignment with the latest international technical specifications for high-efficiency PV technologies — particularly where field reliability concerns (e.g., PID susceptibility in N-type cells) are evolving. Analysis shows the shift is less about introducing new failure modes and more about tightening pass/fail criteria (≥95% recovery vs. earlier thresholds), thereby raising the bar for quality consistency. From an industry perspective, it signals growing regulatory attention on performance durability metrics — not just initial electrical parameters — in emerging markets. It is currently a compliance requirement with defined implementation timing, not merely a signal: the effective date is fixed, and the test method is formally referenced. Continued monitoring is warranted for potential downstream effects on procurement terms, warranty clauses, and tender evaluation criteria in Indian utility-scale projects.

This notification underscores how localized regulatory updates — even those referencing international standards — can introduce tangible lead-time and operational constraints across global solar supply chains. Its significance lies not in novelty of the test itself, but in the binding enforcement timeline and its specific applicability to a fast-growing module technology segment. It is best understood as a targeted, time-bound compliance adjustment — not a broad policy shift — requiring focused operational response rather than strategic repositioning.

Source: Bureau of Indian Standards (BIS), Notification No. BIS/ET/2026/047, issued May 14, 2026.
Note: Transitional provisions, lab accreditation status for Ed.3, and acceptance of pre-August test reports remain subject to ongoing observation and official clarification.