Quick Facts
What Tier-1 means
Tier-1 solar panel is a bankability classification by BloombergNEF (BNEF), the energy research arm of Bloomberg LP. The classification indicates manufacturers whose solar modules have been used in at least six different solar projects funded by six different non-recourse project finance banks in the past two years.
The Tier-1 classification is a financial bankability rating, not a technical quality rating. It reflects the manufacturer’s track record of producing modules that global lenders are willing to accept as collateral and that the lenders trust will perform for the 25-year project life.
The list is updated quarterly by BNEF. Manufacturers can be added or removed each quarter based on their qualifying project finance activity. The list typically contains 30 to 60 manufacturers globally.
For Indian solar projects, Tier-1 is commonly used as a baseline qualification criterion in tenders, lender’s due diligence, and corporate procurement. It is often combined with ALMM listing (the Indian regulatory equivalent), BIS certification, and PVEL scorecard for comprehensive module evaluation.
How BNEF determines Tier-1
The BNEF Tier-1 list uses a specific methodology:
The manufacturer must have supplied panels for at least six different solar projects in the past two years.
The six projects must have been financed by six different commercial banks on a non-recourse basis (project finance, not corporate loans).
The deals must be at arm’s length.
The methodology is intentionally focused on financial bankability rather than module technical specifications. The reasoning: lenders won’t accept a manufacturer’s modules unless they trust the manufacturer’s financial strength and warranty support. The Tier-1 classification captures this market validation.
A manufacturer that produces technically excellent modules but has not yet built six bank-financed deal history may be Tier-2 or Tier-3 despite excellent products. Conversely, an established manufacturer in financial decline may lose Tier-1 status before any product quality issue manifests.
Indian Tier-1 manufacturers in 2026
Indian manufacturers on the BNEF Tier-1 list as of 2026 include:
Adani Solar: Adani Group’s solar manufacturing arm. Long-standing Tier-1 with global project supply.
Vikram Solar: Established Indian manufacturer with diverse project exposure.
Waaree Energies: Largest Indian solar manufacturer by capacity, Tier-1 globally.
Tata Power Solar: Tata Group’s solar manufacturer, Tier-1.
Premier Energies: Growing Tier-1 presence under PLI scheme.
Reliance Industries: Tier-1 entry through PLI-supported capacity addition.
The list of Indian Tier-1 manufacturers has grown over the past 5 years as Indian manufacturing scale and quality have matched global standards. Several smaller Indian manufacturers are positioned to enter Tier-1 in coming quarters as their project finance footprint expands.
Tier-1 versus ALMM
Tier-1 and ALMM are complementary classifications.
Tier-1: Global financial bankability per BNEF. Based on project finance history.
ALMM: Indian regulatory approval per MNRE. Based on BIS certification, manufacturing capacity, quality systems, and financial standing.
For Indian solar projects with government subsidy: ALMM is mandatory. Tier-1 is preferred but not strictly required (unless specified in tender).
For Indian solar projects with international lender financing: Tier-1 is typically required. ALMM is preferred if subsidies are involved.
For exports out of India: Tier-1 status matters globally; ALMM is India-specific.
Most established Indian manufacturers hold both Tier-1 and ALMM, simplifying procurement decisions.
Tier-1 in lender’s due diligence
When lenders evaluate a solar project for financing, Tier-1 module status is one of several criteria:
Module manufacturer: Tier-1 with PVEL scorecard data.
EPC contractor: ISO 9001 certified with project track record.
Plant design: Reviewed by independent engineer.
Performance projections: Validated by lender’s technical advisor.
Insurance: All-risk insurance from established carriers.
Long-term O&M: Contract with reputable operator.
Tier-1 modules contribute to lender confidence but do not by themselves secure financing. The overall project structure matters.
Tier-1 limitations
Tier-1 has well-known limitations:
It is not a quality rating. Tier-1 modules can have field reliability issues; Tier-2 modules can be excellent.
It is a lagging indicator. A manufacturer’s financial decline may not show in Tier-1 status until well after the decline begins.
It favours large established manufacturers over innovative newcomers. New manufacturers with excellent technology may take years to build the project finance footprint required for Tier-1.
It is a global standard. Regional manufacturing realities (such as China’s mass production scale) may distort comparison.
It changes quarterly. A Tier-1 designation today may not apply 6 months later.
For these reasons, Tier-1 should be combined with other quality indicators (PVEL scorecard, technical certifications, field reliability data, customer references) for comprehensive module selection.
Common mistakes with Tier-1
Treating Tier-1 as a quality rating. It is not.
Assuming all Tier-1 modules are equivalent. Different Tier-1 manufacturers vary in product quality, warranty support, and reliability.
Excluding Tier-2 manufacturers reflexively. Many Tier-2 products are excellent and competitively priced.
Relying solely on Tier-1 for module selection. Combine with PVEL scorecard, ALMM, and reference checks.
Forgetting the quarterly update. A 2-year-old Tier-1 list may include manufacturers since dropped.
Best practices
For lender-financed projects: Specify Tier-1 modules as a baseline qualification.
For self-financed CAPEX: Tier-1 is preferred but not strictly required. Other quality indicators may suffice.
For comprehensive module selection: Combine Tier-1 status with PVEL scorecard ranking, ALMM listing, IEC certifications, and customer references.
Verify Tier-1 status against the most recent quarterly BNEF list.
For new manufacturer evaluation: Tier-2 or Tier-3 status is not disqualifying. Evaluate the manufacturer’s product quality and financial strength separately.
Standards and references
The BloombergNEF Tier 1 List is published quarterly and maintained by BNEF (a Bloomberg LP company). Methodology is documented in BNEF’s research notes. Subscription access provides the full list; summary lists are sometimes published more widely. Alternative bankability frameworks include PVEL scorecards and S&P Global ratings.
Related glossary terms
- ALMM
- BIS for Solar Modules
- IEC 61215 Standard
- IEC 61730 Standard
- Mono PERC
- TOPCon Solar Panel
- HJT Solar Panel
- Bankable EPC
- ISO 9001 in Solar EPC
Key takeaways
Tier-1 solar panel is a bankability classification by BloombergNEF indicating manufacturers whose modules have been used in at least six different solar projects funded by six different non-recourse banks in the past two years. The classification reflects financial bankability and global project finance acceptance, not technical quality. Tier-1 is commonly required in lender’s due diligence and many tender qualifications. It is one of several module quality indicators alongside ALMM, BIS, PVEL scorecards, and IEC certifications, and should be combined rather than used in isolation for module selection.