Bankability

What “Bankability” Actually Tests

Bankability isn’t a single test a project passes or fails — it’s the composite judgment a lender’s credit committee and its Independent Engineer reach after reviewing the full risk picture. In practice that judgment rests on three pillars:

1. Will the plant produce the energy the model says it will? This is where the EYA and its P90 cash-flow scenario carry the most weight — lenders size debt service to the conservative case, not the median expectation, because loan repayments have to clear even in a below-average irradiance year.
2. Will the equipment still be working, and warrantied, 20+ years from now? Tier 1 status is a shorthand for this, but the underlying question is manufacturer solvency and enforceable warranty terms — not just a name on a bankability list.
3. Is there a creditworthy counter-party actually going to pay for the power? A technically sound plant with an uncertain off-taker (a financially weak DISCOM, an unsigned PPA) is not bankable no matter how good the EYA looks.

A project can be strong on one pillar and still fail overall — a beautifully modeled EYA doesn’t offset a shaky off-taker, and Tier 1 modules don’t offset a P50-only yield study. Independent Engineers are hired specifically to stress-test all three together before a term sheet gets signed.

Bankability Checklist

• ✓ Bankable EYA (PVsyst + independent engineer review).
• ✓ P90 cash flow covers debt service.
• ✓ Tier 1 modules and inverters with long warranties.
• ✓ Creditworthy off-take counter-party (utility, IPP).
• ✓ Long-term PPA or PPA-equivalent visibility.
• ✓ Land tenure secured.
• ✓ Permitting and interconnection cleared.
• ✓ Reputable EPC with track record.
• ✓ O&M contract with performance guarantees.

Illustrative Example — Where a Project Can Stumble

Consider a mid-size ground-mount project seeking senior debt. The developer submits a PVsyst-based EYA showing strong P50 output, sources Tier 1 modules with standard warranties, and has land secured. On paper this looks solid — but the Independent Engineer flags two gaps during review: the EYA doesn’t present a clear P90 case (only P50 is shown), and the PPA off-taker is a DISCOM with a history of delayed payments. Neither issue is about the hardware; both are about the reliability of the cash flow the lender is being asked to underwrite. The fix isn’t a better inverter — it’s re-running the yield assessment to a P90 confidence level and either securing payment-security mechanisms (letters of credit, escrow) or accepting a smaller debt sizing against the weaker counter-party risk. This is the kind of gap an EYA review process is designed to surface before a term sheet is signed, not after.

Key Takeaways

• Bankability = lender willingness to finance.
• Requires EYA + Tier 1 equipment + PPA + IE review.
• P90 cash flow must cover debt service.
• Independent Engineer review key step.
• Tier 1 designation is the equipment baseline.

Related Reading

Bankability is ultimately a judgment about whether the underlying engineering and project package will hold up under lender scrutiny, which is why EPCs increasingly bring in third-party design and diligence support before a term sheet is on the table. For a broader look at what that support covers end to end, see the complete guide to solar design services in India, and for the specific question of who to trust with that scope, how to choose a solar design partner walks through the vetting criteria lenders and developers both care about. On the financial-modeling side, SECI tariff math shows how the same rigor that makes an EYA bankable — accurate engineering inputs feeding the cash-flow model — also moves competitive tariff bids by fractions of a rupee per unit.