How Indian Banks and DFIs Are Financing BESS Projects in 2026
Battery energy storage projects in India face a financing challenge that solar and wind projects, which have been banked for over a decade, do not: lenders have limited experience with storage technology risk, and the asset class lacks the track record needed for standard project finance templates to apply without modification.
This is changing rapidly. By 2026, IREDA (Indian Renewable Energy Development Agency), PFC (Power Finance Corporation), REC Limited, and several large commercial banks have all developed BESS project financing products, and a cohort of successfully financed projects is beginning to build the precedent needed for market-standard terms to emerge.
This article explains how BESS project finance in India works today: the debt structures available, the security package lenders require, the technology risk provisions that determine bankability, and how to position a BESS project for competitive financing.
The Financing Landscape: Who Is Lending
IREDA is the most active DFI for BESS project finance in 2026. IREDA has explicitly identified battery storage as a priority asset class and has developed an internal BESS underwriting framework. IREDA typically lends at 9.0–10.5% fixed or floating (linked to IREDA's benchmark lending rate), for 15-year tenors at 70–75% LTV. IREDA has financed several SECI VGF projects and is the reference lender for the asset class.
PFC and REC are larger entities with broader mandates (traditional focus on generation and transmission), but both have entered BESS lending in response to Ministry of Power direction. Their BESS products are newer and their internal credit frameworks less developed than IREDA's, but they offer scale for larger projects (above ₹500 crore) where IREDA's exposure limits may bind.
SBI Capital Markets (acting as lead arranger for SBI group lending) has structured syndicated BESS project finance for select large projects, targeting the ₹300–800 crore ticket size. SBI's commercial terms (lending rate, security requirements) are generally more conservative than IREDA — reflecting commercial bank risk appetite versus development finance mandates.
HDFC Bank and Axis Bank have entered BESS finance for smaller C&I projects (₹10–100 crore ticket size, captive storage for industrial consumers). These facilities are typically structured as equipment loans with simpler security packages than utility-scale project finance.
International Development Finance (ADB, World Bank IFC): Both ADB and IFC have committed to BESS financing in India. IFC has financed one standalone BESS project through a local currency bond structure. ADB's India energy portfolio includes a BESS line of credit facility for on-lending through IREDA. These institutions bring concessional rates (8.0–9.0% effective in INR terms after currency hedging) and longer tenors (20 years), but have procurement and ESG requirements that add complexity.
Debt Structures for Different BESS Revenue Models
The debt structure appropriate for a BESS project depends critically on how the project earns revenue:
1. VGF + Ancillary Services (No Fixed Offtake)
The SECI VGF scheme provides an upfront capital grant, not an ongoing revenue guarantee. Projects receive VGF and then earn from ancillary services and wholesale market participation — a merchant revenue stream.
Lenders treat merchant revenue as inherently uncertain. For VGF projects, lenders typically:
- Size debt against 70% of projected ancillary service revenue, not 100%
- Require a 6-month debt service reserve account (DSRA) funded at financial close
- Apply a 1.25–1.35x Debt Service Coverage Ratio (DSCR) minimum
- Require revenue insurance or guarantee instruments for the first 3 years
LTV ratios for VGF projects: 60–70% (lower than regulated-tariff projects because of revenue uncertainty)
2. DISCOM Tariff-Based Offtake (MSEDCL, GUVNL Model)
Projects with a signed 12-year tariff agreement with a state DISCOM have predictable cashflows and are significantly more bankable. The offtake agreement is the primary credit collateral, and lenders are essentially underwriting the DISCOM's payment obligation.
Key question: What is the DISCOM's credit rating and payment history? MSEDCL and GUVNL have strong credit profiles by DISCOM standards (relatively low payment delays). Other state DISCOMs — particularly in UP, Rajasthan, and Chhattisgarh — have weak credit profiles that require state government guarantees before lenders will lend against their offtake.
For DISCOM-offtake BESS projects with strong state credit:
- LTV: 70–75%
- Debt tenure: 12–15 years
- Lending rate: 9.0–10.0%
- DSCR covenant: 1.15–1.25x
- Security package: Mortgage on land and fixed assets, hypothecation of receivables, escrow account, step-in rights
3. C&I Captive BESS (Industrial Borrower Credit)
For BESS installed as captive assets by industrial consumers, project finance is not typically used. The industrial consumer borrows against their corporate credit for an equipment loan:
- Ticket size: ₹10–100 crore
- Tenure: 5–7 years
- Rate: Corporate lending rate + 50–100 bps (currently 11–13% for mid-rated corporates)
- Security: Equipment hypothecation, corporate guarantee
Technology Risk: The Key Bankability Challenge
Every BESS lender in India has the same concern: will the battery system actually perform over the loan tenure? This is the defining bankability challenge that differs BESS from solar, where lender comfort with PV technology is mature.
Lenders address technology risk through three mechanisms:
1. Technology due diligence report: A third-party report (from DNV, CRISIL, Bureau Veritas, or similar accredited consultants) assessing the proposed technology — cell chemistry, cycle life claims, thermal management, BMS architecture, track record of the equipment supplier — and providing an independent opinion on whether the asset will perform as modelled.
Technology due diligence costs ₹15–30 lakh and takes 8–12 weeks. It is a pre-financial-close requirement for virtually every BESS project finance deal in India. The findings of the due diligence report directly affect LTV ratios and debt pricing — projects using equipment with extensive track records receive better terms than projects using first-time or newly introduced equipment.
2. Performance warranty coverage: Lenders require that the equipment supplier (or a creditworthy third party) provide a performance warranty covering cell capacity retention, round-trip efficiency, and availability for the debt tenure. Crucially, the warranty must be backed by a creditworthy entity — a warranty from a small Indian integrator without balance sheet depth does not satisfy lenders. Warranty providers should have net worth of at least 20% of the warranted asset replacement cost.
3. Debt service reserve account (DSRA): A ring-fenced account holding 6 months of debt service, accessible by the lender if BESS performance falls below threshold and revenues decline. The DSRA is funded at financial close (from equity or via DSRA guarantee from a bank) and maintained throughout the loan tenure.
What a Well-Structured BESS Project Finance Package Looks Like
For a 100 MWh DISCOM-offtake BESS project in Gujarat (GUVNL tender):
| Parameter | Value |
|---|---|
| Project cost | ₹110–130 crore |
| Debt (70% LTV) | ₹77–91 crore |
| Equity | ₹33–39 crore |
| Debt provider | IREDA or SBI consortium |
| Debt rate | 9.5–10.0% (IREDA benchmark) |
| Debt tenor | 12 years (matching offtake) |
| DSCR covenant | 1.20x minimum |
| DSRA requirement | 6 months debt service (₹5–8 crore) |
| Technology due diligence | DNV or Bureau Veritas, pre-drawdown |
| Performance warranty | Equipment supplier warranty, 12 years |
| Security | Mortgage on GETCO substation land easement, receivables hypothecation, escrow |
The project's equity IRR at ₹9.0–9.5/kWh tariff, with current LFP system costs and IREDA debt: approximately 14–16% post-tax. This is consistent with the returns required by Indian RE infrastructure developers and is comfortably above the WACC.
Building Lender Relationships Early
The single most important financing action for BESS developers in India today is engaging with IREDA's project finance team before the RfS stage — not after LoA. IREDA has an internal BESS working group that is actively seeking to build deal flow, and developers who engage early receive guidance on what documentation and technology specifications IREDA's credit committee will require. This reduces the risk of surprises at financial close and shortens the time from LoA to drawdown.
For developers planning SECI VGF or state DISCOM BESS projects, SilicIndia Energies provides equipment that is designed to meet the technology risk requirements of Indian DFI lenders: IEC 62619 certification, established cycle life test data, performance warranty backed by our balance sheet, and technology due diligence familiarity from DNV and Bureau Veritas. This equipment foundation makes our customers' projects more bankable. Contact our project team to discuss how equipment selection affects your financing terms.
