Solar Loans for MSME Factories: Banks, Tenure, Collateral and the DSCR Lenders Look For
An MSME factory can finance a rooftop solar plant with a bank term loan. Lenders typically fund 70 to 80% of project cost, so you contribute the rest: the two public captive schemes we read ask 20% to 25%. Tenures run to 10 or 15 years, security usually includes the financed assets, and lenders test whether cash flow covers repayments by a margin, often 1.2 to 1.4 times.
Who lends, and on what terms
The table sets out routes with published terms. Terms change, so use it to prepare questions, not to quote a lender. The bank rows were read from the banks' own pages on 27 September 2026 and are shown on our solar finance page. The IREDA rows come from its financing norms updated to 12 June 2026.
| Route | Contribution and amount | Tenure | Security |
|---|---|---|---|
| SBI Surya Shakti Solar Finance (captive) | 20% minimum, deviation not permitted; up to ₹10 crore for captive projects | Up to 10 years, including moratorium | Hypothecation of assets created, negative lien on the factory land and building |
| Indian Bank IND-SURYA SHAKTI | 25% on equipment and erection cost; no ceiling stated | Up to 15 years door to door, 6-month moratorium for rooftop | Financed assets, mortgage of the property the plant sits on, guarantees from partners or directors |
| IREDA rooftop scheme | Normally 70% loan, 30% promoter; up to 75% on creditworthiness. Each application at least 1,000 kWp | Up to 10 years after a 12-month moratorium from COD; up to 15 where private off-takers are rated A- or above | Per IREDA's security norms, including BG or FDR and collateral |
| SIDBI green finance | Through SIDBI offices and partner banks; its 4E scheme funds energy efficiency and needs a detailed energy audit | 4E: up to 36 months for loans to ₹50 lakh, 60 months above | Hypothecation of assets, collateral where necessary, CGTMSE cover if available |
Three points follow. First, IREDA's rooftop scheme is for 1,000 kWp or more per application, so a 100 kW to 500 kW factory plant is normally a bank-loan case. Second, SIDBI's own page says eligible MSMEs can seek rooftop solar finance from banks, financial institutions and SIDBI, but its 4E scheme is for energy efficiency with an energy audit and a three-year operating history, so ask whether solar qualifies. Third, the bank sets the final terms, and a scheme brochure is not a sanction.
DSCR: the number lenders test
The debt service coverage ratio is the cash available in a year for debt service divided by the annual principal plus interest. Cash available is usually profit after tax plus depreciation plus interest on term loans. A ratio of 1.0 only just covers the repayment. IREDA's norms use an average DSCR of at least 1.25 for new solar clients seeking 75% funding and at least 1.2 for 80% funding with conditions on experience and rating. Banks apply their own tests to the whole firm and often to the project.
The project's own cash flow is the yearly electricity saving after maintenance. The table shows how simple payback translates into DSCR. It assumes an 80% loan over 10 years at an illustrative 10% interest, which makes the annual repayment about 13% of project cost. It ignores tax, the moratorium and your contribution, so it is a screening tool.
| Simple payback | Yearly saving as % of project cost | Project DSCR |
|---|---|---|
| 3 years | 33% | About 2.6 |
| 4 years | 25% | About 1.9 |
| 5 years | 20% | About 1.5 |
| 6 years | 17% | About 1.3 |
The pattern is plain. A plant that pays back in three to five years clears a 1.25 test comfortably. At six years the margin is thin, and a fall in self-use or a tariff change can push it under. Test your numbers in the solar EMI calculator and the payback calculator, and keep the savings basis realistic: use the avoided energy charge, not the whole bill.
Collateral, guarantee and MSME status
MSME status helps in two ways. The Ministry of MSME states that from 1 April 2025 the classification limits are: micro up to ₹2.5 crore investment and ₹10 crore turnover, small up to ₹25 crore and ₹100 crore, and medium up to ₹125 crore and ₹500 crore. Check your Udyam registration reflects the current limits.
On collateral, the Ministry's reply to Parliament in July 2026 records that the guarantee ceiling under the Credit Guarantee Scheme for micro and small enterprises was raised from ₹5 crore to ₹10 crore with effect from 1 April 2025, with annual guarantee fees as low as 0.37% a year. It also records the RBI Master Direction of 9 February 2026, under which scheduled commercial banks may not take collateral on loans up to ₹20 lakh to micro and small units. A solar term loan of that size may therefore need none. Larger loans commonly take the financed assets and a lien on the property. Whether CGTMSE cover applies to a given solar loan is for the bank to confirm, so ask.
Documents to prepare
| Group | Typical documents |
|---|---|
| Business | Udyam registration, constitution documents, KYC of promoters, GST registration |
| Financial | Audited accounts and returns for recent years, bank statements, existing loan statements |
| Electricity | Twelve months of bills, sanctioned load or contract demand, connection agreement |
| Roof or site | Ownership or lease documents, owner consent, structural suitability note |
| Project | EPC quotation with BOQ, single-line diagram, generation estimate, payback and DSCR workings |
| Approvals | DISCOM feasibility or application acknowledgement; Electrical Inspector steps if HT |
Banks vary, so ask yours for its checklist first. An EPC quotation that lists make, rating, quantities, payment milestones and warranties is the document lenders lean on most. Our guide to evaluating solar EPC proposals shows what a complete one contains, and the note on CAPEX versus OPEX over ten years frames the alternatives.
How Secured Engineers helps
Secured Engineers is an EPC contractor, not a lender, and it does not decide eligibility or terms. It prepares the technical file a lender asks for: system design, BOQ, generation estimate and commissioning evidence. It designs in-house, files the CEIG and DISCOM net-metering applications in-house, and can combine MEPF and solar under one contract. The company works from offices in Noida (Delhi NCR) and Ludhiana, with 535+ projects across 18+ states and 89.77% repeat clients.
To compare owning with a loan, a third-party model or cash, start on the solar finance page. Then send your bills and site details on WhatsApp, call +91 70099 85817, or ask for a free proposal.
Frequently asked
How much of a solar plant can an MSME fund with a loan?
Lenders typically fund 70 to 80% of project cost, with the borrower putting in the rest. The two public captive schemes on our finance page ask for 20% minimum (SBI Surya Shakti, captive) and 25% on equipment and erection (Indian Bank IND-SURYA SHAKTI). IREDA's norms normally allow up to 70%, and 75% to 80% on conditions. Your lender decides, so get a written term sheet.
What DSCR do lenders look for on a solar loan?
DSCR is annual cash available for debt service divided by annual principal plus interest. IREDA's norms use average DSCR of at least 1.25 for new solar clients seeking higher leverage, and 1.2 for 80% funding with conditions. Banks set their own thresholds and test your firm as well as the project, so prepare both calculations.
Can an MSME get a solar loan without collateral?
Sometimes. The RBI Master Direction of 9 February 2026 bars banks from taking collateral on loans up to ₹20 lakh to micro and small enterprise units, and CGTMSE offers collateral-free guarantee cover up to ₹10 crore for eligible micro and small enterprises. Many solar term loans still take the financed assets, a lien on the property and guarantees. Ask the bank what it needs for your amount.
Does IREDA lend for a small factory rooftop plant?
Not directly for a single small plant. IREDA's rooftop loan scheme requires each application to total at least 1,000 kWp, either from one roof owner or as an aggregator of projects of at least 20 kWp each. A typical MSME factory plant is smaller, so banks and other lenders are the usual route.
Is a solar loan better than paying from my own funds?
It depends on your cost of funds, your other uses of cash and the lender's terms. A loan preserves working capital, but it adds interest, security and covenants, and the borrower still funds 20 to 30% or more. Compare owning with a loan, owning with cash, and a third-party model using the same assumptions, then choose.
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