Financing solar in India, honestly

The concessional PM Surya Ghar loan, regular bank rates, the EMI maths that decides whether solar pays for itself from month one — and the financing traps installers rarely mention.

Most Indian households do not pay cash for rooftop solar, and in 2026 they do not need to. The PM Surya Ghar: Muft Bijli Yojana pairs its subsidy with a concessional, collateral-free loan from public-sector banks, and regular solar loans cover everything the scheme does not. The maths can genuinely work — a well-sized system on a cheap loan can be cash-flow positive from the first month. But it only works if you run the numbers honestly: on the full pre-subsidy price, at the real interest rate, against realistic bill savings. This guide walks through all of it, including the parts loan brochures skip.

The PM Surya Ghar concessional loan

Under the scheme, residential consumers installing rooftop systems up to 3 kW can get a collateral-free loan of up to ₹2 lakh from public-sector banks at a concessional rate. The scheme designed this around roughly 7% per annum (repo rate + 0.5%); because it is repo-linked, quoted rates in 2026 have drifted with RBI cuts — public-sector banks have been advertising anywhere from about 5.75% to a little over 7%. Treat ~7% as the planning number and verify the live rate with your bank before signing.

Eligibility

• You are a residential consumer applying (or approved) on the pmsuryaghar.gov.in portal for a system up to 3 kW.
• The house and electricity connection are in your name (or a co-applicant arrangement your bank accepts).
• You install through a DISCOM-empanelled vendor with compliant equipment — the loan rides on the subsidy application, and the subsidy has its own rules, covered in our PM Surya Ghar subsidy guide.
• Banks still run a basic credit check. Collateral-free does not mean credit-score-free; a weak CIBIL history can mean rejection or a co-applicant requirement.

How to apply and what processing looks like

1. Register on the PM Surya Ghar portal and get feasibility approval from your DISCOM.
2. Apply for the loan through the JanSamarth portal (linked from the scheme portal) or directly at a public-sector bank branch — SBI, Canara, Union Bank, PNB, Bank of Baroda and others participate.
3. Submit documents (list below). Sanction for scheme loans is typically quoted in days to a couple of weeks; disbursement usually goes to the vendor against the installation milestones, not to your account.

Regular solar loans beyond ₹2 lakh

If your system is larger than 3 kW, or you want to borrow more than ₹2 lakh, you move to ordinary lending. Typical 2026 options:

All of these figures move with the repo cycle — verify with your bank or DISCOM-empanelled vendor at the time of application.

The honest EMI maths

Every EMI comes from the same formula, and it is worth seeing it once so no financier can hand-wave at you:

Worked example: you borrow ₹1.5 lakh at 7% for 10 years. Monthly rate is 0.0058333, n is 120, and the EMI works out to about ₹1,742 per month (total interest over the decade: roughly ₹59,000). If your 3 kW system is replacing ₹2,500–3,000 of monthly electricity purchases, you are cash-flow positive from month one: the panels save more than the loan costs. That is the honest version of the ‘free electricity’ pitch — and it is genuinely true when the savings number is real. It stops being true if your bill was only ₹1,200 to begin with, if your tariff slab is low, or if the system underperforms. Estimate your actual generation and savings first with the India solar calculator or the on-grid calculator, then compare against the EMI.

The subsidy-timing trap

This is the single most misunderstood part of solar financing in India. The PM Surya Ghar subsidy is not a discount at purchase. It arrives by Direct Benefit Transfer (DBT) into your bank account after the system is installed, inspected and commissioned by the DISCOM — typically a few weeks after commissioning when everything goes smoothly, longer when it does not. That means:

• Your loan (or your cash) is taken on the full gross system price. For a ₹1.8 lakh 3 kW system, you finance ₹1.8 lakh, not ₹1.02 lakh.
• When the ₹78,000 subsidy lands, the smart move is to prepay it straight into the loan principal. Scheme loans from public-sector banks generally carry nil foreclosure and part-prepayment charges (confirm in your sanction letter), so this immediately shrinks either your EMI or your tenure.
• Until the DBT arrives, you are paying EMI on the full amount. Budget for 2–3 months of full-principal EMIs as the realistic case.

The truth behind ‘zero down’ offers

Installers advertising ‘₹0 down, own solar for the price of your bill’ are not giving anything away. The financing cost is rolled into the system price, and in many cases the quoted price itself is inflated to absorb the dealer’s financing commission. The offer can still be reasonable — but you can only tell by normalising the comparison:

Vendor financing vs a bank loan

Vendor or NBFC financing wins on convenience: one signature, quick approval, no branch visits. Bank loans win on price: 7% versus 11–14% is a difference of tens of thousands of rupees over a tenure, and banks cannot hide costs inside the hardware price. A sensible default: take the scheme loan for systems up to 3 kW, a bank loan or home-loan top-up above that, and use vendor financing only if speed genuinely matters more than roughly ₹20,000–40,000 of extra cost.

Prepayment rules

Floating-rate loans to individuals for non-business purposes — which covers most residential solar loans — cannot carry foreclosure penalties under RBI rules, and PM Surya Ghar scheme loans are generally explicitly nil-charge. Fixed-rate personal loans and NBFC products can carry prepayment charges of 2–4%. Since your whole subsidy-prepayment strategy depends on this, get the prepayment clause in writing before you sign.

Documents banks typically ask for

• Identity and address proof (Aadhaar, PAN)
• Recent electricity bills showing the connection in your name
• Proof of house ownership
• Income proof — salary slips/ITR for larger loans; scheme loans up to ₹2 lakh are lighter-touch
• The vendor’s proforma invoice/quotation and your PM Surya Ghar portal application or feasibility approval
• Bank statements (usually 6 months) and a passport photo

Common mistakes

• Financing the net-of-subsidy amount on paper. The loan is on the gross price; the subsidy arrives later by DBT. Plan the EMI accordingly.
• Comparing a flat rate with a reducing-balance rate. A ‘6% flat’ vendor loan is roughly an 11% real loan. Always compare reducing-balance APRs.
• Not prepaying when the subsidy lands. Leaving ₹78,000 in your savings account at 3% while paying 7–11% on the loan burns money every month.
• Taking a 10-year tenure by default. Longer tenure means lower EMI but far more interest; if savings comfortably exceed the EMI, a shorter tenure usually wins.
• Judging ‘zero down’ offers by the monthly payment alone instead of total cost at identical system specs.
• Skipping the fine print on prepayment charges in NBFC and vendor financing agreements.

Frequently asked questions

What is the interest rate on the PM Surya Ghar solar loan in 2026?

The scheme was designed around roughly 7% per annum (repo + 0.5%) for collateral-free loans up to ₹2 lakh from public-sector banks, for residential systems up to 3 kW. Because it is repo-linked, 2026 quotes range from about 5.75% to just over 7% depending on the bank — verify the live rate with your bank before applying.

Can I get the loan for the amount after subsidy is deducted?

No. The loan is sanctioned against the full gross system price because the subsidy only arrives by DBT after commissioning. The standard strategy is to borrow the full amount, then part-prepay the principal the moment the subsidy is credited — scheme loans generally carry no prepayment charges.

Is a ₹1,742 EMI really lower than my bill savings?

It can be. ₹1.5 lakh at 7% over 10 years gives an EMI of about ₹1,742, and a well-sited 3 kW system commonly offsets ₹2,500+ of monthly electricity purchases at typical urban tariffs. But it depends entirely on your tariff, your consumption and real generation at your site — run your own numbers before believing any installer's version.

Are zero-down solar offers a scam?

Not necessarily, but they are never free. The financing cost is built into the system price, which is often inflated to cover the dealer's commission. Compare every quote net of subsidy, per kW, at identical specifications, including the total interest paid — that is the only fair comparison.