Solar Loans in India: Financing a Rooftop System Without Big Upfront Cash

A solar system can reduce your electricity purchases for years, but the installed cost comes first. A loan spreads that cost into instalments. The decision then becomes practical: can your household or business carry the EMI even in months when solar output is low?

For a 3 kW to 5 kW home project, the subsidy normally follows installation and commissioning. You may need to fund the earlier stages through savings and a loan. Some lenders finance 80% to 90% of the installed cost, but the available share, margin and security depend on the product and your application.

Before you sign an installation or loan agreement, compare the rate, fees and repayment schedule with a conservative bill-saving estimate. The same discipline applies to a commercial facility, although business loans have different credit checks and security requirements.

What a rooftop solar loan pays for

A solar term loan can cover modules, the grid inverter, mounting structure, protection equipment, installation and bidirectional metering. Banks may offer a dedicated rooftop product, an equipment loan or another approved facility. Read the sanction letter to see exactly which costs it includes.

The solar equipment may be hypothecated to the bank. For eligible PM Surya Ghar home systems up to 3 kW, nationalised banks have offered loans without separate collateral, as PIB reported on 28 July 2026. Other products can require different security, income proof or a co-applicant.

After your roof and electrical connection are assessed, the bank reviews the proposal and your credit file. It may release funds to the registered installer at agreed milestones, such as equipment delivery, mounting and final DISCOM commissioning. Confirm the disbursement schedule in writing so it matches the installation contract.

Compare home and business borrowing

A homeowner and a factory owner should expect different loan limits, tenures and approval checks. The figures below describe the options discussed here, not a quote from a lender. Ask for a dated repayment schedule for your actual application.

Loans for residential rooftops

For an eligible PM Surya Ghar home system up to 3 kW, the nationalised bank offer reported by MNRE and PIB on 28 July 2026 was a 10-year, collateral-free loan at repo rate plus 0.5%. That was 5.75% a year on the report date. A floating rate can move with the repo rate. Larger home systems, private bank loans and NBFC products have their own pricing and credit terms.

Loans for commercial and industrial sites

Factories, schools and hospitals may use equipment finance or MSME green energy credit, including products from lenders such as SIDBI. The comparison here uses business tenures of 5 to 10 years, with rates decided by the lender. If you are choosing between owning the plant and paying a developer for energy, read our CAPEX and OPEX solar comparison alongside the loan offer.

Test the EMI against bill savings

Put the EMI and estimated bill reduction on the same monthly schedule. If the expected reduction is greater than the EMI, the project may help cash flow early. Still allow for cloudy months, fixed DISCOM charges and any tariff or export rule that reduces the value of your units.

Take an illustrative 3 kW on-grid system in Andhra Pradesh. At an annual average of about 4 to 4.5 units per kW per day, 1 kW might produce 1,400 to 1,600 units a year. That works out to about 360 to 400 units a month in this example for the 3 kW installation. Your roof survey should refine that estimate.

Suppose the household previously paid ₹3,200 a month. In the example, a correctly sized home on-grid system cuts 80% to 90% of the bill, or about ₹2,600 to ₹3,000 each billing cycle. A five-year loan at an illustrative 8% rate has an estimated EMI of ₹2,400 to ₹2,800. Compare the actual bank schedule and post-solar bill, including fixed charges, before treating this as a cash-flow gain.

During the five-year repayment period, add the remaining grid bill to the EMI to understand your total monthly outgo. After the loan ends, the panels still need cleaning and service. Their 30-year performance warranty is useful, but it is not a promise of zero bills or a fixed saving.

Use the subsidy in your loan plan

PM Surya Ghar: Muft Bijli Yojana lists central financial assistance for eligible residential systems. Its stated implementation period runs to 31 March 2027. Check current scheme rules and your eligibility before using these amounts in a loan calculation:

• A 1 kW home system: ₹30,000 of central assistance.
• A 2 kW home system: ₹60,000 of central assistance.
• A home system of 3 kW or more: up to ₹78,000, which is the cap.

The lender generally works from the project cost and your required margin, shown here as about 10% to 20%. Do not assume the subsidy pays the installer before work starts. Once the plant has been commissioned and the required portal steps are complete, the approved amount is transferred to your linked bank account through DBT.

Subsidy eligibility requires DCR modules and a registered vendor, along with the applicable DISCOM and portal process. Commercial and industrial projects do not receive this residential subsidy. The PM Surya Ghar application guide explains the steps in more detail.

Check eligibility and collect documents

Each lender sets its own credit conditions. The points below are a preparation list drawn from common applications, not a promise of approval. Confirm any age, score or property rule with the bank you choose.

Applicant and property checks

• Applicant: The example lender profile is a resident Indian aged 21 to 65, with salaried, professional or business income.
• Credit history: A CIBIL score around 680 to 700 may help with concessional pricing, but lender thresholds differ.
• Roof rights: Show clear ownership or co-ownership of the building receiving the system.
• Electricity account: Keep an active residential connection in the applicant's name and settle any outstanding dues.

Documents to prepare

• Identity: Aadhaar and PAN copies for the applicant and any co-applicant the bank requires.
• Address and ownership: A property tax receipt, registered sale deed or municipal assessment, as accepted by the lender.
• Electricity record: The last three months of bills, showing your service number and sanctioned load.
• Income: Salaried applicants may need three months of salary slips and Form 16. Self-employed applicants may need two years of ITRs, income computations and six months of bank statements.
• Project: A technical quotation and roof feasibility estimate from the solar EPC firm.

Apply in the right order

Keep the loan, installation and subsidy applications aligned. Missing a document at commissioning can delay both the lender's final payment and the subsidy credit.

1. Survey the site: Ask Ray2Volt for a power audit covering bills, connected load and around 80 to 100 sq ft of usable roof per kW.
2. Register the project: Enter your consumer number at the PM Surya Ghar portal and choose a registered vendor.
3. Apply for credit: Use Jan Samarth or the lender's branch process and provide KYC, income documents and the solar quotation.
4. Read the sanction: Check the approved amount, rate type, EMI, margin, fees and disbursement milestones before accepting it.
5. Install the system: Ray2Volt fits the DCR modules, grid inverter, mounting and earthing equipment against the approved design.
6. Complete DISCOM checks: Arrange inspection, bidirectional meter installation and commissioning documentation.
7. Claim the assistance: Submit the required commissioning details through the portal. If the subsidy is approved and credited, decide with the bank how to apply it to principal.

Read the fine print before borrowing

Request a repayment schedule and a complete list of charges. Then revisit the solar generation estimate with your actual daytime use and current DISCOM settlement rules.

Part-prepayment: Ask whether a subsidy payment can reduce principal without a penalty, and whether the bank will reduce your EMI or the remaining tenure.

Floating or fixed rate: A repo-linked rate can change. Ask how often the bank resets it and what happens to your EMI or tenure after a reset.

Processing cost: Include documentation fees, stamp duty and any insurance the bank requires. A fee waiver is useful only if it appears in your written offer.

System size: Too little capacity leaves more of your bill in place; too much may send units to the grid at a lower export value. Use real consumption records when reviewing solar payback calculations.

Questions about solar loans

Ray2Volt Solar Private Limited

We design, install, and service rooftop solar for homes and businesses across Tirupati district and Andhra Pradesh, from PM Surya Ghar residential systems to commercial and industrial plants. Every enquiry starts with a free power audit.