Everything You Should Know About Solar Financing in India (2026)

For most Bangalore homeowners, the decision to go solar comes down to one question before all others: how do I pay for this?

A quality 5 kWp rooftop system costs ₹2.5–3.5 lakh before subsidy. After the PM Surya Ghar subsidy of up to ₹78,000, you're still looking at ₹1.7–2.7 lakh out of pocket — real money that most families don't have sitting in a savings account earmarked for solar.

The good news: solar financing in India in 2026 is better than it has ever been. There are four distinct ways to pay for a solar system, and for a well-designed system in Bangalore, at least one of them will make the monthly cost lower than your current electricity bill from day one.

This guide explains every option, what the numbers actually look like, and how to pick the right approach for your situation.

The four ways to finance rooftop solar

1. Outright cash purchase
2. PM Surya Ghar-linked bank loan (nationalised banks)
3. NBFC / private lender solar loan
4. Installer EMI plan

Each has different interest rates, timelines, subsidy compatibility, and documentation requirements. Let's go through them one by one.

Option 1: Outright cash purchase

Paying the full system cost upfront delivers the best long-term financial outcome — no interest paid, maximum ROI, fastest payback. After PM Surya Ghar subsidy (₹78,000 credited to your bank account post-commissioning), your net effective cost on a 5 kWp system is approximately ₹1.7–2.4 lakh.

Best for: Homeowners with accessible savings, especially those who are currently earning low returns on fixed deposits (6–7% FD rates vs. 18–22% effective returns from solar).

The subsidy timing factor: The ₹78,000 PM Surya Ghar subsidy arrives in your bank account 30–45 days after commissioning. You pay the full quoted cost upfront to the installer, and the subsidy comes directly to you afterward. Budget for this timing gap.

Option 2: PM Surya Ghar-linked bank loan (nationalised banks)

This is the most popular and financially optimal financing route for most homeowners. The central government has structured concessional solar loans through nationalised banks specifically to reduce the cost of PM Surya Ghar installations.

Interest rates (as of mid-2026)

Rates are floating, linked to RLLR/EBLR. Rates change with RBI repo rate movements. Confirm current rates at the branch before signing.

Key features of PM Surya Ghar bank loans

Collateral-free up to ₹2 lakh. For systems where the loan amount (after subsidy) is ₹2 lakh or less, no property collateral is required. The solar system itself is hypothecated.

Collateral requirement for ₹2–6 lakh: The solar system is hypothecated as security. No separate property pledge typically required in this bracket at most banks.

Zero prepayment penalty. The subsidy (₹78,000) arrives 30–45 days after commissioning, directly to your bank account. You can immediately use it to pre-pay the loan principal — effectively reducing your loan to a small residual at no penalty.

6-month moratorium option. Most banks allow you to defer your first EMI by 6 months after disbursement. This gives time for the system to be commissioned, the subsidy to arrive, and the net metering to be activated before you start paying.

Jan Samarth portal. You can apply online through jansamarth.in — the government's unified loan application platform — to pre-qualify and get routed to the right bank before visiting a branch.

EMI example: 5 kWp system in Bangalore

System cost: ₹2.8 lakh
PM Surya Ghar subsidy: ₹78,000 (arrives post-commissioning)
Loan amount: ₹2.8 lakh (subsidy pre-paid against principal after arrival)
Residual principal after subsidy: ₹2.02 lakh
Loan: ₹2.02 lakh at 7.5% for 5 years
Monthly EMI: approximately ₹4,040

Monthly electricity bill eliminated: approximately ₹2,500–3,200
Net monthly cash outflow during loan period: ₹840–1,540

After 5 years, loan is cleared. For the remaining 20 years, the system generates power at near-zero cost.

Documents typically required:
- Aadhaar and PAN card
- Last 3 months' salary slips or 2 years' ITR (self-employed)
- Last 6 months' bank statements
- BESCOM electricity bill (last 3 months)
- Property ownership proof (sale deed / khata)
- MNRE-empanelled vendor quotation
- PM Surya Ghar portal registration acknowledgment
- BESCOM SRTPV portal application acknowledgment

Processing time: 7–21 working days with complete documents at most nationalised banks. SBI designated solar loan processing branches are faster (some same-week approvals with strong credit profiles).

Option 3: NBFC and private lender solar loans

Non-Banking Financial Companies (NBFCs) and private banks offer solar loans with faster processing and more flexible credit assessment than nationalised banks — at slightly higher interest rates.

When NBFCs make sense

• Your CIBIL score is below 700 (nationalised banks are strict; some NBFCs assess differently)
• You need disbursement within 3–5 working days (NBFCs can move very fast)
• You are self-employed with informal income documentation
• You want a longer loan tenure without property collateral (some NBFCs offer up to 7 years collateral-free)

Indicative NBFC rates (mid-2026)

The home loan top-up route deserves special mention. If you have an existing home loan with SBI, HDFC, or any major bank, you may be eligible for a top-up at your existing home loan interest rate (typically 8.5–9.5%). This is often cheaper than a standalone solar loan, completely collateral-free for existing borrowers, and paperwork-light because your bank already has your documents.

NBFC compatibility with PM Surya Ghar subsidy

NBFC solar loans are compatible with the PM Surya Ghar scheme — the subsidy goes to your bank account regardless of whether you financed through a nationalised bank or NBFC. However, some NBFCs structure their disbursement directly to the installer, so confirm that the subsidy can still be credited to your personal account and used for loan prepayment.

Option 4: Installer EMI plan

Many solar installers — including some operating in Bangalore — offer in-house EMI plans, where the installer or a financing partner manages the credit and collects monthly payments directly.

Convenience: Zero bank paperwork. The installer handles everything. You pay EMIs directly to them.

Caution: The effective interest rates on installer EMI plans are often higher than bank loans — sometimes 18–24% effectively when the cost markup is factored in. Always ask for the "flat rate" and convert it to reducing balance APR before comparing with bank loan offers.

Installer EMI plans make most sense for very small systems (1–2 kWp) where the loan amount is too small for a formal bank loan, or for homeowners who have been declined by banks.

The EMI vs electricity bill calculation — the most important number

The financial case for solar financing is not about interest rates in isolation. It's about this single comparison:

Monthly EMI vs monthly electricity bill eliminated

For a 5 kWp system replacing a ₹3,000/month electricity bill:
- SBI loan (₹2 lakh at 7.5% for 5 years) → EMI: ₹4,040
- Net monthly cash outflow: ₹4,040 − ₹3,000 = ₹1,040 extra per month for 5 years
- After 5 years: ₹3,000+ per month in savings for 20 years (and growing as tariffs rise)

For a 3 kWp system replacing a ₹1,800/month electricity bill:
- SBI loan (₹87,000 residual after subsidy at 7.5% for 3 years) → EMI: approximately ₹2,700
- Net monthly cash outflow: ₹2,700 − ₹1,800 = ₹900 extra per month for 3 years
- After 3 years: ₹1,800+ per month in savings for 22 years

The mathematics consistently favour going solar on a loan over continuing to pay BESCOM — especially with tariffs rising 3–8% every year.

Should you take the subsidy or skip it for a higher export tariff?

This question comes up frequently in financing discussions. Taking PM Surya Ghar subsidy (₹78,000) means your BESCOM export tariff is ₹2.30–2.93/unit instead of ₹3.86/unit (without subsidy).

The calculation for a 5 kWp system in Bangalore exporting approximately 200 units/month:

With subsidy:
- Upfront saving: ₹78,000
- Export earning per month: 200 × ₹2.93 = ₹586
- 25-year export earning: ₹1,75,800

Without subsidy:
- Upfront saving: ₹0
- Export earning per month: 200 × ₹3.86 = ₹772
- 25-year export earning: ₹2,31,600

Difference in 25-year export: ₹55,800 in favour of skipping subsidy.
But you paid ₹78,000 more upfront.
Net result: taking the subsidy is better by ₹22,200.

For smaller systems (3 kWp) with less export, the subsidy advantage is even larger. The general rule: take the subsidy unless you have a specific reason not to.

Commercial and industrial solar financing — a separate track

For business owners installing solar at factories, offices, or commercial premises, the financing approach is different:

Accelerated depreciation: C&I solar assets qualify for 40% depreciation in the first year under the Income Tax Act. For a business in the 25–30% tax bracket, this creates an immediate tax saving of approximately 10–12% of the system cost in Year 1.

Business loan or working capital loan: Solar can be financed through existing business loan facilities, often at rates competitive with home loan products (9–12%).

MSME loans: Small manufacturing and service businesses can access MSME solar financing through SIDBI-linked schemes and state industrial promotion schemes.

Subsidy note: PM Surya Ghar subsidy does not apply to commercial/industrial connections. The financial case for C&I solar is built on accelerated depreciation, tariff savings, and ROI — not subsidy.

Common financing mistakes to avoid

Mistake 1: Choosing a cheaper non-MNRE installer to reduce loan amount, then losing the ₹78,000 subsidy. The subsidy applies only with MNRE-empanelled vendors. A vendor offering ₹20,000 less than competitors but without MNRE empanelment costs you ₹78,000 in lost subsidy.

Mistake 2: Not using the subsidy to prepay the loan. When ₹78,000 arrives in your account, use it immediately to prepay the loan principal. At 7.5% interest, this saves you approximately ₹8,000–12,000 in total interest depending on remaining tenure.

Mistake 3: Choosing a longer tenure than needed. A 10-year tenure on a 5 kWp solar loan looks comfortable in EMI terms, but you pay significantly more interest. Run the numbers at 5 and 7-year tenures before committing.

Mistake 4: Not factoring in tariff escalation. Your EMI is fixed. Your electricity bill savings grow every year as BESCOM tariffs rise. A system that saves ₹2,500/month today saves ₹4,000–5,000/month in Year 10. The financial case gets stronger over time, not weaker.

Quick decision framework

Sunvana Energy works with multiple bank partners and can help you identify the right financing path for your home and income profile. We handle the complete documentation — from PM Surya Ghar registration to bank loan submission. Contact us for a free assessment.

MNRE Empanelled | BESCOM Approved Vendor | Residential, Commercial & Agricultural Solar

Interest rates as of mid-2026; all bank rates are floating and linked to RBI repo rate. Confirm current rates directly with the respective bank before signing. EMI calculations are illustrative and vary based on exact loan amount, credit profile, and disbursement date. Subsidy amounts as per PM Surya Ghar scheme guidelines; subject to revision by MNRE.