PM Surya Ghar Yojana — Free Solar Rooftop

💰Cost Breakdown — What You Pay After Subsidy

📅Installation Timeline — From Application to Free Electricity

💡Real-Life Scenarios — How Much Will Your Bill Drop?

Amit's 1 kW system (Bangalore, south-facing): Avg generation 120 units/month. Amit's previous bill: ₹1,200-1,500.

After solar: ₹200-400 (only for night consumption, off-peak grid charges). Monthly savings: ₹1,000.

Annual savings: ₹12,000. System cost after ₹30K subsidy: ₹40K.

Payback: 3.3 years. 25-year lifetime savings: ₹2.8 lakh.

Priya's 3 kW system (Delhi, good sunlight, 30 sq.m. roof): Avg generation 350 units/month (25+ peak sun hours). Priya's previous bill: ₹3,500-4,000 (₹10-11 per unit, expensive Delhi tariff).

After solar: Some months ₹0 (fully solar), others ₹200-500 (seasonal variation). Annual savings: ₹36,000-42,000.

System cost after subsidy: ₹1.20 lakh. Payback: 2.8 years. 25-year savings: ₹7.2 lakh.

Raj's 2 kW system (Chennai, coastal city): Humid, occasional cloud cover. Avg generation 280 units/month.

Raj's previous bill: ₹3,000. After solar: ₹800-1,200.

Monthly savings: ₹1,800-2,200. Annual: ₹21,600-26,400.

Payback: 4.2 years. Lifetime: ₹5.4 lakh.

Higher humidity impacts efficiency slightly, but still highly economical.

🔄How Net Metering Works — Understanding the Backward-Running Meter

Net metering is the game-changer that makes rooftop solar economical. Your DISCOM installs a bidirectional meter that measures both: (1) Electricity consumed from grid (running forward), (2) Excess electricity exported to grid (running backward).

During day when sun is bright: Your 3 kW system generates 12+ units per hour. If you consume 2 units, excess 10 units flows back to grid.

Your meter runs BACKWARD. Credit: +10 units.

During night or cloudy days: You consume from grid normally. Meter runs forward. Debit: consumption units.

Monthly settlement: DISCOM credits you for excess generation at the same rate they charge (₹8-12 per unit, varies by state). Some states credit at ₹0 per unit if there's excess (less generous).

Check your state's net metering policy.

Benefits: (1) Zero batteries needed — grid acts as free battery storage, (2) Excess never wasted, (3) Seasonal variation smoothed out — good solar months offset bad months, (4) True cost per unit = (total annual consumption - solar generation) / 12, often ₹0-3 per unit vs. ₹8-12 without solar.

☀️What is PM Surya Ghar Muft Bijli Yojana?

PM Surya Ghar Muft Bijli Yojana was launched in February 2024 with the target of installing rooftop solar panels on 1 crore households across India. The scheme provides central government subsidy on rooftop solar installation, enabling households to generate their own electricity, reduce monthly bills to near-zero, and sell surplus power back to the grid for income.

The scheme's tagline is 'Muft Bijli' (free electricity) because a well-sized rooftop solar system generates enough electricity to cover an average household's consumption. A 3 kW system generates 12-15 units of electricity per day — sufficient for a family using AC, refrigerator, washing machine, and other standard appliances.

After the initial subsidized investment, electricity is effectively free for 25 years.

As of 2026, over 1.3 crore households have registered on the PM Surya Ghar portal, with approximately 20 lakh installations completed. The scheme has been particularly popular in states with high electricity tariffs — Gujarat, Maharashtra, Rajasthan, and Tamil Nadu lead in registrations.

💰Subsidy structure — how much you save

The central government provides direct subsidy based on system capacity. For systems up to 2 kW: Rs 30,000 per kW (total Rs 60,000 for 2 kW).

For the additional capacity from 2-3 kW: Rs 18,000 per kW (additional Rs 18,000 for the 3rd kW). Maximum subsidy for 3 kW system: Rs 78,000.

Systems above 3 kW get no additional subsidy — the subsidy caps at Rs 78,000 regardless of capacity.

Real cost after subsidy: A 3 kW rooftop solar system costs approximately Rs 1.8-2.2 lakh (including panels, inverter, mounting structure, wiring, and installation). After Rs 78,000 subsidy, your out-of-pocket cost is Rs 1.0-1.4 lakh.

With a bank loan at 7% for 5 years, your EMI is approximately Rs 2,000-2,800/month — comparable to your current electricity bill.

The payback math: A 3 kW system saves Rs 1,500-2,500/month in electricity bills (depending on your state's tariff). After loan repayment (5 years), your electricity becomes completely free for the remaining 20 years of panel life.

Total savings over 25 years: Rs 4.5-7.5 lakh on a Rs 1-1.4 lakh investment. ROI: 300-500%.

Some states provide additional state subsidy on top of the central subsidy. Gujarat offers an additional Rs 10,000-20,000.

Maharashtra and Rajasthan offer state-level incentives through their renewable energy agencies. Check your state's renewable energy development agency website for additional benefits.

📝How to apply — step by step

Step 1: Register at pmsuryaghar.gov.in. Enter your electricity consumer number, DISCOM name, mobile number, and email.

The portal verifies your electricity connection and confirms you're a residential consumer. Only residential connections are eligible — commercial and industrial connections are excluded.

Step 2: After registration approval (3-7 days), the portal assigns an empanelled solar vendor from your area. You can also choose from the list of MNRE-approved vendors.

The vendor visits your home for a site survey — checking roof area, direction, shade analysis, and electrical infrastructure. The vendor recommends the optimal system size based on your roof and consumption.

Step 3: The vendor provides a quotation. Review the system specifications — panel brand (prefer Tier-1 manufacturers like Tata, Adani, Vikram Solar, Waaree), inverter type (string inverter vs micro-inverter), mounting structure material (galvanized iron or aluminum), and warranty terms (minimum 25 years on panels, 5 years on inverter).

Compare with 2-3 vendors before finalizing.

Step 4: After installation and commissioning, the vendor uploads commissioning report and photos on the PM Surya Ghar portal. Your DISCOM installs a net meter (bidirectional meter that measures both consumption and export). The portal verifies the installation through DISCOM confirmation.

Step 5: Subsidy is credited directly to your bank account within 30 days of commissioning verification. The subsidy is a one-time payment — not a loan. You receive the full Rs 78,000 (for 3 kW) directly in your Aadhaar-linked bank account.

⚡Net metering — how selling surplus power works

Your rooftop solar system generates maximum power during peak sunlight hours (10 AM-3 PM). If your household consumption during these hours is less than generation, the surplus power flows back to the grid through the net meter.

Your DISCOM credits this exported power against your consumption — effectively running your meter backwards.

At the end of the billing cycle, if you exported more than you consumed, the DISCOM either carries forward the credit to the next cycle or pays you for the surplus at the feed-in tariff rate (Rs 2-3/unit in most states). This means your electricity bill can actually become negative — the DISCOM pays YOU.

Net metering example: Your 3 kW system generates 400 units/month. Your household consumes 300 units/month.

Net export: 100 units. At Rs 5/unit tariff, your normal bill would be Rs 1,500.

With solar: consumed 300 units but generated 400, so net consumption is -100 units (exported). Bill: Rs 0 + credit of 100 units for next month.

Important: Net metering regulations vary by state. Some states allow full net metering (1:1 adjustment at retail tariff).

Others allow gross metering (you're paid separately for export at a lower rate). Check your DISCOM's net metering policy before installation.

States like Gujarat, Maharashtra, and Rajasthan have favorable net metering policies.

📊Choosing the right system size for your home

1 kW system (4 panels, 10 sq ft each = 40 sq ft roof area): Generates 4-5 units/day. Sufficient for homes using only fans, lights, TV, and charging devices.

Monthly generation: 120-150 units. Best for households with monthly consumption below 150 units.

Cost after subsidy: Rs 30,000-40,000. Saves Rs 600-1,000/month.

2 kW system (8 panels = 80 sq ft): Generates 8-10 units/day. Sufficient for homes with 1 AC (used 6-8 hours), refrigerator, washing machine, lights, and fans.

Monthly generation: 240-300 units. Best for households with 200-300 units monthly consumption.

Cost after subsidy: Rs 60,000-80,000. Saves Rs 1,200-2,000/month.

3 kW system (12 panels = 120 sq ft): Generates 12-15 units/day. Sufficient for homes with 2 ACs, refrigerator, geyser, washing machine, microwave, and all standard appliances.

Monthly generation: 360-450 units. Best for households with 300-450 units monthly consumption.

Cost after subsidy: Rs 1,00,000-1,40,000. Saves Rs 1,800-3,000/month.

Oversizing strategy: Install slightly larger than your current consumption. If you use 250 units/month now, install 3 kW (generates 360-450 units).

The surplus earns credits. As your consumption grows over time (new appliances, EV charging), you'll use those credits.

Solar panels last 25 years — plan for your future consumption, not just current.

🔧Maintenance and lifespan

Solar panels require minimal maintenance — clean with water every 2-4 weeks to remove dust. In dusty areas, monthly cleaning is essential as dust can reduce output by 15-25%.

Never use detergents or abrasive materials. Best time to clean: early morning when panels are cool.

Many vendors offer annual maintenance contracts for Rs 2,000-5,000/year covering cleaning, inspection, and minor repairs.

Panel lifespan: 25-30 years with gradual efficiency decline (0.5-0.7% per year). After 25 years, panels still generate 80-85% of original capacity.

Inverter lifespan: 10-15 years — budget for one inverter replacement (Rs 15,000-30,000) during the system's life. Mounting structure: 25-30 years if galvanized iron, 30+ years if aluminum.

Warranty structure: Panels come with 25-year performance warranty (minimum 80% output at year 25) and 10-12 year product warranty (covering manufacturing defects). Inverter: 5-10 year warranty depending on brand.

Mounting structure: 10 year warranty. Get all warranty documents in writing from the vendor — you'll need them for any future claims.

Insurance: Rooftop solar systems can be insured under home insurance policies for Rs 500-1,500/year covering theft, fire, storm damage, and lightning strikes. In cyclone-prone coastal areas and hailstorm-prone regions, insurance is strongly recommended.

Check with your existing home insurance provider for a solar add-on rider.

❓Common concerns addressed

Does solar work in monsoon and cloudy weather? Yes — at reduced capacity.

On cloudy days, panels generate 30-50% of peak output. During heavy rain, output drops to 10-20%.

However, monsoon months (June-September) coincide with lower AC usage, so the reduced generation roughly matches reduced consumption. Annual output variation is factored into the payback calculation.

Will solar panels damage my roof? No — panels are mounted on a raised structure (6-8 inches above the roof) that actually protects the roof from direct sun and rain.

The mounting structure is bolted to the roof parapet or attached using non-penetrating ballast mounts. If your roof has waterproofing issues, fix them before solar installation — the vendor can advise.

What happens during power cuts? Standard grid-tied solar systems (which PM Surya Ghar subsidizes) do NOT work during power cuts — they automatically shut off for safety (anti-islanding protection).

This prevents your solar power from flowing into the grid and endangering linemen working on repairs. If you want power during outages, you need a solar + battery hybrid system — but batteries add Rs 50,000-1,50,000 to the cost and are NOT subsidized under PM Surya Ghar.

Can I install solar on a rented house? Technically yes, but the subsidy goes to the electricity consumer number holder (usually the property owner).

As a tenant, you'd need the owner's permission and cooperation for the application. The owner benefits from property value appreciation.

A practical arrangement: the owner applies, the tenant pays the out-of-pocket cost, and both benefit from reduced electricity bills.

Apply now — subsidy may reduce over time

Beware of fraudulent vendors

A 3 kW rooftop solar system costs Rs 1-1.4 lakh after Rs 78,000 government subsidy. It generates free electricity worth Rs 1,500-2,500/month for 25 years. Total lifetime savings: Rs 4.5-7.5 lakh. Your rooftop becomes a money-making asset that pays for itself in 3-4 years and earns pure profit for the next 21 years.

📊State-wise electricity tariff and solar savings

Your solar savings depend directly on your state's electricity tariff — higher tariffs mean higher savings. Maharashtra: Rs 8-12/unit for residential (above 300 units/month) — a 3 kW solar saves Rs 2,500-3,500/month.

Gujarat: Rs 5-7/unit — saves Rs 1,500-2,500. Rajasthan: Rs 6-8/unit — saves Rs 1,800-2,800.

Delhi: Rs 5-8/unit — saves Rs 1,500-2,500. Tamil Nadu: Rs 4-6/unit — saves Rs 1,200-2,000.

States with progressive tariff slabs benefit most from solar. In Maharashtra, if your consumption drops from 400 units to 100 units (net after solar), your per-unit rate drops from Rs 12 to Rs 4.

You save not just on units but also on the slab rate reduction. This 'slab benefit' can add 20-30% to your savings beyond the direct generation value.

States with flat or low agricultural tariffs (UP, Bihar, MP) show lower financial returns from residential solar because electricity is already cheap. However, these states also have frequent power cuts — a solar + battery system provides reliable power that the grid doesn't, adding value beyond just financial savings.

Commercial viability by region: Western and Southern India (300+ sunny days, high tariffs) — excellent ROI, payback in 3-4 years. Northern India (250-280 sunny days, moderate tariffs) — good ROI, payback in 4-5 years.

Eastern and Northeastern India (200-250 sunny days, lower tariffs) — moderate ROI, payback in 5-7 years. Even in the lowest-return regions, solar is financially positive over its 25-year life.

🏦Solar financing options

Bank loans for rooftop solar: SBI, PNB, Bank of Baroda, Canara Bank, and most PSBs offer dedicated solar home loans at 7-9% interest for 5-7 years. Loan amount covers the post-subsidy cost (Rs 1-1.4 lakh for 3 kW).

EMI: Rs 2,000-2,800/month for 5 years. Since your electricity savings are Rs 1,500-2,500/month, the net cost during loan period is just Rs 300-1,000/month — and after the loan ends, electricity is completely free.

DISCOM financing: Some DISCOMs offer on-bill financing — the solar installation cost is added to your monthly electricity bill as EMI over 3-5 years. This is the simplest financing option since it requires no separate bank loan application.

Check with your DISCOM if this option is available in your area.

Solar vendor financing: Some empanelled vendors offer EMI plans through NBFC partners. Read the terms carefully — interest rates from vendors (12-18%) are typically higher than bank loans (7-9%).

Always compare vendor financing with bank loan rates before committing. Banks are almost always cheaper for solar financing.

Zero-cost solar models (RESCO): Some companies install solar on your roof at zero upfront cost and sell you the electricity at a discounted rate (Rs 3-4/unit vs Rs 6-10/unit grid tariff). They own the system and maintain it.

After 15-20 years, ownership transfers to you. This model suits people who can't afford any upfront payment but want solar savings.

However, the PM Surya Ghar subsidy is NOT available under RESCO model — the subsidy goes to the system owner (the company, not you).

🌍Environmental impact of your rooftop solar

A 3 kW rooftop solar system prevents approximately 4 tonnes of CO2 emissions per year by displacing coal-fired grid electricity. Over 25 years, that's 100 tonnes of CO2 — equivalent to planting 4,500 trees or taking 2 cars off the road permanently.

Every household that goes solar makes a measurable contribution to India's climate commitments.

India has pledged to achieve 500 GW of renewable energy capacity by 2030 under the Paris Agreement. Rooftop solar is a critical component — the target is 100 GW from rooftop alone.

PM Surya Ghar's 1 crore household target, if achieved, adds approximately 30 GW of distributed solar capacity. By installing rooftop solar, you're directly contributing to India's international climate commitments.

Beyond carbon, rooftop solar reduces transmission and distribution losses. Grid electricity loses 20-25% during transmission from power plant to your home.

Rooftop solar generates electricity where it's consumed — zero transmission loss. Every unit generated on your roof displaces 1.25 units at the power plant level, making rooftop solar 25% more efficient than grid electricity in terms of primary energy use.