Ultimate Guide: How Much Does Rooftop Solar Cost After GST &

Rooftop solar is becoming a household staple across India, but many homeowners still ask, how much does rooftop solar cost once GST and government subsidies are factored in. The answer depends on three things: the raw price of the solar system, the 5 % GST that applies to solar equipment, and the central cash‑in‑hand subsidy under the PM Surya Ghar Muft Bijli Yojana. This guide walks you through each component, shows you how to calculate the net amount you will actually pay, and highlights the steps you must follow to claim the subsidy. By the end, you’ll be able to prepare a realistic budget for a 2 kW to 3 kW residential rooftop system – the most common sizes for Indian homes.

The market for rooftop solar in 2026 remains vibrant. Installers use specialised software to generate subsidy‑aware proposals, track lead conversations on WhatsApp, and manage the entire installation workflow without spreadsheets. Platforms such as SolarSwytch (the operating system for solar installers) make the process smoother for both installers and homeowners, ensuring that the subsidy and GST calculations are accurate from day one. While SolarSwytch does not sell panels or inverters, its tools help you receive a clear, item‑by‑item quote that reflects the latest government benefits.

Understanding how much does rooftop solar cost also means knowing the financial upside. A typical Indian household can save up to 300 kWh of electricity per month – roughly the amount covered by the free‑electricity target of the PM Surya Ghar Muft Bijli Yojana. Those savings, combined with the cash subsidy, often mean the pay‑back period is well under five years. Moreover, the system continues to generate clean power for 25 years or more, turning your roof into a long‑term income source.

In the sections that follow, we break down the subsidy structure, walk you through the application process, show you how to compute the post‑GST price, and explain the compliance steps you must complete before the subsidy is released to your bank account. Whether you are a first‑time buyer or looking to upgrade an existing installation, this guide gives you the numbers, the steps, and the confidence to move forward.

Quick Answer: After applying GST and the PM Surya Ghar Muft Bijli Yojana subsidy, a 2 kW residential rooftop system typically costs around 40 %–50 % of its pre‑subsidy price, with the exact out‑of‑pocket amount varying by system size and installer quote.

Key Facts

• The PM Surya Ghar Muft Bijli Yojana provides ₹30,000 per kW for the first 2 kW of a residential system. pmsuryaghar.gov.in
• An additional ₹18,000 per kW is available for capacity between 2 kW and 3 kW, with the total central subsidy capped at ₹78,000 for systems of 3 kW and above. pmsuryaghar.gov.in
• The scheme aims to supply up to 300 kWh of free electricity per month to 1 crore households. PIB, Feb 2024
• Applications must be submitted online through pmsuryaghar.gov.in, followed by DISCOM verification and net‑metering agreement. pmsuryaghar.gov.in
• The subsidy is only for residential grid‑connected rooftop systems; commercial installations are not eligible. pmsuryaghar.gov.in

Table of Contents

• How Much Does Rooftop Solar Cost – Why This Matters
• Common Misconceptions
• How Much Does Rooftop Solar Cost — How It Works & What You Must Know
• Costs, Savings and Returns — What the Numbers Mean for You
• How Much Does Rooftop Solar Cost – Use Cases and Scenarios
• How Much Does Rooftop Solar Cost – Step‑by‑Step Roadmap
• Illustrative Example
• How Much Does Rooftop Solar Cost – Alternatives and Comparison
• Rules, Compliance and Regulations — Staying Within the Law
• Frequently Asked Questions
• Conclusion

How Much Does Rooftop Solar Cost – Why This Matters

India’s electricity bills are rising faster than most households can absorb. In 2025 the average monthly residential bill crossed ₹2,500, and many families in tier‑2 and tier‑3 cities see even higher charges because of poor distribution losses. At the same time, the country’s solar capacity has crossed 100 GW, yet only about 15 % of Indian homes have a rooftop system. The gap between the growing demand for cheap, clean power and the low adoption of rooftop solar creates a huge opportunity for homeowners.

The financial picture before subsidy

A typical 1 kW grid‑connected rooftop system in 2026 costs about ₹85,000 (including panels, inverter, mounting, and installation). The price per watt has come down to roughly ₹85/W thanks to local manufacturing and economies of scale. However, most buyers still face an upfront cash outflow that feels large compared with a monthly electricity bill.

System Size	Pre‑subsidy Cost (₹)	GST @ 18 % (₹)	Total Cost before Subsidy (₹)
1 kW	85,000	15,300	1,00,300
2 kW	1,68,000	30,240	1,98,240
3 kW	2,55,000	45,900	3,00,900
5 kW	4,20,000	75,600	4,95,600

All figures are rounded and include GST but not any state‑level top‑up.

Even after GST, the out‑of‑pocket amount appears steep for a family whose total electricity expense is less than ₹2,500 per month. This is why the central government introduced the PM Surya Ghar Muft Bijli Yojana – a subsidy that directly reduces the amount you pay at the time of purchase.

How the central subsidy changes the cost

The scheme offers a flat ₹30,000 per kW for the first 2 kW and an additional ₹18,000 per kW for the third kilowatt. The total central subsidy is capped at ₹78,000 for any system of 3 kW or larger. Below is a quick look at the net cost after applying the subsidy and GST.

System Size	Pre‑subsidy Cost (₹)	GST (₹)	Central Subsidy (₹)	Net Cost (₹)
1 kW	85,000	15,300	30,000	70,300
2 kW	1,68,000	30,240	60,000	1,38,240
3 kW	2,55,000	45,900	78,000	2,22,900
5 kW	4,20,000	75,600	78,000	4,17,600

The subsidy can cut the upfront spend by 30 % to 40 %, making rooftop solar much more affordable for the average Indian home. When you combine this reduction with the savings on electricity bills – typically ₹8‑12 per kWh saved – the pay‑back period falls to 3‑5 years for most residential installations.

Why the timing is critical in 2026

• GST remains at 18 % on solar hardware, so the subsidy’s impact on the final bill is unchanged from previous years.
• State‑level top‑ups vary and can add another ₹5,000‑₹20,000 per kW depending on the DISCOM. The exact amount is published on each state’s electricity board portal; homeowners should check their local DISCOM site for the latest figures.
• Net‑metering rules have been standardised across most states, allowing excess generation to be exported at the same tariff as consumption, further improving returns.
• Application process is now fully online via pmsuryaghar.gov.in, with DISCOM verification taking an average of 7‑10 days. Once approved, the subsidy is credited directly to the applicant’s bank account, usually within 15‑20 days after the final inspection.

The broader impact on the grid

When more households install rooftop solar, the load on the central grid eases, especially during peak afternoon hours. This helps reduce transmission losses and can lower overall system costs for utilities, which may eventually translate into lower tariffs for all consumers. Moreover, the scheme’s target of 1 crore households receiving up to 300 units of free electricity per month can shave a sizable chunk off the nation’s aggregate demand, supporting India’s climate commitments.

Visual guide

The image above summarises the cost flow: hardware price → GST → central subsidy → net cost → savings via net‑metering. It is a handy reference for anyone trying to answer the question “how much does rooftop solar cost after GST and subsidy?” and can be shared with family members who are not comfortable with numbers.

Bottom line for homeowners

• The pre‑subsidy price of a 1 kW system is around ₹85,000 plus GST.
• The central subsidy reduces this to roughly ₹70,300 for a 1 kW system.
• State top‑ups can lower the cost further; always verify with your local DISCOM.
• With an average monthly saving of ₹800‑₹1,200, most families recover the investment in 3‑5 years.
• After the pay‑back period, the system essentially provides free electricity for its 25‑year lifespan, aligning with the promise of the PM Surya Ghar Muft Bijli Yojana.

Understanding these numbers helps Indian homeowners make an informed decision and take advantage of one of the most generous solar subsidy programmes in the world. The next sections will clear up common myths and show real‑world scenarios where rooftop solar makes sense.

Common Misconceptions

Myth 1 – “Solar panels are too expensive for a middle‑class family”

Reality: The upfront cost is indeed higher than a single electricity bill, but after applying the PM Surya Ghar Muft Bijli Yojana subsidy and GST, the net price drops by up to 40 %. For a 2 kW system, the net cost is roughly ₹1.38 lakh, which can be financed over 5‑7 years at modest interest rates. Monthly EMIs often become lower than the current electricity bill, turning the system into a cash‑flow positive asset from day one.

Myth 2 – “The subsidy is only for the wealthy or large houses”

Reality: The scheme is explicitly designed for residential rooftop systems, with a cap of ₹78,000 for any system of 3 kW or more. It targets 1 crore households across income brackets. Eligibility only requires a valid electricity connection, roof ownership, and that the applicant has not received any prior solar subsidy. This makes the benefit accessible to typical middle‑income families.

Myth 3 – “I will not get any benefit if I don’t have a net‑metering agreement”

Reality: Net‑metering is a prerequisite for the subsidy, but once the agreement is signed with your local DISCOM, excess power generated is credited at the same rate as consumption. This effectively doubles the value of the electricity you produce, shortening the pay‑back period. The agreement is part of the standard installation process and does not add extra cost.

Myth 4 – “State‑level subsidies are negligible and not worth checking”

Reality: While the central subsidy is the major component, many states offer additional top‑ups ranging from ₹5,000 to ₹20,000 per kW. These amounts can shave an extra 10‑25 % off the net cost. Ignoring state incentives may lead to paying more than necessary. Homeowners should visit their state DISCOM or the official portal pmsuryaghar.gov.in to confirm any extra benefits.

Myth 5 – “Solar panels need a lot of maintenance and will break down quickly”

Reality: Modern crystalline silicon panels have a 25‑year performance warranty and lose less than 0.5 % efficiency per year. Inverters typically carry a 5‑10 year warranty and are replaceable at a known cost. Routine cleaning twice a year is sufficient in most Indian climates. The low maintenance cost is factored into the overall savings calculation, keeping the system’s ROI robust.

Myth 6 – “I can’t install solar because my roof is too small or shaded”

Reality: Even a modest roof can accommodate a 1‑2 kW system, which is enough to offset a significant portion of a typical household’s consumption (about 150‑250 kWh per month). For shaded roofs, installers can use tilted mounting structures or selective placement of panels to maximise sun exposure. An on‑site feasibility check, performed by a registered vendor after DISCOM approval, will confirm the viable capacity.

Myth 7 – “The application process is too bureaucratic”

Reality: The entire workflow is now digital. Register on pmsuryaghar.gov.in, upload required documents, and wait for DISCOM verification. Most applicants receive approval within 10 days. After installation, a single inspection triggers the subsidy credit to the applicant’s bank account. The process has been streamlined to encourage mass adoption.

Myth 8 – “Solar is only for urban areas”

Reality: The subsidy is nationwide and applies to any residential rooftop with a grid connection, whether in a metro city, a small town, or a rural settlement. In fact, many tier‑2 and tier‑3 cities see higher solar penetration because of lower land costs and higher daylight hours. The scheme’s goal of reaching 1 crore households includes a substantial rural component.

By debunking these myths, homeowners can see that the question “how much does rooftop solar cost after GST and subsidy” is not just about price—it’s about a clear, government‑backed pathway to clean, affordable electricity for every Indian family.

How Much Does Rooftop Solar Cost — How It Works & What You Must Know

Understanding the true cost of rooftop solar involves several layers: the base equipment price, GST, the central cash subsidy, any state‑level top‑ups, and the net‑metering arrangement. Below we unpack each piece, provide a step‑by‑step workflow, and illustrate the calculations with a simple table.

1. Base Equipment Price (Pre‑GST, Pre‑Subsidy)

Solar installers quote a price per kilowatt (kW) that covers panels, inverters, mounting structures, wiring, and installation labour. Prices vary by brand, quality, and location, but most residential quotes in 2026 fall between ₹70,000 and ₹90,000 per kW. These figures are market averages and are not government‑mandated.

2. GST on Solar Equipment

The Goods and Services Tax (GST) on solar hardware is 5 %. GST is calculated on the total invoice amount before any subsidy is applied.

Formula: GST Amount = Base Price × 5 %

3. Central Cash Subsidy – PM Surya Ghar Muft Bijli Yojana

The central subsidy is a cash credit that reduces the homeowner’s out‑of‑pocket expense after the invoice (including GST) is generated.

System Size	Central Subsidy (₹)	Calculation Details
1 kW – 2 kW	₹30,000 per kW	e.g., 2 kW × ₹30,000 = ₹60,000
>2 kW – 3 kW	₹30,000 per kW for first 2 kW + ₹18,000 for each additional kW	e.g., 3 kW = (2 kW × ₹30,000) + (1 kW × ₹18,000) = ₹78,000
>3 kW	Capped at ₹78,000 total	No extra cash beyond the cap

These amounts are cash‑in‑hand, meaning they are transferred directly to the homeowner’s bank account after verification.

4. State‑Level Top‑Ups (Variable)

Many states offer additional subsidies or interest‑free loans. The amount and eligibility criteria differ widely. Homeowners should check their respective state DISCOM or the official portal for the latest details. Do not assume a specific figure; the guide only notes that “amounts vary by state.”

5. Net Metering Requirement

Before the subsidy is released, the homeowner must obtain a net‑metering agreement with the local DISCOM. Net metering allows excess solar generation to be fed back to the grid, offsetting electricity bills. The agreement is a prerequisite for both subsidy disbursement and the financial benefits of the system.

6. Step‑by‑Step Application Process

1. Register on the national portal pmsuryaghar.gov.in.
2. Enter roof details (size, orientation) and system capacity.
3. Upload documents – electricity bill, ownership proof, and identity proof.
4. DISCOM verification – the local distribution company checks feasibility and issues a net‑metering approval.
5. Select a registered installer – the installer must be approved under the scheme.
6. Installation – the vendor completes the fit‑out, connects to the grid, and arranges inspection.
7. Inspection & Certification – a designated officer verifies compliance.
8. Subsidy credit – after successful inspection, the cash subsidy is transferred to the homeowner’s bank account.

For the official portal and detailed guidelines, visit the PM Surya Ghar Muft Bijli Yojana website at pmsuryaghar.gov.in.

7. Sample Cost Calculation (Illustrative)

Assume a 2 kW system with a base price of ₹80,000 per kW.

Item	Calculation	Amount (₹)
Base Price	2 kW × ₹80,000	1,60,000
GST (5 %)	1,60,000 × 0.05	8,000
Invoice Total	Base + GST	1,68,000
Central Subsidy	2 kW × ₹30,000	60,000
Out‑of‑Pocket	Invoice – Subsidy	1,08,000

If the homeowner’s state offers an additional ₹10,000 top‑up, the final out‑of‑pocket amount would drop to ₹98,000.

8. Tools That Simplify the Process

Solar installers increasingly rely on specialised software to generate subsidy‑aware proposals, manage leads over WhatsApp, and track installations end‑to‑end. Platforms such as SolarSwytch provide a single operating system that handles CRM, quotation generation, GST and subsidy calculations, and operational workflow – eliminating manual spreadsheets and reducing errors.

Costs, Savings and Returns — What the Numbers Mean for You

When evaluating a rooftop solar purchase, the key question is not just the headline price but the net cost after subsidies, the annual electricity savings, and the overall return on investment (ROI). Below we explore each component using the ground‑truth subsidy figures and typical market ranges for equipment cost.

1. Price Ranges (Pre‑Subsidy)

• Low‑end systems: ₹70,000 per kW
• Mid‑range systems: ₹80,000 per kW
• High‑end systems: ₹90,000 per kW

These ranges reflect variations in panel efficiency, inverter brand, and installation complexity. GST of 5 % is added on top of the quoted price.

2. Effective Out‑of‑Pocket Cost After Subsidy

Using the subsidy caps, the cash benefit reduces the payable amount dramatically, especially for systems up to 3 kW.

System Size	Base Price Range (₹)	GST (5 %)	Central Subsidy (₹)	Net Payable Range (₹)
2 kW	1,40,000 – 1,80,000	7,000 – 9,000	60,000	87,000 – 1,29,000
3 kW	2,10,000 – 2,70,000	10,500 – 13,500	78,000	1,42,500 – 1,85,500

The net payable amount is the invoice total (base + GST) minus the central subsidy. State top‑ups, if any, would further lower the figure.

3. Annual Electricity Savings

A typical Indian household consumes about 3,600 kWh per year (≈300 kWh per month). A 2 kW rooftop system can generate roughly 2,400 kWh annually in most Indian latitudes, covering ≈66 % of the household’s consumption.

• Average tariff (2026): ₹8 per kWh (varies by state)
• Annual saving: 2,400 kWh × ₹8 = ₹19,200

For a 3 kW system, generation rises to ≈3,600 kWh, potentially offsetting the entire annual bill.

4. Pay‑Back Period

System Size	Net Payable (₹)	Annual Savings (₹)	Approx. Pay‑Back (Years)
2 kW	87,000 – 1,29,000	19,200	4.5 – 6.7
3 kW	1,42,500 – 1,85,500	28,800	5.0 – 6.5

These figures assume constant electricity tariffs and no degradation. Real‑world pay‑back may be shorter if tariffs rise or if the homeowner benefits from additional state incentives.

5. Long‑Term Returns

Solar panels typically guarantee 80 % output after 25 years. Assuming the same annual consumption pattern, a 2 kW system could continue to save ≈₹15,000 per year after the pay‑back period, delivering a total lifetime saving of ₹3–4 lakhs beyond the initial investment.

6. Financing Options

Many installers partner with banks to offer interest‑free loans that are repaid through the monthly electricity bill. Because the net‑metering credit reduces the bill, the loan repayment aligns with the cash flow generated by the system. Homeowners should check with their local DISCOM or state agency for any such schemes.

7. Visual Summary

The diagram illustrates the flow from base price → GST → subsidy → net payable → savings → ROI.

In summary, the combination of a modest GST rate and a generous central cash subsidy means that the effective cost of rooftop solar in 2026 is often less than half of the pre‑subsidy price. When paired with substantial electricity savings, the investment becomes financially attractive for most Indian homeowners.

How Much Does Rooftop Solar Cost – Use Cases and Scenarios

1. The Urban Apartment Owner (2 kW system)

Rita lives in a 2‑BHK flat in Bangalore with a balcony that receives sun for about 5‑6 hours a day. She wants to cut her monthly bill, which is around ₹2,200. A 2 kW rooftop system fits her roof size and can generate roughly 250 kWh per month.

• Pre‑subsidy cost: ₹1,68,000 + GST ₹30,240 = ₹1,98,240
• Central subsidy: ₹60,000 (₹30,000 per kW for 2 kW)
• Net cost: ₹1,38,240 (plus any state top‑up)

If she finances the net amount over 6 years at 9 % interest, her EMI is about ₹2,300 – slightly higher than her current bill, but the system immediately starts generating electricity, reducing the net outflow to roughly ₹1,200 after the first month’s generation is accounted for. Within 4 years she recovers the investment and then enjoys near‑free power.

Rita can use the Cost of a 1kW Solar System in India 2026 (After Subsidy) article to compare per‑kilowatt costs and decide if a larger system is worthwhile later.

2. The Small Town Business (5 kW system)

Arun runs a tea stall in Coimbatore with a 24‑hour power requirement. His average monthly consumption is 600 kWh, and he pays about ₹7,500 per month. A 5 kW rooftop installation can generate ≈ 650 kWh per month, covering his entire load and exporting excess power.

• Pre‑subsidy cost: ₹4,20,000 + GST ₹75,600 = ₹4,95,600
• Central subsidy: ₹78,000 (capped)
• Net cost: ₹4,17,600 (state top‑ups may reduce this further)

Arun finances the net amount over 7 years; his EMI works out to ₹6,200, which is lower than his current electricity expense. After the first year, the surplus electricity exported through net‑metering brings in a small credit, further improving cash flow. By the end of the 5‑year pay‑back, the stall operates on virtually free electricity.

For a deeper look at local costs, Arun checks the Solar in Coimbatore 2026: Cost, Subsidy, Installers & Savings guide.

3. The Jaipur Homeowner (3 kW system)

Sneha from Jaipur wants to install solar to offset her winter heating load. Her roof can accommodate a 3 kW system, which will generate about 350 kWh per month.

• Pre‑subsidy cost: ₹2,55,000 + GST ₹45,900 = ₹3,00,900
• Central subsidy: ₹78,000 (maximum)
• Net cost: ₹2,22,900 (plus any state addition)

Sneha’s monthly electricity bill is ₹3,000. With the solar system, she saves roughly ₹2,400 each month. Financing the net cost over 5 years gives an EMI of ₹4,800, but the immediate electricity savings more than cover the EMI, leaving her with a net positive cash flow from month one. After the subsidy credit, she enjoys a 7‑year effective pay‑back.

She refers to the Cost of Solar Panels in Jaipur 2026 (After Subsidy) article for a city‑specific price breakdown.

4. The Rural Farmer (1 kW system)

Ramesh, a farmer in Madhya Pradesh, has a small shed with a roof that gets 6 hours of sun daily. He needs power for a water pump that runs 2 hours a day, consuming about 30 kWh per month. A 1 kW system can easily meet this need and also power a few LED lights.

• Pre‑subsidy cost: ₹85,000 + GST ₹15,300 = ₹1,00,300
• Central subsidy: ₹30,000
• Net cost: ₹70,300 (state top‑up may lower further)

Ramesh can obtain a micro‑loan from the local bank at 8 % interest, resulting in an EMI of ₹1,600. His electricity expense for the pump was previously ₹1,200 per month. The solar system eliminates that cost and provides a surplus that can be sold back to the grid, giving him a small additional income. The pay‑back period is roughly 4 years, after which the system supplies free power for the rest of its life.

5. The Multi‑Family Housing Society (10 kW shared system)

A housing society of 20 flats in Pune decides to install a shared 10 kW rooftop system on the common terrace. The total cost before subsidy is about ₹8,50,000 plus GST ₹1,53,000 = ₹10,03,000. The central subsidy caps at ₹78,000, bringing the net cost to ₹9,25,000. The society splits the cost equally, so each flat contributes ₹46,250 initially.

Each flat receives an allocation of 0.5 kW, generating roughly 75 kWh per month per flat. With an average monthly bill of ₹2,500, each household saves about ₹900 after accounting for the shared system’s output. The collective investment pays back in 5‑6 years, after which the society enjoys reduced electricity charges for all members.

6. The Eco‑Conscious Retiree (2 kW with battery)

Mohan, a retired teacher in Hyderabad, wants a reliable backup during frequent power cuts. He opts for a 2 kW system paired with a modest battery (not part of the subsidy). The solar portion follows the same cost structure as any 2 kW residential system, while the battery adds an extra ₹45,000 (no subsidy).

• Solar net cost after subsidy: ₹1,38,240
• Battery cost: ₹45,000
• Total outlay: ₹1,83,240

Mohan finances the total over 8 years; his EMI is roughly ₹2,800. His monthly electricity bill is ₹2,600, but the solar generation offsets most of it, leaving a small net outflow. The battery ensures power during outages, adding value beyond pure cost savings. Over a 25‑year lifespan, the combined system provides both financial and reliability benefits.

7. The High‑Rise Apartment Complex (15 kW shared)

A 30‑storey apartment building in Delhi installs a 15 kW rooftop system on its roof garden. The pre‑subsidy cost is about ₹12,75,000 plus GST ₹2,29,500 = ₹15,04,500. After the central subsidy of ₹78,000, the net cost is ₹14,26,500. The building’s management divides the cost among all 120 units, resulting in an initial contribution of ₹11,887 per flat.

Each flat receives a 0.125 kW allocation, generating roughly 20 kWh per month. With an average monthly bill of ₹2,800, each household saves about ₹300. The collective pay‑back period is about 7 years, after which the residents enjoy a permanent reduction in electricity expenses.

---

How to Get Started

1. Check eligibility – You must have a valid electricity connection, own the roof, and not have received any prior solar subsidy.
2. Visit the official portal – Register at pmsuryaghar.gov.in and upload the required documents.
3. Get DISCOM approval – The portal will guide you through the feasibility check and net‑metering agreement.
4. Choose a registered installer – Use a vendor that integrates with the subsidy calculator to generate a GST‑aware proposal.
5. Install and inspect – After installation, a DISCOM inspector verifies the system.
6. Receive subsidy – The approved amount is credited directly to your bank account.

While SolarSwytch does not sell hardware, its all‑in‑one operating system helps installers generate accurate, subsidy‑aware proposals, manage leads over WhatsApp, and track installations from start to finish, simplifying the process for both the installer and the homeowner.

By understanding the real cost after GST and the PM Surya Ghar Muft Bijli Yojana subsidy, Indian homeowners can make confident decisions, reduce electricity bills, and contribute to a cleaner grid.

How Much Does Rooftop Solar Cost – Step‑by‑Step Roadmap

Installing a rooftop solar system in 2026 can feel like navigating a maze of numbers, paperwork, and technical choices. This roadmap breaks the process into clear, numbered steps so you can see exactly how the final bill is formed and where the PM Surya Ghar Muft Bijli Yojana subsidy fits in.

1. Assess Your Roof and Energy Need Measure the usable roof area. A typical Indian home can host 1 kW of solar panels on about 8–10 sq m of unobstructed space. Use a simple calculator or ask a local installer to confirm how many kilowatts (kW) you can safely install. Calculate your monthly consumption. Look at your electricity bills for the last 12 months and note the average kWh used. Most households in the 2‑3 kW range see a 30‑40 % reduction in grid electricity after installation.

2. Choose System Size The central subsidy is tiered:

   • 0‑2 kW – Rs 30,000 per kW
   • 2‑3 kW – an extra Rs 18,000 per kW (total Rs 78,000 for a 3 kW system) For a 2.5 kW system, you receive Rs 30,000 × 2 + Rs 18,000 × 0.5 = Rs 69,000. Decide whether you want to stay at 2 kW (lower upfront cost) or push to 3 kW (higher subsidy ceiling).

3. Check Eligibility

   • Residential property with a valid electricity connection.
   • You own the roof or have written permission from the owner.
   • No previous solar subsidy has been claimed.
   • The system must be grid‑connected (no off‑grid or hybrid setups for this scheme).

4. Register on the Official Portal Go to pmsuryaghar.gov.in and create an account. You will need:

   • Aadhaar number,
   • Electricity bill (last 3 months),
   • Roof photographs,
   • Preferred DISCOM (distribution company). Fill in the online form, upload the documents, and submit.

5. DISCOM Feasibility Approval After registration, the DISCOM reviews your roof layout, shading analysis, and load profile. They may ask for a site visit. Once satisfied, they issue a Feasibility Approval Letter with a unique application number. This step is crucial because the net‑metering agreement and subsidy disbursement both depend on DISCOM sign‑off.

6. Select a Registered Solar Installer Choose an installer who is registered on the portal and can generate a GST‑aware proposal. Many installers now use platforms that automatically calculate the subsidy, GST, and total cost in one document. Look for installers who manage leads over WhatsApp and can track the installation end‑to‑end – this reduces paperwork and delays.

7. Obtain a Detailed Quote The installer will provide a proposal that includes:

   • Equipment cost (panels, inverter, mounting, wiring).
   • Installation labour.
   • GST (18 %) on the total equipment + labour.
   • Central subsidy amount (as per the tier you selected).
   • State‑top‑up (if any) – amounts vary by state; refer to your state DISCOM or the portal for details.

   Example (3 kW system):

   • Equipment + labour (pre‑GST): Rs 1,80,000
   • GST @18 %: Rs 32,400
   • Subtotal: Rs 2,12,400
   • Central subsidy: Rs 78,000
   • Net payable: Rs 1,34,400 (plus any state top‑up you may receive).

8. Sign the Net‑Metering Agreement Before installation, you must sign a net‑metering contract with your DISCOM. This agreement allows excess solar generation to be fed back to the grid and credited against your electricity bill. The installer usually helps coordinate this paperwork.

9. Installation and Commissioning The installer mounts the panels, connects the inverter, and completes wiring. After the physical work, a Commissioning Report is submitted to the DISCOM. The DISCOM then conducts a final inspection to verify compliance with safety standards and the approved design.

10. Inspection and Certification A DISCOM engineer visits the site, checks the installation, and signs off on the net‑metering meter. Once certified, the system is officially “live” and starts generating electricity for your home.

11. Subsidy Disbursement After the inspection report is uploaded to the portal, the central subsidy amount is credited directly to the bank account you provided during registration. The credit usually appears within a few weeks, but timelines can differ per state.

12. Monitor Savings and Performance Most modern inverters come with a mobile app that shows real‑time generation, consumption, and savings. Track your monthly bill to see the impact of the subsidy and the reduced grid draw. Over a 25‑year lifetime, a typical 3 kW system can save between Rs 3 lakh and Rs 4 lakh, depending on electricity rates.

13. Maintain the System Annual cleaning and a check‑up after the warranty period (usually 5 years for panels, 10 years for inverter) keep the system performing at peak efficiency. Some installers offer a maintenance contract; compare offers before signing.

Quick Reference Table

Step	What You Do	Who Helps You	Key Document
1	Measure roof, check load	Yourself	Roof sketch, electricity bills
2	Decide system size	Installer (quote)	Size recommendation
3	Verify eligibility	Yourself	Aadhaar, ownership proof
4	Register on pmsuryaghar.gov.in	Yourself	Online portal account
5	Get DISCOM approval	DISCOM	Feasibility Approval Letter
6	Choose installer	You	Installer registration on portal
7	Receive GST‑aware quote	Installer	Detailed proposal
8	Sign net‑metering contract	DISCOM & You	Net‑metering agreement
9	Install system	Installer	Installation checklist
10	Inspection	DISCOM	Inspection report
11	Receive subsidy	Government	Bank credit
12	Track performance	You (app)	Monthly generation report
13	Service & upkeep	Installer (optional)	Maintenance contract

Following these steps will give you a transparent view of how much does rooftop solar cost after accounting for GST and the central subsidy. For a deeper dive into the numbers for a 1 kW system, see our article on the Cost of a 1kW Solar System in India 2026 (After Subsidy).

---

If you live in Coimbatore, the local DISCOM’s top‑up rules are explained in Solar in Coimbatore 2026: Cost, Subsidy, Installers & Savings.

---

Ready to start? Register on pmsuryaghar.gov.in, get your feasibility letter, and let a certified installer handle the rest. The journey from roof to savings is now clearer than ever.

Illustrative Example

Below is a detailed, step‑by‑step illustration of how a typical Indian homeowner—let’s call her Anita from Jaipur—calculates the final out‑of‑pocket cost for a rooftop solar system in 2026. All figures use the central subsidy amounts from the PM Surya Ghar Muft Bijli Yojana and include GST, but they do not add any state‑specific top‑ups, as those vary.

1. Determining System Size

Anita’s monthly electricity usage averages 250 kWh. She wants to offset roughly 40 % of her bill, which translates to about 100 kWh per month. A good rule of thumb is that 1 kW of solar generates roughly 4 kWh per day in Jaipur’s climate, or 120 kWh per month.

• Chosen size: 2 kW (covers her target and fits her roof).

2. Gathering Cost Components

Item	Description	Cost (INR)
Solar panels (poly‑crystalline)	2 kW @ Rs 25,000 per kW	50,000
Inverter (string inverter, 2 kW)	1 unit @ Rs 15,000	15,000
Mounting structure & wiring	Fixed cost for 2 kW	20,000
Installation labour	Skilled crew, 2 days	15,000
Subtotal (pre‑GST)		Rs 1,00,000

3. Adding GST

GST on solar equipment and services is 18 %.

• GST = 18 % of Rs 1,00,000 = Rs 18,000

• Total after GST: Rs 1,18,000

4. Applying the Central Subsidy

Since Anita’s system is 2 kW, she qualifies for the first slab: Rs 30,000 per kW.

• Subsidy = 2 kW × Rs 30,000 = Rs 60,000

5. Calculating Net Payable

• Total after GST: Rs 1,18,000
• Minus central subsidy: Rs 60,000
• Net amount Anita pays: Rs 58,000

If her state offers an additional top‑up, the out‑of‑pocket cost would be lower, but we do not list any specific amount here.

6. Financing the Payment

Many installers provide a zero‑interest EMI option spread over 12 months. For Anita:

• Monthly EMI = Rs 58,000 ÷ 12 ≈ Rs 4,834

This is often comparable to her current monthly electricity bill, making the transition cash‑flow friendly.

7. Net‑Metering and Savings

After installation, Anita signs a net‑metering agreement with Jaipur Vidyut Vitran Nigam (JVVN). Her system generates ≈ 240 kWh per month (2 kW × 4 kWh × 30 days).

• Self‑consumed electricity: 100 kWh (reduces her bill).
• Exported to grid: 140 kWh (credited at the same tariff).

Assuming an average tariff of Rs 8 per kWh, her monthly savings are:

• Savings from self‑consumption: 100 kWh × Rs 8 = Rs 800

• Credit for export: 140 kWh × Rs 8 = Rs 1,120

• Total monthly benefit: Rs 1,920

At this rate, Anita recovers her net investment of Rs 58,000 in about 30 months (2.5 years). After that, the electricity is essentially free for the remaining life of the system.

8. Timeline Overview

Milestone	Approx. Time
Portal registration & document upload	1 week
DISCOM feasibility approval	2‑3 weeks
Installer quote & GST‑aware proposal	1 week
Net‑metering contract signing	1 week
Installation & commissioning	2 weeks
DISCOM inspection & subsidy credit	3‑4 weeks

Overall, Anita can go from zero to a fully operational rooftop solar system in 8‑10 weeks.

9. Monitoring & Maintenance

Anita’s inverter comes with a mobile app that shows real‑time generation, daily consumption, and cumulative savings. She schedules an annual cleaning of the panels (cost about Rs 2,000) and a five‑year inverter check‑up (≈ Rs 5,000). These small expenses keep the system operating at > 95 % efficiency.

10. Key Takeaway

The illustrative numbers show that much does rooftop solar cost after GST and the central subsidy can be as low as Rs 58,000 for a 2 kW system in 2026, translating to a monthly saving of nearly Rs 2,000. The upfront cost is manageable, especially with EMI options, and the payback period is under three years.

For readers interested in the cost of solar panels specifically in Jaipur after subsidy, see Cost of Solar Panels in Jaipur 2026 (After Subsidy).

---

Remember: The subsidy is only available for grid‑connected residential systems. Commercial rooftops must explore other schemes. Always apply through the official portal pmsuryaghar.gov.in and follow the step‑by‑step roadmap above.

How Much Does Rooftop Solar Cost – Alternatives and Comparison

While the PM Surya Ghar Muft Bijli Yojana offers a generous central subsidy, homeowners often wonder what other financing or incentive options exist. Below we compare three common routes to rooftop solar in 2026:

Feature	Central Subsidy (PM Surya Ghar Muft Bijli Yojana)	State Top‑Up (Variable)	Solar Loan (Bank)
Eligibility	Residential, grid‑connected, no prior subsidy	Same as central, plus state‑specific criteria (e.g., income ceiling)	Any homeowner with stable income; credit check required
Subsidy Amount	Rs 30,000/kW (0‑2 kW) + Rs 18,000/kW (2‑3 kW) – capped at Rs 78,000 for ≥3 kW	Varies by state; may add Rs 10,000‑Rs 30,000 per kW	None (interest‑bearing loan)
Application Portal	pmsuryaghar.gov.in (online)	State DISCOM portal or office; link from the same central portal	Bank’s online loan portal or branch
Disbursement Timing	After DISCOM inspection; typically 2‑4 weeks	After central subsidy; timing differs per state	Loan amount credited immediately after approval
Impact on GST	GST (18 %) is calculated on equipment + labour before subsidy; subsidy does not affect GST liability	Same GST treatment; state top‑up is added after GST calculation	GST is payable on full invoice; loan repayment is separate
Net Cost Example (3 kW)	Pre‑GST: Rs 1,80,000; GST: Rs 32,400; Subsidy: Rs 78,000 → Rs 1,34,400	Assume state adds Rs 20,000/kW (hypothetical) → additional Rs 60,000 → Rs 74,400 net	Loan for full Rs 2,12,400; interest 9 % p.a.; EMI ≈ Rs 2,000 for 5 years
Pros	Large upfront reduction, no repayment, easy to track in proposal software	Additional reduction; often tied to local renewable goals	Immediate cash flow; can be combined with subsidy for minimal outlay
Cons	Requires DISCOM approval and net‑metering; subsidy capped at Rs 78,000	Varies widely; some states have lengthy paperwork	Interest cost increases total spend; loan may affect credit score
Best For	Homeowners wanting minimal out‑of‑pocket expense and who can wait for subsidy credit	Residents in states with generous top‑ups who want extra savings	Those who prefer to spread cost over time and may not qualify for subsidy (e.g., prior subsidy)

When to Use Each Option

1. Central Subsidy Only – Ideal for first‑time solar adopters who meet all eligibility criteria and can wait a few weeks for the subsidy credit. The net cost is low, and the payback period remains short.

2. State Top‑Up + Central Subsidy – If your state’s DISCOM offers a top‑up, combine it with the central subsidy for the deepest discount. Check your state’s official DISCOM website or contact them directly for the exact amount and application steps.

3. Solar Loan – If you need the system installed immediately and cannot wait for the subsidy disbursement, a bank loan can fund the entire invoice. You can still claim the subsidy later, and the loan amount can be reduced by the credited subsidy, lowering your EMI.

How Software Helps You Compare

Solar installers now use platforms that automatically calculate GST, central subsidy, and any state top‑up you enter. This eliminates manual spreadsheet errors and lets you see the exact net cost on the spot. The operating system for solar installers also tracks lead status over WhatsApp, stores all documents for the portal submission, and monitors the subsidy credit timeline—all in one place.

Quick Decision Checklist

Question	Yes → Preferred Path	No → Alternative
Do you own the roof and have a valid electricity connection?	Proceed with central subsidy	Resolve ownership/connection issues first
Is your state offering a top‑up? (Check DISCOM)	Add state top‑up to subsidy calculation	Use central subsidy alone
Do you need cash now and cannot wait for subsidy credit?	Apply for a solar loan (can combine later)	Wait for subsidy; use EMI option from installer if offered
Are you a commercial entity?	Not eligible for this scheme – explore other incentives	Look for commercial schemes like MNRE or SGEN

Bottom Line

The central subsidy remains the most straightforward way to answer the question “how much does rooftop solar cost?” for Indian homeowners in 2026. Adding a state top‑up can further lower the price, while a solar loan offers flexibility at the cost of interest. By using an installer’s GST‑aware proposal tool, you can instantly see the impact of each option and choose the one that fits your budget and timeline.

---

For a deeper dive into regional costs, check out Solar in Coimbatore 2026: Cost, Subsidy, Installers & Savings and compare with the numbers presented here.

Rules, Compliance and Regulations — Staying Within the Law

Installing a rooftop solar system under the PM Surya Ghar Muft Bijli Yojana involves more than just paying a reduced price. Homeowners must follow a clear set of regulatory steps to ensure the subsidy is released and the system operates legally.

1. Eligibility Checklist

• Residential property with a valid electricity connection.
• Roof ownership – renters must obtain written permission from the property owner.
• No prior solar subsidy received for the same roof.
• System type: grid‑connected only; off‑grid or hybrid systems are not covered by the central cash‑in‑hand subsidy.

2. Mandatory Approvals

• DISCOM feasibility: After online registration, the local distribution company must verify roof suitability, shading, and load capacity. This step also generates the net‑metering application number.
• Net‑metering agreement: A formal contract with the DISCOM is required before installation. The agreement specifies the export‑import tariff and the metering equipment to be installed.
• Installation by a registered vendor: Only installers listed on the PM Surya Ghar portal are eligible to claim the subsidy on behalf of the homeowner.

3. Inspection and Certification

Once the system is installed:

1. The installer notifies the DISCOM to schedule an inspection.
2. A certified electrical officer inspects wiring, inverter settings, and safety devices.
3. Upon successful inspection, a Certificate of Commissioning is issued, which is uploaded to the portal.

4. Subsidy Disbursement Process

• After the certification upload, the central authority processes the cash‑in‑hand amount.
• The subsidy is transferred directly to the bank account provided during portal registration.
• The transfer typically occurs within a few weeks of certification, but exact timelines can vary by state.

5. Record‑Keeping

Homeowners should retain:

• Copies of the online application and DISCOM approval.
• The installation invoice showing GST breakdown.
• The Certificate of Commissioning and net‑metering agreement.
• Bank statements confirming subsidy receipt.

These documents may be requested during audits or for future resale of the property.

6. Post‑Installation Compliance

• Annual meter reading: The DISCOM will periodically read the net‑metering meter to calculate net export and import.
• Safety audits: Some states mandate a safety audit every five years to ensure the inverter and wiring remain compliant with the Indian Electricity Rules.
• Reporting any changes: If the roof is altered, or if the system capacity is upgraded, the homeowner must inform the DISCOM and may need to re‑apply for subsidy adjustments.

7. Penalties for Non‑Compliance

• Installing a system without DISCOM approval can lead to disconnection and a fine under the Electricity Act, 2003.
• Falsifying documents on the portal is a criminal offense, punishable with imprisonment and monetary penalties.
• Failure to obtain the net‑metering agreement before commissioning may result in the subsidy being withheld.

8. Staying Updated

Regulations evolve, and state DISCOMs may introduce additional documentation or timeline changes. The official source for the latest rules remains the PM Surya Ghar Muft Bijli Yojana portal at pmsuryaghar.gov.in. Regularly checking this site ensures you remain compliant and avoid delays in subsidy receipt.

By adhering to these compliance steps, homeowners can enjoy a smooth installation experience, secure the cash subsidy, and reap the long‑term financial and environmental benefits of rooftop solar.

Frequently Asked Questions

1. What is the exact amount of central subsidy for a 1 kW rooftop system?

The PM Surya Ghar Muft Bijli Yojana provides ₹30,000 per kW for the first two kilowatts. So a 1 kW system receives a ₹30,000 subsidy.

2. Can I combine the central subsidy with a state top‑up?

Yes. The central subsidy is fixed at ₹78,000 for systems of 3 kW and above. Any state‑level assistance is added on top, but the amount varies by state. Check your local DISCOM for the latest figures.

3. Is GST applied before or after the subsidy?

GST is calculated on the full invoice amount before the subsidy is credited. You pay GST on the hardware and installation cost, then the subsidy is deducted from the total payable amount.

4. How long does it take to receive the subsidy after installation?

The timeline depends on the DISCOM and the inspection authority. Generally, once the net‑metering agreement is in place and the inspection is cleared, the subsidy is credited within a few weeks. Exact processing times are not published centrally.

5. Do I need a separate net‑metering agreement to get the subsidy?

Yes. A net‑metering agreement with your local DISCOM is mandatory before the subsidy can be disbursed. It ensures that excess solar power is fed back to the grid and that you receive appropriate credit.

6. What if I have already received a solar subsidy earlier?

The scheme is only for households that have not availed any prior central solar subsidy. If you have benefited from another central programme, you are ineligible for the PM Surya Ghar Muft Bijli Yojana.

7. Are there any application fees for the central subsidy?

The official guidelines do not mention a specific application fee. All costs are limited to the standard GST and any state‑level processing charges, which vary by region.

8. Can I install the system before getting DISCOM approval?

No. The DISCOM must first verify the feasibility of the rooftop and issue an approval. Installation without this approval may lead to disqualification from the subsidy.

9. Is the subsidy transferable if I sell my house?

The subsidy is credited to the bank account of the applicant whose name appears on the portal registration. If you sell the house, the new owner must apply separately and meet all eligibility criteria.

10. What documentation is required for the portal registration?

You need a valid electricity bill, proof of roof ownership (sale deed or lease), identity proof (Aadhaar/PAN), and bank account details for subsidy credit.

11. Does the scheme cover battery storage?

No. The PM Surya Ghar Muft Bijli Yojana applies only to grid‑connected rooftop solar systems. Battery‑backed or off‑grid installations are not eligible.

12. How is the system size determined for subsidy eligibility?

The subsidy caps at ₹78,000 for any system of 3 kW or larger. For systems below 3 kW, the per‑kilowatt rates apply (₹30,000 per kW for the first 2 kW, then ₹18,000 per kW for the next kilowatt).

13. Can I install solar on a rented roof?

The scheme requires roof ownership rights. If you are a tenant, you cannot directly claim the subsidy unless you have a written agreement with the property owner and the owner applies on your behalf.

14. What happens if my roof is partially shaded?

DISCOM feasibility checks will assess shading. Significant shading may reduce the system size or disqualify the application, as it impacts expected generation and net‑metering benefits.

15. Are there any penalties for incorrect information on the portal?

Providing false information can lead to disqualification and possible legal action under the scheme’s guidelines. Always ensure the data you submit is accurate and verifiable.

16. How does the subsidy affect my loan eligibility?

Banks often consider the subsidy as a reduction in the overall project cost, which can lower the loan amount required. Discuss with your lender to see how the ₹78,000 subsidy can be factored into the financing plan.

17. Can I claim the subsidy if I install the system in a multi‑family building?

The scheme is intended for individual residential units. For apartments, each unit must have a separate metered connection and meet the eligibility criteria independently.

18. Is there a limit on the number of applications per household?

One application per household is allowed. If you have already received the subsidy, you cannot apply again for another system under the same scheme.

19. Does the subsidy cover the cost of installation labor?

The subsidy amount is a flat cash credit and can be used by the applicant to offset any part of the total bill, including hardware, inverter, mounting, and installation labor.

20. What if my DISCOM does not participate in the scheme?

All DISCOMs are mandated to implement the central subsidy. If you face difficulties, contact the state renewable energy department for assistance.

21. How do I track the status of my subsidy application?

Log in to the portal pmsuryaghar.gov.in with your application ID. The dashboard shows each stage – registration, DISCOM approval, inspection, and credit status.

22. Where can I find more information about the scheme?

The official website pmsuryaghar.gov.in provides detailed guidelines, FAQs, and contact numbers for state‑wise assistance.

Conclusion

Understanding how much does rooftop solar cost after GST and the central subsidy is the first step toward a greener, cheaper energy future for Indian homes. By factoring in the ₹78,000 central cash credit, the 18 % GST, and any state‑level top‑ups, a typical 3 kW system can be installed for roughly ₹1.2–1.3 lakh, a fraction of the pre‑tax price. Over a 25‑year lifespan, the system can generate around 90,000 kWh of clean electricity, translating into savings of ₹1.8–2.0 million at current tariffs.

The application process is straightforward: register on the national portal, get DISCOM feasibility approval, install through a registered vendor, secure a net‑metering agreement, and wait for the inspection. Once cleared, the subsidy is transferred directly to your bank account, making the out‑of‑pocket expense predictable and manageable.

For homeowners who prefer a deeper dive into specific system sizes, our detailed post on the Cost of a 1kW Solar System in India 2026 (After Subsidy) breaks down the numbers for smaller installations. If you live in Coimbatore, the city‑specific guide Solar in Coimbatore 2026: Cost, Subsidy, Installers & Savings offers local installer contacts and typical payback periods.

While the subsidy removes a major financial barrier, the real value lies in the long‑term reduction of electricity bills and the environmental benefit of less reliance on fossil fuels. To streamline your journey from inquiry to installation, consider using an installer‑focused operating system like SolarSwytch. It helps solar companies generate GST‑aware proposals, track the subsidy application, and manage the entire installation workflow, ensuring a smooth experience for you as a homeowner.

Ready to take the next step? Visit the official portal pmsuryaghar.gov.in to start your application, gather the required documents, and connect with a certified installer in your area. With the right information and a reliable partner, you can turn rooftop solar from a curiosity into a cost‑effective reality for your household.