10 Best Solar EPC Companies in India (2026) Affordable & Efficient

India is one of the fastest-growing solar energy markets in the world. As of October 2025, the country has installed approximately 129 GW of solar power, and total non-fossil fuel capacity has exceeded 259 GW, accounting for over 50% of India’s total power capacity. This rapid growth is driven by the government’s target of achieving 500 GW of non-fossil energy by 2030, which has attracted massive investments into the solar sector.

In 2024 alone, about 18.5 GW of new large-scale solar capacity was added, nearly three times more than the previous year. Behind this expansion are the solar EPC companies in India—the teams responsible for designing, building, and delivering solar projects that last for decades.

In this article, we highlight the best solar EPC companies in India that are powering the nation’s clean energy transition.

Solar EPC Industry in India: Key Statistics Overview (2025)

Metric	Value
Total Installed Solar Capacity	~132.85 GW (As of Nov 2025)
Projected Solar Capacity Addition (CY 2025)	~32.3 GW (Projected)
Solar’s Share in Total RE Capacity	47.6% (As of Q1 2025)
Total Renewable Energy Capacity	~203.6 GW (As of Nov 2025)
Growth in Rooftop Solar (CY 2024)	4.59 GW added (~53% increase)

What Is a Solar EPC Company?

A Solar EPC Company takes full responsibility for the Solar Project life cycle under the Engineering, Procurement, and Construction (EPC) model. They manage every detail, from the initial site design and engineering (Engineering) to procuring high-quality hardware such as panels and inverters (Procurement) to the installation and commissioning (Construction).

This consolidated strategy significantly reduces customer risk and ensures the project is completed on time, within budget, and meets all performance requirements.

What Is the Market Share of Solar EPC Companies in India?

Here is a general overview of the market share of solar EPC companies in India:

• India’s solar capacity increased sharply to 129 GW in 2025, up from 3 GW in 2014.
• Non-fossil fuel–based power now accounts for over 50% of India’s 500 GW total installed electricity capacity.
• Under PM Surya Ghar, nearly 24 lakh households adopted rooftop solar by December 2025, adding 7 GW of clean energy.
• The​‍​‌‍​‍‌​‍​‌‍​‍‌ government provided subsidies worth ₹13,464.6 crore to facilitate the rooftop solar sector.
• Under PM-KUSUM, the agricultural sector saw a boost in clean energy adoption through the installation of about 9.2 lakh standalone solar pumps.
• The total sanctioned capacity of 55 solar parks, i.e. 40 GW, was approved in 13 states of India as on 31 October 2025.

How This List Is Curated for Solar Installation Companies

Finding the best solar EPC companies in India cannot be done by merely looking at the number of projects. A company should be evaluated holistically across its market standing, technical capabilities, and customer service. The companies listed here have been frontrunners in setting the standards in the industry, and the deciding factors are the following:

• Installed Capacity: Installed capacity is a measure of the company’s total portfolio, expressed in gigawatts (GW) or megawatts (MW) of completed projects, demonstrating the scale and experience.
• Segment Diversification: The segments where a company operates, like utility-scale solar farms, commercial and industrial (C&I) rooftop projects, or floating solar.
• Backward Integration: When a company manufactures its solar cells and modules in-house, it benefits from enhanced quality and optimised costs.
• Global Footprint: The company’s experience executing projects worldwide enables it to bring leading construction methods and advanced technology to the Indian market.
• O&M and Support: Long-term Operation and Maintenance commitment and performance guarantees which protect the client’s return on investment for a period of 25 years.

List of Best Solar EPC Companies in India – Comparison Table

Rank	Company Name	EPC Segment	Installed Capacity / Scale	Key Strength	Best For
1	Tata Power Solar	Utility, C&I, Residential	~6.4 GW+ (Installed)	Brand Trust, Vertical Integration	High-Quality Rooftop & Utility-Scale
2	Sterling & Wilson Solar	Utility-Scale, Hybrid	~19.4 GWp (Global EPC)	Pure-Play Global Expertise, Scale	Large-Scale Utility Projects
3	Adani Solar	Utility-Scale, C&I	~7.3 GW+ (Installed via AGEL)	Massive Manufacturing & Project Size	Gigawatt-Scale Solar Parks
4	L&T Solar	Utility-Scale, Complex Projects	~18 GW+ (Renewable EPC Portfolio)	Decades of Engineering Excellence	Complex, Infrastructure-Grade Projects
5	Waaree Energies	Utility, C&I, Residential	~2.2 GW+ (EPC Projects)	India’s Largest Module Manufacturer	Integrated Supply Chain & Quality
6	Mahindra Susten	Utility-Scale, C&I	~4 GWp (Executed)	Strong Financial Backing, IPP Model	Corporate & Utility Project Finance
7	Vikram Solar	Utility, C&I, Residential	~1.42 GW (EPC Projects)	R&D Focus, High-Efficiency Modules	Technology-Driven Projects, Bifacial
8	KPI Green Energy	C&I, Utility-Scale, IPP	~1 GW+ (Developed Capacity)	Focus on Captive Power & Hybrid Solutions	Commercial & Industrial Clients
9	Jakson Group	C&I, Utility, Hybrid	Significant Installed Base	Diversified Energy Solutions (Solar + Storage)	Reliable Hybrid Power Solutions
10	CleanMax	C&I Rooftop	Largest C&I Rooftop Portfolio	Pioneers of the OPEX/RESCO Model	Commercial & Industrial Rooftop Solar

Top 10 Best Solar EPC Companies in India (2026 – Deatiled Analysis)

1. Tata Power Solar

• Founded In: 1989
• Address: Shatabdi Bhavan, B12/13, Amaltash Marg, Block B, Sector 4, Noida, Uttar Pradesh 201301
• Phone No: 0120 610 2000
• Website Link: https://www.tatapowersolar.com/

Tata Power Solar, a pioneer in the Indian solar space, brings the immense trust and stability of the Tata Group. In the span of over 30 years, the company has taken on projects ranging from small-scale rooftop installations to the largest utility solar parks all over India. Besides that, being a vertically integrated company, it produces its solar cells and modules, which is one of the main reasons for the strict quality control of the whole project supply chain.

In addition to that, the company’s commitment to technology has allowed it to undertake such landmark projects as the world’s largest solar-powered cricket stadium (CCI, Mumbai) and also huge single-axis tracker systems.

• Solar EPC Services: Utility-scale, C&I Rooftop, Residential Rooftop, Module Manufacturing.
• Installed Capacity / Scale: ~6.4 GW+ installed solar capacity as of mid-2024.
• Why it stands out: The trust of an unparalleled brand and over 30 years of track record in the Indian market.
• Best for: Clients who want the most reliable, top-quality, and integrated EPC solution from the best solar EPC companies in India.

2. Sterling & Wilson Solar

• Founded In: 2011
• Address: Ind Estate, 27, NH-19, Block B, Mohan Cooperative Industrial Estate, Saidabad, New Delhi, Delhi 110044
• Phone No: 022 2548 5300
• Website Link: https://www.sterlingandwilsonre.com/

Sterling & Wilson Solar, a Shapoorji Pallonji Group company and now Reliance-backed, is a global pure-play solar EPC provider. The scale of their international experience is vast, with a gigantic global portfolio of over 19.4 GWp spread over various continents. They are able to bring top execution standards to Indian projects.

Their proficiency in deploying state-of-the-art solar tracker technologies, which significantly increase energy generation, makes them in high demand in the utility-scale segment. Besides, they provide the whole package, i.e., EPC for Battery Energy Storage Systems (BESS) and comprehensive Operation & Maintenance (O&M) services.

• Solar EPC Services: Utility-Scale, Floating Solar, Hybrid Power, BESS Solutions.
• Installed Capacity / Scale: ~19.4 GWp global EPC portfolio, recognised as a worldwide leader.
• Why it stands out: Experience and large-scale operations are a huge advantage for them, especially in utility and advanced tracking systems.
• Best for: Large-scale, complex utility and international projects among the best solar EPC companies in India.

3. Adani Solar

• Founded In: 2015
• Address: MS-4, near Medical Chowk, Sector 12, Pratap Vihar, Ghaziabad, Uttar Pradesh 201009
• Phone No: 099904 46344
• Website Link: https://www.adanisolar.com/

Adani Solar is a heavy hitter, mixing considerable manufacturing capacity among solar EPC companies in India with large-scale EPC execution. They operate one of India’s most extensive module manufacturing facilities and make renewable energy systems, giving them a key advantage in cost and supply chain reliability.

Furthermore, their EPC division has been instrumental in delivering numerous gigawatt-scale projects, leveraging in-house solar cell and module manufacturing to optimise project economics. As a result, Adani Green Energy Limited (AGEL) is able to deliver projects of this scale, such as the 30 GW Khavda solar project.

• Solar EPC Services: Utility-Scale, Ground-Mounted Projects, Module Manufacturing.
• Installed Capacity / Scale: ~7.3 GW+ installed solar capacity (via AGEL operational capacity).
• Why it stands out: The size of the projects and the ultimate power over the equipment supply chain from one single unit.
• Best for: Developers and clients focused on utility-sector solar parks and seeking to build them at scale.

4. L&T Solar

• Founded In: 1938 (Parent Company)
• Address: L&T House, Ballard Estate, P.O. Box 278, Mumbai – 400001
• Phone No: 1800 209 4545
• Website Link: https://www.larsentoubro.com/businesses

Larsen & Toubro (L&T) Solar, powered by the heavy-duty engineering and construction expertise of its parent company, brings decades of experience to the clean energy sector. With a renewable EPC portfolio of more than 18 GW, they are the most trusted partner for complex large-scale utility projects.

L&T’s strength is also its scrupulous, time-bound execution approach, which is critical for large infrastructure projects. Furthermore, they are leading the execution of complex projects, including large-scale solar-plus-storage facilities and floating solar installations.

• Solar EPC Services: Utility-Scale, Giga-Scale Storage Integration, Floating Solar, Substation & Grid Interconnection.
• Installed Capacity / Scale: ~18 GW+ renewable EPC portfolio.
• Why it stands out: Incomparable engineering heritage and the ability to handle complex, large-scale integration challenges.
• Best for: Government and IPP projects that demand infrastructure-grade engineering and on-time delivery.

5. Waaree Energies

• Founded In: 1989
• Address: Waaree Energies, 602, 6th Floor, Western Edge-I, Western Express Highway, Borivali (East), Mumbai – 400066
• Phone No: 91 22 6644 4444
• Website Link: https://waaree.com/

Waaree Energies is India’s largest manufacturer and exporter of solar EPC companies. As of FY24, they hold 21% share. Its installed capacity surged from 2 GW in FY21 to 13.3 GW by FY24. Market Cap ₹ 84,974 Cr. Their EPC arm has delivered more than 2.2 GW of projects, leveraging this in-house capability to ensure quality and readily sourced components.

Additionally, their portfolio ranges from residential rooftops to large-scale C&I and utility plants. They are also committed to advancing technology, frequently using their own high-efficiency modules in their projects.

• Solar EPC Services: Utility-Scale, C&I Rooftop, Residential, Manufacturing of Modules and Cells.
• Installed Capacity / Scale: ~2.2 GW+ commissioned EPC projects, 12 GW+ manufacturing capacity.
• Why it stands out: As the largest module manufacturer in India, it offers assured supply and quality control.
• Best for: Clients who prioritise sustainability and want a fully integrated, high-quality local supply chain for their projects.

6. Mahindra Susten

• Founded In: 2010
• Address: Mahindra Towers, G M Bhosale Marg, Worli, Mumbai – 400018
• Phone No: +91 22 24901441
• Website Link: https://www.mahindrasusten.com/

As the eco-friendly technology arm of the reputed Mahindra Group, Mahindra Susten injects the solar EPC sector with the brand’s trust and the Company’s engineering expertise. They are a major Independent Power Producer (IPP) as well as a pure-play EPC provider, having executed over 4 GWp of solar projects in India.

Furthermore, their diverse portfolio covers not only large-scale utility projects but also commercial & industrial (C&I) solutions, thus making them a preferred partner for big corporations. In addition, the financial support of the Mahindra Group provides the stability that is required for the successful execution of large, long-term power projects.

• Solar EPC Services: Utility-Scale, C&I Solutions, IPP Development, O&M.
• Installed Capacity / Scale: ~4 GWp executed projects.
• Why it stands out: Great brand reputation, financial stability, and the dual role of the company as an IPP and an EPC make it unique.
• Best for: Corporations and developers who are in search of a stable partner, backed by a brand, to manage their solar assets.

7. Vikram Solar

• Founded In: 2006
• Address:  Plot No. 448, AIHP Milestone, 4th floor, 451, Udyog Vihar Phase V Rd, Gurugram, Haryana 122016
• Phone No: 0124 496 2100
• Website Link: https://www.vikramsolar.com/

Vikram Solar is a prominent Tier-1 solar module manufacturer that leverages its robust manufacturing base to attract EPC services. They have an annual module manufacturing capacity of 3.5 GW, and they have successfully completed 1.42 GW of EPC projects, with a focus on technological innovation.

In addition, their projects almost always use frontier products such as bifacial modules and specially designed mounting structures to enhance energy generation and efficiency. Also, their services are spread over 39 countries; thus, they bring foreign experience to their EPC execution in India.

• Solar EPC Services: Utility-Scale, C&I Rooftop, Module Manufacturing, Technology Integration.
• Installed Capacity / Scale: ~1.42 GW of EPC projects completed.
• Why it stands out: They are a Tier-1 manufacturer of high-efficiency modules (used in their own EPC projects), which makes them unique.
• Best for: Customers who are willing to leverage the latest solar module technology in their projects.

8. KPI Green Energy

• Founded In: 2008
• Address: KP House, Near KP Circle, Canal Road, Bhatar, Surat – 395017, Gujarat, India
• Phone No: +91 261 2244757
• Website Link: https://www.kpigreenenergy.com/

KPI Green Energy went on to dominate the market by majorly focusing on solar EPC companies in India, mainly for commercial and industrial (C&I) clients through IPP and captive power models. They have developed over 1 GW of solar capacity and have placed significant bets on Gujarat, Maharashtra, and Rajasthan.

Additionally, they are well-suited to a hybrid energy model, where solar is integrated with conventional energy or energy storage is added to the system to ensure continuous power consumption, which is a big win for industrial clients. In addition, their proficiency allows them to keep the commissioning process short while still ensuring high quality.

• Solar EPC Services: Captive Power Projects, IPP Model, C&I Solar, Hybrid Energy Solutions.
• Installed Capacity / Scale: ~1 GW+ solar capacity developed.
• Why it stands out: Mastery of the IPP/Captive model, along with hybrid power systems for the most reliable industrial supply.
• Best for: C&I clients who are looking for reliable and long-term power purchase agreements.

9. Jakson Group

• Founded In: 1947
• Address: Jakson House, G-1, Block B-1, Mohan Cooperative Industrial Estate, New Delhi – 110044
• Phone No: 0120-4302600
• Website Link: https://www.jakson.com/

Jakson Group is a diversified energy solutions provider with a long legacy, going beyond just solar EPC to include expertise in diesel generators, battery storage, and microgrids. With this broad experience, they are able to successfully create complex hybrid power solutions that ensure reliability for the clients.

Additionally, their solar EPC is a wide range of different sectors, like institutional, commercial, and industrial. Further, they use their engineering prowess to deliver tailor-made solutions, thus consolidating their position as one of the most trustworthy solar EPC companies in India.

• Solar EPC Services: Rooftop Solar, Ground-Mounted Systems, Solar-Diesel Hybrid, Battery Storage.
• Installed Capacity / Scale: Extensive installed base across C&I and utility.
• Why it stands out: The capability to provide full hybrid and backup power solutions, not only solar.
• Best for: Clients who require integrated power solutions, including battery storage or diesel hybrid systems.

10. CleanMax

• Founded In: 2011
• Address: First Floor, Clean Max Enviro Energy Solutions Private Limited, The Peach Tree Complex, Sushant Lok Phase I, Gurugram, Haryana 122009
• Phone No: 0124 406 7893
• Website Link: https://www.cleanmax.com/

CleanMax is a leading name primarily involved in the commercial and industrial (C&I) rooftop and distributed solar segment. They are the first movers of the OPEX (Operational Expenditure) or RESCO (Renewable Energy Service Company) model in India, under which they construct, own, and operate the plant on the client’s roof, thus selling power at a lower rate.

Additionally, their main business is offering turnkey EPC services to corporates, ensuring high-quality construction and long-term asset performance. Moreover, they have been instrumental in reducing the carbon footprints of several top multinational and Indian corporations, thereby earning a reputation for high-quality execution.

• Solar EPC Services: C&I Rooftop Solar, Distributed Generation, Solar Farm for Captive Use, O&M.
• Installed Capacity / Scale: One of the largest C&I rooftop solar portfolios in India.
• Why it stands out: C&I rooftop sector leadership and the OPEX/RESCO finance model pioneer.
• Best for: Large corporations and industries seeking rooftop solar without upfront capital investment.

Conclusion

The solar industry in India is right now like a gold mine, and the expertise of the best solar EPC companies in India is driving the massive growth of the industry. These companies are not only building power plants but also laying the foundation of India’s green energy future. Simply put, the signing of the right EPC partner is the most critical move in any solar endeavour, as it determines performance and returns for the next 25 years. This list serves as a clarifying point for finding a dependable and skilled supplier that suits your particular solar requirements.

FAQs

What does a solar EPC company do?

A solar EPC company is the one that manages the entire project from the very beginning to the end. The company is responsible for Engineering (design and planning), Procurement (sourcing components), and Construction (installation and commissioning) of the solar power system.

Which is India’s top 1 solar EPC company?

Tata Power Solar and Sterling & Wilson Solar are the two companies that are most commonly referred to as leaders due to the vast amounts of their installed capacities and their long years of experience. But the best depends on your project type (utility vs. rooftop).

How do I find the right EPC partner for my project?

Checking a company’s track record is the first thing you should do. Also, see if they have done projects similar to yours (rooftop or ground-mount), if they use high-quality components, and if they give you complete post-installation support for a long time.

What is the usual duration of a solar EPC project?

The timeline depends a lot on the size of the project. For example, the installation of a residential rooftop system can be done in 45–60 days maximum, while setting up a huge utility-scale solar farm may take 6 to 12 months or even longer, which also includes all the approvals and grid connection.

Are EPC companies involved in government subsidies and approval?

Yes,​‍​‌‍​‍‌​‍​‌‍​‍‌ almost all top solar EPC companies in India provide comprehensive “turnkey” solutions that extend to helping customers with net-metering applications, getting the necessary permissions from the local distribution company, and availing attractive government subsidies such as those under the PM Surya Ghar ​‍​‌‍​‍‌​‍​‌‍​‍‌scheme.