India’s solar energy is growing faster than ever before. The country wants to make 500 GW of clean energy by 2030. As of February 2025, India already has 167,709.53 MW (167.71 GW) of renewable energy set up, with solar power being a big part of this (MNRE, 2025).
The Engineering, Procurement and Construction (EPC) companies do everything needed to build solar power systems. This means a solar EPC company in India will plan the project, get all the materials, and then build the whole system. They’re really important because they make it easier to set up solar systems across the country, helping it move towards using more clean energy.
What is a Solar EPC Company?
Top solar EPC companies in India offer complete services for solar power projects from initial design to final commissioning. These companies are responsible for:
• Engineering: Designing the solar power system, including panel layout, electrical systems, and structural components.
• Procurement: Sourcing top-quality solar panels, inverters, mounting structures, and other components.
• Construction: Installing the system, connecting it to the grid, and ensuring it meets all regulatory requirements.
In essence, most EPC solar companies provide a turnkey solution for a solar project, from start to finish, and deliver a fully operational system to the client.
Also Read: Enerparc Energy India Secures Top 3 Spot in Mercom India Solar Market Leaderboard 2024
Top 10 Solar EPC Companies in India in 2025
These are the top 10 EPC companies in India that offer entire solar solutions with engineering excellence, premium components and seamless construction for maximum energy yield. Due to green energy goals being pushed by businesses and governments alike, the industry has been booming with the demand for solar EPC contractors.
Enerparc Energy
Enerparc Energy, part of Enerparc AG, Germany, has established itself as the leading solar EPC company in India. Our company has over 12 years of experience in the Indian market and more than 4,500 MW of solar capacity installed globally, which brings international expertise to the Indian solar sector.
Strengths:
• Technical expertise in designing world-class PV systems
• Comprehensive EPC services for both rooftop and ground-mounted projects
• Strong focus on quality and performance
• Impressive track record with over 600 projects executed globally
Enerparc is a specialist in tailor-made solar solutions for industrial and commercial clients with a strong focus on high-quality engineering and design.
With a Net Promoter Score (NPS) of 90, we’re India’s only solar energy company to have such a high customer satisfaction rating and innovative approach to solar installations.
Also Read: Enerparc Energy India Honoured for Pioneering 2.7 MW Rooftop Solar Project
Sterling & Wilson
Sterling & Wilson Renewable Energy Limited is one of the biggest solar EPC companies that builds solar energy projects. They work not just in India but in many countries around the world. The company has finished more than 21.4 GW of solar projects across 28 different countries. This makes them one of the top companies in the solar industry.
Strengths:
• Extensive experience in utility-scale solar projects
• Strong international presence
• Comprehensive O&M services
• Advanced project management capabilities
They’ve delivered a few of the largest solar parks, including the 1,177 MW Sweihan project in Abu Dhabi, which was the world’s largest single-location solar PV plant when commissioned.
Adani Solar
Adani Solar is the fastest-growing rooftop and distributed solar EPC company in India, with over 250 MW commissioned and over 400 MW under execution. It is part of the Adani Group and enjoys strong financial backing and a large infrastructure.
Strengths:
• Vertically integrated operations
• Strong presence in utility-scale projects
• Robust supply chain management
• Platinum-rated manufacturing facility
In addition, Adani Solar is India’s largest vertically integrated solar cell and module manufacturer, which provides it an edge in the EPC market.
Tata Power Solar
Tata Power Solar is a company that’s fully owned by Tata Power. It’s one of the oldest and most trusted EPC companies in India. The company has been working on solar energy for more than 30 years. They’ve done 1.5 GW of utility-scale projects. Because of their experience and success, they’ve become a leader in India’s solar energy market.
Strengths:
• Strong brand reputation
• End-to-end solar solutions
• Extensive experience in both rooftop and utility-scale projects
• Robust R&D capabilities
Recently, Tata Power Solar has expanded its manufacturing capacity of cells from 300 MW to 530 MW with Mono PERC technology and modules from 400 MW to 580 MW with Mono PERC Half-cut technology.
L&T Solar
Larsen & Toubro’s renewable energy division has become a major solar EPC company in India. With a portfolio of 22 GWp of renewable EPC experience, L&T is not just a big player in India but a leading player globally.
Strengths:
• Strong engineering capabilities
• Extensive experience in infrastructure projects
• Robust financial position
• Comprehensive project management
They’ve been associated with several landmark projects such as the development of solar parks in Rajasthan, Gujarat and Tamil Nadu.
Vikram Solar
Looking at the list of EPC companies in India, Vikram Solar also catches our attention as they’ve 1.03 GW of solar projects installed and a manufacturing capacity of 4.5 GW.
Strengths:
• High-quality solar modules
• Strong focus on R&D
• Comprehensive EPC services
• International certifications
Vikram Solar has executed projects for prestigious companies such as NTPC, ISRO, WBSEDCL, and various government and private institutions in 23 states and 3 union territories of India.
Mahindra Susten
Mahindra Susten is part of the bigger Mahindra Group and is one of the top EPC companies in India. The company handles all parts of solar projects from start to finish, including EPC services for utility-scale and rooftop projects.
Strengths:
• Innovative engineering solutions
• Strong project management capabilities
• Comprehensive O&M services
• Backed by the Mahindra Group’s reputation
The company has approximately 1.65 GWp+ solar assets in India and has another 3.1 GWp+ under development.
Azure Power
Azure Power is a major solar EPC company in India with a strong independent power production division. The company has completed more than 4.3 GW of solar energy projects, which can be found in 24 different states across the country.
Strengths:
• Extensive experience in utility-scale projects
• Strong focus on sustainability
• Innovative financing solutions
• Robust O&M capabilities
They’ve been instrumental in developing solar projects in remote and difficult-to-develop locations in India.
ACME Solar
With a portfolio of around 8.5 GW, ACME Solar has become one of the largest solar developers. They’re a leading solar EPC company in India offering complete services for ground-mounted and rooftop solar installations.
Strengths:
• Strong focus on innovation
• Extensive experience in utility-scale projects
• Robust project management capabilities
• Expansion into green hydrogen and ammonia production
ACME Solar has consistently acted as a frontrunner in reducing solar tariffs in India, making solar power cheaper in the process.
ReNew Power
ReNew Power is a premier solar EPC company in India that makes clean energy. They’re known for being really good at doing solar energy projects from start to finish. Over time, the company has completed projects across the country that have generated about 15.6 GW of renewable energy.
Strengths:
• Strong financial backing
• Extensive experience in utility-scale projects
• Innovative technology solutions
• Comprehensive O&M services
Since its inception, ReNew Power has been instrumental in driving the growth of renewable energy in India to be a full-service decarbonisation company with solutions beyond just solar and wind projects.
Also Read: Enerparc Energy Initiates 38 MW Solar Project in Collaboration with Waaree Energies
Frequently Asked Questions (FAQs)
What factors should I consider when selecting a solar EPC company in India?
Consider experience, project portfolio, technology expertise, financial stability, warranty terms, after-sales service, and customer satisfaction ratings.
How long does it typically take for a solar EPC company in India to complete a commercial installation?
Commercial solar installations typically take 4-12 weeks, depending on system size, site conditions, and permitting requirements.
What maintenance services do top solar EPC companies offer after installation is complete?
Leading EPC companies like Enerparc provide monitoring, cleaning, preventive maintenance, performance analysis, troubleshooting, and warranty support for optimal system performance.
To Sum Up
Solar EPC companies are emerging as leaders in driving India’s renewable energy transformation via their end-to-end solutions, ranging from design to commissioning. With technical expertise, quality procurement, and efficient construction practices, the top 10 players, including Enerparc, Sterling & Wilson, and Adani Solar, lead the chart.
Given that India is set to achieve its 500 GW renewable energy goal by 2030, these companies will be the best solar EPC companies in India in the delivery of solar infrastructure. Contact Enerparc today for industry-leading solar solutions and 90+ NPS satisfaction in a proven record.
