Top 10 Solar Companies in India 2026

India installed 44.61 GW of solar in FY2025-26. In just one year. That’s huge when you think about how little capacity the country had 10 years ago.

Total installed solar capacity reached 168.04 GW as of August 31, 2026, including 32.59 GW of grid-connected rooftop installations. And it’s not only about more rooftops. Indian companies are now making their own cells, ingots and wafers, adding battery storage, and building gigawatt-scale projects everywhere from Khavda in Gujarat to Egypt and South Africa.

Many of these companies will be familiar to you. Others operate behind the scenes, building the factories that produce solar cells and panels.

Below are the top 10 solar companies in India you should know about in 2026, ranked on generation scale, manufacturing capacity and project execution.

Why Businesses Are Switching to Solar

There are plenty of reasons for a business to switch to solar. Here are the big ones.

Lower Power Bills

Power bills keep rising for commercial and industrial consumers. A solar plant on your roof or through open access can cover a large share of your power needs for the next 25 years, and those savings show up directly on your P&L.

Backup Through Storage

Pairing solar with battery storage lets your facility keep running during peak hours and power outages.

Meeting ESG Goals

Solar helps you hit your ESG goals. Many international clients now ask vendors to disclose their yearly carbon emissions, and going solar can sharply lower your carbon footprint.

Policy Support

With government initiatives and the ALMM list of approved modules and cells, it’s easier than ever to buy from local manufacturers.

Top 10 Solar Companies in India at a Glance

Rank	Company	Core Segment	Key Figure
1	Adani Solar and Adani Green Energy	Manufacturing and utility-scale generation	20+ GW operational renewables (July 2026)
2	Tata Power Solar	Rooftop, EPC and manufacturing	4.8 GWp rooftop across 370,000+ sites
3	Waaree Energies	Module manufacturing and EPC	12.6 GW modules produced (FY26)
4	ReNew	Generation and manufacturing	About 20 GW gross portfolio
5	Vikram Solar	Modules and EPC	About 15.5 GW annual capacity
6	Premier Energies	Cells and modules	11.1 GW module capacity
7	NTPC Green Energy	Utility-scale generation	10,126 MW operational
8	Sterling and Wilson Renewable Energy	Renewable EPC	₹12,480 crore order book
9	Goldi Solar	Modules, rooftop and EPC	About 14.7 GW module capacity
10	Saatvik Green Energy	Modules, EPC and O&M	About 4.8 GW at Ambala

Top 10 Solar Companies in India (2026)

Here’s the full list, from the giants building gigawatt-scale parks to the manufacturers making cells and modules at home.

1. Adani Solar and Adani Green Energy

The Adani Group has its hands in every part of the solar industry, from cell and module manufacturing at its Mundra facility in Gujarat, which started in 2016, to utility-scale parks under Adani Green Energy such as Khavda in Gujarat. Combined, that makes Adani one of the largest players in Indian solar.

Adani Green Energy had more than 20 GW of operational renewable capacity as of July 2026, including approximately 14.2 GW of solar and 3.55 GWh of battery storage. It has around 9.5 GW of solar commissioned at Khavda, part of a development planned at up to 30 GW. Adani Green plans to reach 50 GW by 2030, while Adani Solar is taking its Mundra manufacturing base toward 10 GW of integrated capacity.

Key Solar Solutions

✔ Solar cells and modules – Mundra, Gujarat
✔ Utility-scale solar parks – Khavda renewable energy complex
✔ Battery storage – 3.55 GWh operational
✔ Hybrid wind-solar projects

Best for: Utility-scale projects and large module orders.

2. Tata Power Solar

Tata Power Solar started in 1989 as Tata BP Solar, making it one of India’s oldest solar companies. It now forms part of Tata Power Renewable Energy, which offers utility-scale projects, rooftop solar, EPC and manufacturing.

The company has around 11.6 GW of renewable projects in its portfolio, with 6.3 GW operational and 5.1 GW under construction. It commissioned 2.5 GW in FY2025-26 and has completed over 10 GW of solar EPC work. Its manufacturing arm, TP Solar, produced around 3.83 GW of modules and 3.76 GW of cells in the year, and its rooftop division has installed over 4.8 GWp across 370,000+ sites.

Key Solar Solutions

✔ Rooftop solar for homes and businesses
✔ Utility-scale solar EPC
✔ Cells and modules – TP Solar
✔ Ingot and wafer expansion – 10 GW planned

Best for: Homeowners and businesses that want a trusted rooftop brand.

3. Waaree Energies

Mumbai-based Waaree Energies is one of India’s largest module manufacturers. It operates across manufacturing, EPC and renewable energy, supplying developers, EPC contractors and overseas buyers.

In FY2025-26, Waaree manufactured around 12.6 GW of modules. It’s moving further upstream, with construction under way on a 10 GW integrated ingot and wafer facility in Nagpur costing about ₹6,200 crore. It has also sanctioned ₹3,900 crore for a solar glass plant and commissioned another 3 GW module facility at Samakhiali, Gujarat.

Key Solar Solutions

✔ Solar modules – domestic and export
✔ EPC services
✔ Ingot and wafer manufacturing – Nagpur
✔ Solar glass – plant approved

Best for: Developers and EPC firms that need large module volumes.

4. ReNew

Gurugram-based ReNew is one of the largest renewable energy companies in India. It has been expanding into manufacturing to complement its renewable generation business.

ReNew had built its gross renewable portfolio to around 20 GW as of March 31, 2026, with 12.6 GW commissioned and 1.7 GW of battery storage. It has 6.4 GW of module capacity and 2.5 GW of cell capacity across its factories, and it manufactured over 4.1 GW of modules in FY2025-26. It’s also developing a 6.5 GW ingot-wafer facility in Andhra Pradesh at a cost of around ₹4,200 crore.

Key Solar Solutions

✔ Utility-scale solar and wind
✔ Battery storage – 1.7 GW
✔ Modules and cells
✔ Ingot-wafer manufacturing – Andhra Pradesh

Best for: Corporates buying renewable power at scale.

5. Vikram Solar

Vikram Solar was established in 2006 and is based in Kolkata. It is one of India’s leading module manufacturers, with an international presence in 39 countries, and it also offers EPC and project services.

It crossed 10 GW of cumulative module deployments worldwide in April 2026, then inaugurated a new 6 GW module facility at Gangaikondan, Tamil Nadu, bringing its capacity to around 15.5 GW a year. In September 2026, EUPD Research named Vikram Solar a Top Brand PV India for modules for the second year in a row. It is also expanding into cell production and plans around 5 GWh of battery storage capacity by FY2027.

Key Solar Solutions

✔ High-efficiency solar modules
✔ EPC and project solutions
✔ Cell manufacturing – in progress
✔ Battery storage – 5 GWh planned

Best for: Premium projects and export-grade modules.

6. Premier Energies

Hyderabad-based Premier Energies is an integrated solar cell and module manufacturer and one of the fastest-growing companies in the sector, supplying IPPs, module makers and EPC contractors.

Premier has around 11.1 GW of module capacity and 3.6 GW of cell capacity after commissioning a new 5.6 GW module facility in Telangana. Its FY26 total income grew about 21% to around ₹8,026 crore, while profit after tax jumped 61% year on year. Its order book stood at around ₹14,010 crore, and Terawatt PV ranked it among the top 13 module manufacturers in the world.

Key Solar Solutions

✔ Solar cells – TOPCon and Mono PERC
✔ TOPCon solar modules
✔ Battery storage – 12 GWh planned
✔ Supply to IPPs and EPC contractors

Best for: Manufacturers and developers that need domestic cells.

7. NTPC Green Energy

NTPC Green Energy is the renewable energy arm of NTPC, one of the largest power generation companies in India. With government backing and deep financial resources, it has become one of the country’s largest utility-scale solar developers.

It had 10,126 MW of operational renewable capacity as of March 31, 2026, after adding 4,225 MW in FY2025-26. Those additions included 2,560 MW at Khavda, 500 MW at Bhadla, 250 MW at Pavagada and 250 MW at Kadapa. NTPC Green is aiming for 60 GW of capacity by 2032.

Key Solar Solutions

✔ Utility-scale solar parks
✔ Hybrid renewable projects
✔ Government-backed project pipeline

Best for: Tracking India’s public-sector renewable push and large utility-scale supply.

8. Sterling and Wilson Renewable Energy

Mumbai-based Sterling and Wilson Renewable Energy is a global pure-play renewable EPC company, providing services for utility-scale solar, floating solar, hybrid, storage and wind projects. It operates in 28 countries.

FY2026 was its best year yet, with ₹7,548 crore in revenue and around 4.5 GW (AC) commissioned. By September 2026, its order book stood at ₹12,480 crore and its O&M portfolio at 18.9 GW. Recent wins include a 534.3 MWp solar project in Rajasthan, two battery storage projects in South Africa and the West Minya solar project in Egypt with Hassan Allam Construction.

Key Solar Solutions

✔ Utility-scale solar EPC
✔ Floating and hybrid solar
✔ Battery storage EPC
✔ Operations and maintenance – 18.9 GW

Best for: Developers that need a turnkey EPC partner in India or abroad.

9. Goldi Solar

Goldi Solar was founded in 2011 by Ishver Dholakiya. Based in Surat, Gujarat, it is one of the fastest-growing solar module manufacturers in India, commonly seen on residential and commercial rooftops, and it also provides EPC services.

The group now has around 14.7 GW of operational module capacity, according to ICRA, helped by its AI-driven facility at Kosamba near Surat. The plant uses high-speed stringers, automated optical inspection and robotic lamination. Goldi is building around 1.2 GW of cell manufacturing capacity, at a cost of about ₹800 crore, to reduce its dependence on imported cells.

Key Solar Solutions

✔ Solar modules
✔ Rooftop solar products
✔ EPC services
✔ Cell manufacturing – 1.2 GW in progress

Best for: Residential and commercial rooftop buyers.

10. Saatvik Green Energy

Saatvik Green Energy was incorporated in 2015 and manufactures solar modules at three facilities in Ambala, Haryana. It also provides EPC and O&M services, and it went public in September 2025 with an IPO that was oversubscribed 6.57 times.

Saatvik has expanded its Ambala capacity to around 4.8 GW and is building an integrated facility at Gopalpur, Odisha, with 4 GW of module and 4.8 GW of cell capacity. Mercom named it one of India’s leading module suppliers in 2024. Offering both manufacturing and project services makes Saatvik a good fit for mid-sized C&I customers.

Key Solar Solutions

✔ Solar modules
✔ EPC services
✔ Operations and maintenance
✔ Integrated cell and module plant – Odisha

Best for: Mid-sized commercial and industrial customers.

How to Choose the Right Solar Company for Your Business

The lowest quote often isn’t the best deal. Solar plants run for 25 years or more, so your partner is a decision you’ll live with long after installation day. Cover these points before you decide.

Check ALMM Compliance

Ask whether the modules, and now the cells, are on the government’s Approved List of Models and Manufacturers (ALMM). That affects subsidy eligibility, government-linked projects and long-term quality.

Talk to Past Clients

Ask for references from commissioned projects similar in size and type to yours, then speak to those clients. A company with a strong rooftop record may not be the right fit for a 50 MW open-access plant, and the opposite can be true too.

Compare Cost per Watt

Total system price doesn’t tell you about module quality, inverter brand or mounting structure. Comparing cost per watt with expected generation gives you apples-to-apples numbers.

Read the Warranty

Most quality modules come with 25-year performance warranties. Ask what’s covered, who will honor the warranty years from now, and whether the installer will still be in business.

Plan for Storage

Battery storage is quickly becoming a standard part of solar projects. Pick a partner that can add storage now or later without redesigning your whole system.

Insist on O&M Support

Panels get dusty. Inverters break. Performance creeps down, and you don’t notice until it’s too late. Insist on monitoring, scheduled cleaning and service response times in your contract from day one.

Frequently Asked Questions About Solar Companies in India

Which is the best solar company in India?

Different solar companies suit different buyers. Adani, Tata Power and ReNew lead on scale; Waaree Energies, Vikram Solar and Premier Energies stand out for modules; and Sterling and Wilson is a strong choice for large turnkey EPC projects. Whether you need panels, a rooftop system or a utility-scale plant may point you to different companies.

Which company makes the most solar panels in India?

Waaree Energies produced about 12.6 GW of modules in FY2025-26, while Vikram Solar’s manufacturing capacity is about 15.5 GW a year. Goldi Solar, Premier Energies and Adani Solar are also large producers.

How much solar capacity does India have?

India’s cumulative installed solar capacity reached 168.04 GW as of August 31, 2026. This includes 32.59 GW of grid-connected rooftop installations.

How long do solar panels last?

Most solar panels have a life expectancy of 25 to 30 years, and manufacturers typically provide a 25-year performance warranty.

Conclusion

India’s solar sector has changed dramatically in a decade. What was once small and fragmented is now booming, with developers building gigawatt-scale parks and manufacturers racing to make everything at home, from wafers and cells to batteries.

The right partner depends on your project size, location, budget and how much long-term support you need. But the best solar companies in India share one thing: they build plants that keep performing for decades, not just panels that look good on day one.