India’s solar industry has grown far beyond its early experimental stage. With the government targeting 500 GW of non-fossil fuel capacity by 2030, the sector now includes a large number of solar manufacturers, installers and service providers competing for customers.
With so many companies in the market, selecting the right solar partner can have a direct impact on panel performance, system reliability, installation quality and after-sales support. Here is a closer look at five prominent solar companies in India and the factors buyers should consider before making a decision.
What to Check Before Choosing a Solar Company
A company’s visibility online does not necessarily indicate the quality of its products or services. Buyers should look beyond pricing and marketing claims and examine several important factors.
Manufacturing experience: Look at how long the company has actually been manufacturing solar equipment rather than simply selling products from other manufacturers.
Certification and compliance: Check the relevant BIS certification, ALMM status of the specific module model and DCR eligibility when the project is covered by a government scheme requiring domestically manufactured cells and modules.
Warranty coverage: Compare both product and performance warranties. Pay attention to degradation limits, exclusions and the process for making a warranty claim instead of considering only the number of warranty years.
After-sales support: A reliable service network is important, particularly for customers outside major cities. Delays in getting technical support can affect the performance of a solar installation.
Installation standards: Buyers should check the installer’s technical qualifications, workmanship warranty, safety procedures and local service capabilities. This remains important whether the installation is carried out directly by the company or through an authorised partner.
Price should therefore be considered alongside these factors rather than used as the only basis for comparison.
Top 5 Solar Energy Companies in India in 2026
The solar industry continues to change as manufacturing capacity expands and newer technologies enter the market. The following five companies represent a shortlist of established names rather than a permanent ranking.
| Company | Known For | Years Active |
|---|---|---|
| Eastman Solar | Solar solutions, energy storage and power electronics | Founded 2000 |
| Waaree Energies | Large-scale solar PV module manufacturing | Founded 1990 |
| Adani Solar | Integrated cell and module production | Founded 2017 |
| Tata Power Solar | More than three decades of manufacturing experience | Founded 1989 |
| Vikram Solar | Rooftop and ground-mounted solar projects | Founded 2005 |
1. Eastman Solar
Eastman Auto and Power Limited (EAPL) has been active in the energy transition sector since 2000. Its Eastman Solar business combines solar manufacturing with expertise in energy storage and power electronics. The company also operates in e-mobility and backup energy solutions, giving it a broader technology portfolio.
Its solar range includes monocrystalline, bifacial and TOPCon modules. The company’s approach covers several stages of the solar value chain, including manufacturing, research and development, project support and after-sales services.
Eastman Solar has seven manufacturing facilities and a distribution network consisting of more than 1,900 distributors and over 3,000 service partners across India.
The company also reports 11.5 GWh of annualised battery energy storage capacity and a power electronics manufacturing capacity of 2 million units. It describes itself as the largest manufacturer of solar tubular batteries in India.
Its research and development operations include a team of more than 200 members, along with an international Technology Centre in Hong Kong. The R&D team supports product development across the Eastman and Addo brands.
For homeowners looking for a company that can provide multiple parts of the solar journey through one wider ecosystem, Eastman Solar is among the names to consider.
2. Waaree Energies
Waaree Energies is one of India’s major solar PV module manufacturers. The company has approximately 15 GW of installed module manufacturing capacity and supplies products for residential, commercial and utility-scale applications.
Its portfolio includes technologies such as Mono PERC, bifacial and TOPCon modules.
Waaree’s key strengths include:
- Around 15 GW of installed domestic module manufacturing capacity
- Products ranging from residential solar solutions to utility-scale modules
- A broad dealer and installer network across India
Its manufacturing scale has made Waaree a prominent name in discussions around India’s solar industry. Purchasing through an established brand can also provide clearer product authenticity and warranty processes.
However, buyers should note that Waaree primarily operates through dealers and installers and does not provide residential EPC services directly.
3. Adani Solar
Adani Solar entered the solar manufacturing business in 2017 and has developed an integrated manufacturing chain covering ingots, wafers, cells and modules.
The company currently reports 10 GW of module manufacturing capacity, 4 GW of cell capacity and 2 GW of ingot and wafer capacity. Its module portfolio includes Mono PERC and TOPCon technologies.
Its manufacturing structure includes:
- Integrated production from ingots and wafers through to finished modules
- Expansion toward 10 GW of integrated cell and module capacity
- Support from the wider infrastructure and project execution capabilities of the Adani Group
For larger commercial or utility-scale projects, an integrated manufacturing setup can be particularly relevant when supply consistency and production control are important considerations.
4. Tata Power Solar
Tata Power Solar has more than 30 years of experience in solar manufacturing and project execution. TP Solar, which is part of Tata Power Renewable Energy, operates a 4.3 GW solar cell and module manufacturing facility in Tirunelveli.
Tata Power’s rooftop solar business has also crossed 4 GWp in cumulative installations, according to current company profiles.
Key highlights include:
- More than three decades of solar manufacturing experience
- A 4.3 GW integrated, AI-driven production facility in Tirunelveli
- More than 4 GWp of cumulative rooftop solar installations
The company’s combination of manufacturing capabilities and experience in rooftop projects gives it a presence across different parts of the solar market.
5. Vikram Solar
Vikram Solar is involved in solar PV module manufacturing as well as EPC and operations and maintenance services. Its project portfolio includes rooftop and ground-mounted installations for government and private-sector customers.
The company reported an EPC portfolio of approximately 1.41 GW as of March 2025 and has continued to expand its module manufacturing capabilities.
Its business is supported by experience across large ground-mounted projects and rooftop installations, along with established relationships with EPC contractors across India.
Vikram Solar has built its presence around module manufacturing, project execution and long-term service capabilities, making it another established name in the Indian solar market.
How to Select the Right Solar Company
There is no single solar company that will meet every buyer’s requirements. A homeowner installing a 3 kW rooftop system may have very different priorities from a commercial developer purchasing thousands of modules.
For buyers focused heavily on manufacturing capacity and bulk requirements, companies such as Waaree Energies and Adani Solar may be relevant options to examine. Customers looking for an established brand with extensive infrastructure and nationwide reach can consider Tata Power Solar. Those looking for broader installation and support capabilities can also examine companies such as Eastman Solar.
Regardless of the company selected, buyers should verify certifications, check the applicable module eligibility requirements, ask for references from installations that are at least two years old and carefully review warranty conditions before signing a contract.
Solar panels are becoming increasingly similar across the market in terms of available technologies. The manufacturer, installer and service network supporting the system can therefore be just as important as the panel specifications themselves.
Disclaimer
This article is intended for general informational purposes only. Company capacities, product offerings, certifications, service networks and other business details may change over time. Buyers should independently verify the latest specifications, warranties, certifications, pricing and installation terms with the respective company or authorised provider before making a purchase or investment decision.