Top Solar Companies in India 2026
India's solar sector has grown into a ₹1+ lakh crore industry. The companies leading this growth fall into two categories: solar panel manufacturers (who make the panels) and solar project developers/EPC companies (who design and install systems). Most top Indian solar companies do both.
Here are the top 10 solar companies in India by reputation, scale, and reliability for Indian homeowners and businesses.
Top Solar Manufacturers in India
1. Waaree Energies
- Type: Solar panel manufacturer + EPC
- Capacity: 13 GW annual manufacturing capacity (largest in India)
- Headquarters: Mumbai, Maharashtra
- Products: Mono PERC, TOPCon, Bifacial panels
- Warranty: 12-year product + 25-year performance
- IPO: Listed on BSE/NSE (October 2024)
- Why choose: India's largest solar panel maker, good service network, competitive prices, domestic manufacturer (eligible for domestic content requirement projects)
- Service cities: Pan-India presence
2. Adani Solar (Adani Green Energy)
- Type: Manufacturer + largest solar power plant developer
- Capacity: 4 GW panel manufacturing + 10.9 GW operational solar capacity
- Headquarters: Ahmedabad, Gujarat
- Products: Mono PERC, Bifacial, TOPCon (in development)
- Why choose: Proven at massive scale, part of Adani Group (financial stability), strong in C&I (commercial & industrial) segment
- Notable projects: Kamuthi Solar Power Project, multiple GW-scale projects across India
3. Tata Power Solar
- Type: Manufacturer + EPC + rooftop installer
- Capacity: 530 MW panel manufacturing + 2.8 GW project development
- Headquarters: Bangalore, Karnataka
- Products: Mono PERC panels, complete rooftop solutions
- Why choose: Trusted Tata brand name, strong rooftop solar division, end-to-end service (design → install → maintain), government project expertise
- Best for: Urban homeowners who want a well-known brand with local service
4. Vikram Solar
- Type: Solar panel manufacturer + EPC
- Capacity: 3.5 GW annual manufacturing
- Headquarters: Kolkata, West Bengal
- Products: Mono PERC, TOPCon, high-efficiency modules
- Why choose: Strong on high-efficiency products, good export track record (quality indicator), expanding rooftop division
- Note: Known for premium products, may be pricier than Waaree
5. RenewSys India
- Type: Solar panel manufacturer + raw materials
- Headquarters: Mumbai, Maharashtra
- Products: Modules, EVA encapsulants, backsheets
- Why choose: Unique — makes both panels AND raw materials. Strong domestic content compliance for government projects.
Top Solar EPC & Installer Companies in India
6. Nexus Power (and other regional EPC leaders)
India's residential solar market is served by thousands of regional EPC companies — local firms that buy panels from manufacturers and install complete systems. The best regional installers often outperform large national brands on service and price. Look for:
- MNRE-empanelled installer status
- 3+ years in business
- Positive Google/Justdial reviews
- Local office (not just a WhatsApp number)
7. NTPC Renewable Energy (Government)
- Type: Government power company (utility-scale solar)
- Capacity: 3.6 GW operational solar + 60 GW target by 2032
- Headquarters: Delhi
- Why relevant for you: NTPC runs the PM Surya Ghar portal and assigns empanelled installers for subsidy-linked rooftop solar. Many residential installations are through NTPC's empanelled vendor network.
8. Rays Power Experts
- Type: EPC company specialising in commercial & industrial (C&I) solar
- Headquarters: Delhi
- Why choose: Strong track record in large commercial rooftop projects, 500+ MW installed, competitive on pricing for business customers
9. CleanMax Solar
- Type: EPC + solar-as-a-service (OPEX model)
- Headquarters: Mumbai
- Why choose: Popular with large businesses — OPEX model means zero upfront cost (pay per unit generated). Served over 600 commercial clients including Godrej, Marico, Mahindra.
- Best for: Businesses wanting solar without capital expenditure
10. Fourth Partner Energy
- Type: Distributed solar developer + EPC
- Headquarters: Hyderabad
- Why choose: 1 GW+ rooftop solar installed across 18 states, strong in C&I, good project management track record
Top International Solar Brands Active in India
| Brand | Country | India Presence | Known For |
|---|---|---|---|
| LONGi Solar | China | Strong — import + manufacturing JV | World's largest mono panel maker, 30-yr warranty |
| Jinko Solar | China | Strong — large importer | Most panels shipped globally, consistent Tier-1 |
| Trina Solar | China | Strong importer | Good quality:price, Vertex series popular in India |
| Canadian Solar | Canada/China | Good Indian distribution | Reliable brand, strong warranty |
| REC Group | Norway | Limited but premium | Best-in-class product warranty (20 years) |
| SMA Solar | Germany | Good — via distributors | Premium inverters, not panels |
How to Choose a Solar Company for Your Home
For residential solar in India, the most important factors are:
- Local installation quality — The installer's workmanship matters more than the brand. A poorly installed Waaree system will underperform a well-installed no-name system.
- After-sales service — Can they send a technician within 48 hours? Do they have local staff?
- MNRE empanelment — Required for PM Surya Ghar subsidy. Always verify at pmsuryaghar.gov.in.
- Panel warranty backing — Is the manufacturer's India warranty actually enforced? Indian-headquartered companies (Waaree, Adani, Tata) are safer for long-term warranty claims.
- No advance payment pressure — Legitimate installers take 20–30% advance, balance on completion. Full advance requests are a red flag.
Beware of Solar Scams in India
With India's solar boom, fraudulent solar companies have multiplied. Red flags:
- Offering "free solar panels" from government schemes (there is no free panel scheme — only subsidies on your purchase)
- Asking for full payment before any work starts
- No physical office — only WhatsApp or phone number
- No MNRE empanelment or state renewable energy department registration
- Prices far below market rate (below ₹35/W for installed system is a red flag)
- Promising "no electricity bill forever" without a written system design
Use GoSolarIndex to find verified, review-backed solar installers in your city.