Forty-five gigawatts. That’s how much solar capacity India bolted onto its grid in FY 2025-26 alone — a single-year jump that would have sounded like fantasy a decade ago. Total installed solar capacity has now crossed 100 GW, making India the world’s third-largest solar market, and behind that number sits a manufacturing boom few people outside the industry are tracking closely. The PM Surya Ghar Muft Bijli Yojana, the PLI scheme for solar PV manufacturing, and domestic content rules on government tenders have together pushed Indian module makers from bit-part suppliers to genuine global contenders. Here’s a look at the ten companies actually building the panels going up on Indian rooftops and solar parks right now.
1. Waaree Energies
No company casts a bigger shadow over Indian solar manufacturing than Waaree. Founded back in 1989 and now headquartered in Mumbai, it runs a 12 GW manufacturing operation split across Chikhli and Umbergaon in Gujarat’s Surat and Valsad districts — the largest module capacity of any Indian manufacturer, full stop. Annual revenue sits north of ₹26,500 crore. On the ALMM List I registry that determines which panels qualify for government subsidy schemes, Waaree’s listed capacity of nearly 12 GW is more than double its nearest domestic rival.
What Waaree has that smaller manufacturers don’t is reach — the dealer and installer network stretches into virtually every state, which is exactly why it’s the default stock item at most DISCOM-empanelled installers. If you’re buying solar in India in 2026, chances are somebody’s already quoted you a Waaree panel without you asking.
2. Adani Solar
Adani Solar plays a different game entirely: vertical integration, start to finish. Out of its Mundra SEZ facility in Gujarat, the company runs the full chain — ingots, wafers, cells, modules — currently at 4 GW of integrated cell and module capacity, with a public commitment to hit 10 GW by mid-2026. That’s a rare capability among Indian manufacturers, most of whom still import cells or wafers and assemble locally.
The bet Adani is making is that owning the entire supply chain, right down to polysilicon-adjacent processes, insulates it from the import shocks and ALMM-eligibility headaches that trip up assemblers. For utility-scale developers signing multi-hundred-megawatt power purchase agreements, that kind of self-sufficiency carries real weight at the negotiating table.
3. Tata Power Solar
Tata Power Solar doesn’t need to shout. Operating out of Bengaluru with over three decades of history dating to 1989, it’s built its reputation the old-fashioned way — reliability over hype. Manufacturing capacity sits at roughly 1.8 GW, modest next to Waaree or Goldi, but the Tata name carries a trust premium that shows up disproportionately in residential and small commercial rooftop decisions, where buyers are choosing a brand for their own home, not just a spec sheet.
That’s really the company’s niche: homeowners and small businesses who’d rather pay slightly more for a name they already trust from Tata’s other businesses than chase the cheapest per-watt number on the market.
4. Vikram Solar
Kolkata’s Vikram Solar has quietly built one of the more internationally credible manufacturing operations in the country. It ships to 39 countries, holds 2.6 GW of ALMM-listed capacity, and has been rated a “Top Performer” by PVEL for seven consecutive years — a distinction almost no other Indian manufacturer can claim. A 1 GW supply contract with JSW Neo Energy underlines the kind of utility-scale trust the company has earned domestically as well.
Vikram’s product range spans mono-PERC, bifacial, TOPCon, and HJT technologies, giving it flexibility across both export markets with stricter certification demands and the Indian utility segment, which increasingly wants the latest cell technology at competitive pricing.
5. Premier Energies
Premier Energies, headquartered in Hyderabad, is the company most people in the industry point to when they talk about genuine backward integration outside the Adani-Waaree tier. It runs 3.2 GW of cell capacity and 6 GW of module capacity, with plans to scale to 10-11 GW by FY 2027, and listed on Indian stock exchanges in 2024 to fund exactly that expansion. Orders worth over ₹2,700 crore for more than 2,000 MW of combined cells and modules give a sense of the scale it now operates at.
Premier’s pitch to utility-scale developers and government procurement programmes is technical self-sufficiency — the ability to supply complete cell-to-module production without leaning on imported cells, which matters enormously under India’s domestic content rules.
6. Goldi Solar
Few manufacturers anywhere have scaled as fast as Goldi Solar. Founded in Surat in 2011, the company expanded from 3 GW to 14.7 GW of capacity within a single year — a growth curve that’s hard to find a parallel for in Indian manufacturing history, solar or otherwise. It now exports to multiple international markets alongside serving India’s booming utility and rooftop segments.
The company runs on Mono PERC and N-type TOPCon lines and has increasingly moved into its own cell production, a step that fewer than a handful of Indian module makers have managed at meaningful scale.
7. Saatvik Green Energy
Saatvik, operating out of Haryana as Saatvik Solar, has built 4.8 GW of operational module capacity while also branching into solar cells, inverters, and full EPC services — a broader footprint than most manufacturers its size attempt. Its product line covers MonoPERC, Bifacial, and N-TopCon technologies, aimed squarely at rooftop, ground-mounted, and floating solar installations.
That floating solar piece is worth noting specifically — it’s a smaller but fast-growing segment in India given land constraints near major cities, and Saatvik is one of the few manufacturers actively positioning products for it rather than treating it as an afterthought.
8. Rayzon Solar
Rayzon is the newest name on this list by founding date — established only in 2017 out of Surat — yet it’s already built an 11.3 GW production capacity and genuine export operations across the United States, Canada, the Middle East, and South Africa. That combination of youth and scale makes it something of an outlier among Indian solar manufacturers, most of whom took decades to reach comparable numbers.
For international buyers specifically, Rayzon’s growth trajectory has made it a go-to reference point for what a fast-scaling, technology-forward Indian manufacturer looks like without the multi-decade legacy of a Tata or Waaree behind it.
9. RenewSys
RenewSys occupies a slightly different corner of the market — it’s one of India’s few manufacturers with genuine depth across the full component stack, including solar cells, modules, and the encapsulants and backsheets that go into every panel regardless of brand. That backward reach into materials, rather than just final assembly, gives it a supply-chain resilience that pure module assemblers lack.
It’s consistently named alongside Waaree, Adani, and Tata Power Solar in utility-scale and industrial procurement shortlists, particularly by buyers who want a manufacturer less exposed to import disruptions on raw materials.
10. Loom Solar
Loom Solar tells a different kind of story — two brothers, Amol and Amod Anand, starting out of Faridabad, Haryana, in 2018, and building a partnership with Enphase Energy in the US along the way. Manufacturing capacity is comparatively modest at around 300 MW, but the company has carved out a distinct niche by pairing bifacial and N-Type TOPCon modules with its own lithium battery and inverter lines — a full home energy package rather than panels alone.
That bundled approach has made Loom Solar particularly popular with residential customers assembling a complete rooftop-plus-storage system, who’d rather buy panels, batteries, and inverters from one manufacturer than stitch together three separate warranties.
Frequently Asked Questions
Q1. Which company has the largest solar panel manufacturing capacity in India?
A: Waaree Energies holds the largest capacity among Indian solar panel manufacturers, running approximately 12 GW out of its Gujarat facilities in Chikhli and Umbergaon. On the government’s ALMM List I registry specifically, Waaree’s listed capacity of nearly 12 GW is more than double that of Adani Solar, its closest rival by that measure.
Q2. What does ALMM mean, and why does it matter when choosing a solar panel manufacturer?
A: ALMM, or the Approved List of Models and Manufacturers, is the Ministry of New and Renewable Energy’s registry of solar equipment eligible for government-subsidised projects, including the PM Surya Ghar scheme. If a panel model isn’t on ALMM List I at the time of commissioning, the subsidy claim gets rejected during DISCOM inspection, so it’s worth verifying ALMM status for the exact model number at order time rather than assuming brand-level eligibility.
Q3. Which solar panel technology should buyers prioritise in 2026 — Mono PERC or N-Type TOPCon?
A: N-Type TOPCon has become the dominant technology among top manufacturers in 2026, fitting more wattage into the same panel footprint, generating more lifetime energy, and losing less output on hot Indian afternoons compared to older Mono PERC panels. The price gap between the two has narrowed significantly, so TOPCon is generally the better pick unless a Mono PERC quote is meaningfully cheaper and roof space isn’t a constraint.
Q4. Are Indian-manufactured solar panels genuinely comparable in quality to international brands?
A: Yes — most top Indian manufacturers now hold BIS, IEC, and often UL certifications, and companies like Vikram Solar have earned independent recognition such as PVEL’s “Top Performer” rating for multiple consecutive years. Indian panels have closed much of the quality gap with global brands while also complying more easily with domestic subsidy and content requirements, making them the practical default for most buyers in India.
Q5. What’s driving the rapid growth in India’s solar manufacturing capacity?
A: A combination of government policy and falling costs is behind the surge: the PLI scheme for solar PV manufacturing, domestic content requirements on government solar tenders, and the PM Surya Ghar rooftop subsidy programme have all pushed demand toward domestic manufacturers specifically. India’s cumulative module manufacturing capacity reached roughly 210 GW by December 2025, growing by about 119 GW in that year alone, as manufacturers raced to meet both booming domestic demand and a rapidly expanding solar export market.