Ten years ago, solar in India sat on the margins of the power sector. Panels were mostly imported, projects depended heavily on global supply chains, and coal still felt unshakable at the center of the system.
Today, the picture looks very different.
- India has scaled its solar module manufacturing capacity from about 3 GW to 172 GW per year in a single decade, putting it among the largest solar manufacturing bases in the world.
- Installed solar power capacity has crossed roughly 143–144 GW by early 2026 and continues to climb, making solar the backbone of India’s renewable capacity additions.
- Rooftop solar is no longer a niche. Under the PM Surya Ghar Muft Bijli Yojana, close to 10,000 rooftop systems are being installed every day, with millions of homes already covered.
What started as a climate and energy security story is now just as much an industrial and manufacturing story. The question for investors is simple: is this just a good policy moment, or a genuine long term theme worth allocating to?
Let us break it down.
From 3 GW To 172 GW: How India Built A Solar Manufacturing Powerhouse
The headline number is startling. In about ten years:
- Solar module manufacturing capacity in India has gone from around 3 GW to 172 GW.
- Domestic solar cell manufacturing has reached about 27 GW, up sharply in just a few years.
A few things made this possible:
- Strong policy push
- Production Linked Incentive (PLI) schemes for high efficiency modules
- Customs duty on imported modules and cells to encourage local production
- The Approved List of Models and Manufacturers (ALMM), which nudges utility scale projects towards Indian made modules
- Visible long term demand
- Scale economics
This is not just nameplate capacity on paper. A growing share is already part of the ALMM list and is shipping to projects across states.
Solar On The Ground: 144 GW And Counting
Manufacturing without deployment would be an empty story. On the ground, solar is now a central part of India’s power mix.
- By February 2026, India’s installed solar PV capacity was around 143.6 GW, including utility scale projects, rooftop plants, hybrids and off grid systems.
- Solar now contributes more than two thirds of India’s non hydro renewable capacity, and renewables together account for over 40 percent of total power capacity.
Within solar:
- Ground mounted utility projects dominate with more than 109 GW.
- Rooftop solar has reached around 25 GW, driven by households, commercial buildings and industry.
In other words, the jump in manufacturing capacity is feeding directly into real projects and real electrons on the grid.
Rooftop Solar: PM Surya Ghar Changes The Game
One of the most interesting shifts is on rooftops.
The PM Surya Ghar Muft Bijli Yojana is targeting one crore households with rooftop systems that can provide up to 300 units of free electricity per month. As of late 2025:
- Almost 24 lakh households had already installed rooftop solar under the scheme.
- Applications and installations have been accelerating, with lakhs of systems being commissioned each year.
Recent reporting now suggests that under this and related initiatives:
- Roughly 10,000 new rooftop systems are being installed every single day, and
- Around 40 lakh rooftop installations have been completed in total, making rooftop solar a serious pillar of capacity, not just pilot scale.
For investors, this matters because rooftop economics are quite different from large solar parks. They create opportunities in:
- Residential and commercial EPC (engineering, procurement and construction)
- Inverters, mounting structures and rooftop specific components
- Financing and aggregation platforms that can bundle rooftop projects into investable pools
India’s Energy Demand: Why The Solar Push Will Not Slow Easily
India’s economy continues to expand, and so does its appetite for energy.
According to the government’s Energy Statistics India 2025:
- Total Primary Energy Supply (TPES) reached about 903,158 KToe in FY 2023-24, up nearly 8 percent from earlier years.
- Coal still supplies around 60 percent of primary energy, crude oil close to 30 percent, and gas just under 7 percent.
On the consumption side:
- Total Final Consumption (TFC) in FY 2023-24 was 6,13,605 KToe, about 38 percent higher than in FY 2014-15, reflecting a decade of rapid growth.
Renewables are growing from a small base but at a strong clip:
- Renewable energy supply rose from 17,682 KToe in FY 2014-15 to 31,847 KToe in FY 2023-24, almost doubling in ten years.
In simple terms:
- India’s energy demand is not flattening.
- Coal and oil will not disappear overnight.
- But renewables, led by solar, are gaining a larger and larger share of incremental capacity.
This keeps the demand side of the solar story intact for many years.
How Big Is The Renewable Potential From Here?
Potential tells you if the runway is long or short.
The same Energy Statistics India data pegs India’s renewable energy potential at about 2,109,655 MW as of March 2024.
Breakup:
- Wind: 1,163,856 MW, about 55 percent of the potential
- Solar: 748,990 MW, around 36 percent
- Large hydro: 133,410 MW, about 6 percent
More than half of this potential is still untapped.
Solar’s ~7.5 lakh MW potential compared with today’s ~144 GW of installed capacity shows that India is still early in the game.
Policy Support And The Manufacturing Ecosystem
The government has used several levers to encourage domestic manufacturing and reduce import dependence.
ALMM and state manufacturing clusters
Under the Approved List of Models and Manufacturers (ALMM):
- Only modules from empanelled manufacturers can be used in certain categories of projects, especially government linked and utility scale ones.
As of March 2026, ALMM based reports show:
- Around 1,72,592 MW of solar module manufacturing capacity registered across 17 states, with large clusters in:
- Gujarat (about 80 GW)
- Rajasthan
- Tamil Nadu
- Maharashtra
- Haryana
Exact splits vary by source, but these states are consistently flagged as top module hubs.
Domestic content requirement from June 2026
A major structural change is coming:
- From 1 June 2026, all solar energy projects in India, government or private, will be required to use cells manufactured within the country, as per an approved list of solar cell makers.
This builds on earlier rules that:
- Already pushed projects to use Indian made modules through ALMM.
- Will now extend that discipline to cells, not just assembled panels.
The Ministry of New and Renewable Energy is targeting about 42 GW of domestic solar cell manufacturing capacity by 2026, up from roughly 27 GW today.
The idea is to:
- Guard against global supply chain shocks
- Curb dependence on Chinese cells and wafers
- Create a deeper domestic value chain from polysilicon and wafers up to finished modules
For investors, this is important because it can:
- Improve revenue visibility for cell, wafer and integrated manufacturers
- Change the cost curves between import heavy and local heavy business models
- Create winners among those who move early on vertically integrated capacity
Why This Matters For Investors
India’s solar story is not just about megawatts and gigawatts. It opens multiple investable sub themes.
1. Module and cell manufacturers
Companies involved in:
- High efficiency cell lines (TOPCon, HJT)
- Large scale module assembly
- Fully integrated facilities covering ingots, wafers, cells and modules
stand to benefit from:
- Domestic content mandates from June 2026 onward
- PLI incentives and long order books from developers who want ALMM compliant supply
Risks to monitor:
- Overcapacity in modules if demand falls short of aggressive build out plans
- Global price competition, especially if China cuts prices to defend exports
2. EPC and project developers
Engineering, procurement and construction (EPC) companies and independent power producers (IPPs) get leverage to:
- India’s rising energy demand
- State and central tenders for utility scale and hybrid projects
- Rooftop and C&I (commercial and industrial) solar growth
Those with:
- Strong execution records
- Stable balance sheets
- Good land and grid access
are better positioned to win and execute large orders.
3. Rooftop and distributed solar players
The combination of PM Surya Ghar and rising awareness can create a long runway for:
- Residential rooftop specialists
- C&I rooftop and open access developers
- Fintech and platform businesses that simplify small ticket rooftop financing
Here, brand trust, installation quality and after sales service are as important as module specs.
4. Ancillary suppliers and enablers
There are also quieter but interesting areas:
- Inverters and balance of system components
- Mounting structures, trackers and cabling
- Software for monitoring, forecasting and grid integration
- Storage players that will increasingly pair with solar to provide round the clock power
These may not always be pure listed plays yet, but they are important parts of the ecosystem.
What Could Go Wrong?
No theme is risk free.
Some key risks to keep in mind:
- Policy and tariff risk
- Delays or changes in ALMM, PLI timelines, duties or tender rules can affect project economics.
- Grid and integration constraints
- High solar penetration in some states can lead to curtailment or the need for significant grid upgrades.
- Financing and counterparty risk
- Developers may face challenges if discom health or payment discipline does not improve.
- Global price cycles
- Oversupply in global modules or cells could hurt domestic manufacturers if they cannot compete on cost, even with policy support.
For investors, this means treating solar as a long term structural theme with cyclical phases, not as a straight line story.
What Comes Next?
Looking ahead, the direction of travel is clear.
- India aims to keep expanding clean energy capacity to strengthen energy security and meet climate goals.
- The move from 3 GW to 172 GW of solar module manufacturing shows that industrial capability is catching up with ambition.
- By mandating domestically manufactured cells from June 2026 and targeting 42 GW of cell capacity, the government is pushing the industry up the value chain.
If these trends hold, India’s solar manufacturing sector will not just be about replacing imported panels. It will be:
- A meaningful source of jobs and capex
- A driver of technology adoption and innovation
- A possible export story over the next decade as global buyers diversify suppliers
For investors, the key is to:
- Focus on balance sheets and execution, not just narratives
- Diversify across parts of the value chain where possible
- Accept that there will be policy noise and price cycles along the way
The numbers already tell you this is no longer a side show. In a little over ten years, India’s solar journey has gone from a few gigawatts to a serious industrial pillar. The next ten years will decide which companies turn that national story into long term shareholder value.
Disclaimer
This article is for informational and educational purposes only and does not constitute investment, tax or legal advice. Capacity, policy and energy data referenced here draw on public sources such as Energy Statistics India 2025, official press releases, and industry reporting on India’s solar manufacturing and deployment, including recent coverage of the 3 GW to 172 GW module manufacturing expansion, installed solar capacity above 140 GW, renewable energy potential estimates, and domestic content requirements from June 2026.
Actual outcomes for companies and projects can differ from historical trends and projections. Investing in renewable energy and related sectors involves market, regulatory and technology risks. Before making any investment decision, you should carefully consider your financial situation, risk tolerance and objectives, and consult a SEBI registered investment adviser or other qualified professional.
