India Won the Solar Race. Now Comes the Silicon Challenge

There is a moment in every industrial revolution when a country stops consuming technology and starts making it. For India's clean energy sector, that moment may have arrived quietly over the past few months.

In 2025-26, the country added a record 44.6 GW of solar capacity, nearly double the previous year's total and enough to overtake the United States as the world's second-largest annual solar market. Yet, beneath that success lies an uncomfortable reality: the silicon wafers at the heart of most of those panels still come from China.

Waaree Energies broke ground on a ₹62 billion integrated ingot and wafer facility in Nagpur. Its board approved a broader ₹100 billion fundraise to support expansion. At the same time, the government has allowed the ALMM List-II domestic cell mandate to take effect without granting a blanket extension.

Taken together, these developments are more than routine corporate announcements and policy decisions. They represent India's most serious attempt yet to build a complete solar manufacturing ecosystem.

KEY FIGURES

Missing Link
India has excelled at the final stages of the solar value chain. It installs panels at scale and has built module manufacturing capacity of more than 200 GW. Upstream manufacturing, however, remains weak. Domestic cell capacity is only a fraction of module capacity, while commercial wafer production has barely existed.

That matters because wafers sit at the foundation of the solar supply chain. China recognised this two decades ago and steadily moved from assembling panels to producing cells, wafers and eventually polysilicon. Today, it dominates nearly the entire global wafer market and most cell production.

India's dependence is, therefore, not merely a trade issue. It is a strategic vulnerability. A supply disruption, export restriction or geopolitical shock could ripple through the country's clean energy ambitions.

The significance of Waaree's Nagpur project lies in its place within this value chain. A 10 GW ingot and wafer facility is not simply another capacity addition. It is an attempt to manufacture one of the industry's most critical components domestically. Tata Power Solar and others are pursuing similar plans, suggesting the industry has finally identified where the real gap lies.

Policy Push
The government's approach is becoming more coherent. Earlier manufacturing initiatives often struggled because incentives arrived before meaningful demand. This time, the market already exists.

India has more than 150 GW of installed solar capacity and a target of 500 GW of non-fossil fuel capacity by 2030. Rooftop adoption is accelerating under the PM Surya Ghar scheme, while utility-scale demand remains robust. Policymakers are now trying to use that demand to pull manufacturing further upstream.

The ALMM framework reflects this strategy. Modules came first. Cells are now mandatory for several project categories. Ingots and wafers are scheduled to follow in 2028 once sufficient domestic capacity is established.

The transition will not be painless. The six manufacturers currently on ALMM List-II — including Premier Energies, Adani Solar subsidiaries, Reliance Industries (which added HJT cell capacity in April 2026), Emmvee, ReNew PV, and c — effectively control what can be legally sourced for affected projects. Domestic cell manufacturing capacity remains below annual demand, while locally produced cells cost more than imported alternatives.

For commercial and industrial developers, that gap matters. ICRA estimates that modules made with domestic cells cost 3–4 cents per watt more than those using imported cells. Developers warn this could translate into tariff increases of 30–40 paise per unit. In an industry where projects are won on fractions of a rupee, those costs are significant.

Yet, delaying indigenisation carries costs of its own. The longer India relies on imported cells and wafers, the harder it becomes to build competitive domestic manufacturing.

Affordability remains a legitimate concern, but the picture is more nuanced. A June 2026 survey by the Council on Energy, Environment and Water covering more than 17,000 households found that 73% of respondents who viewed rooftop solar as expensive were unaware of the financing options already available to them. The study suggested that closing this awareness gap alone could unlock potential demand of 22.7 GW.

For now, subsidies continue to cushion residential consumers, while increasing scale should gradually narrow the cost gap between domestic and imported components. The bigger challenge is ensuring manufacturing capacity expands quickly enough to meet demand before wafer localisation requirements take effect in 2028.

The next two years will be critical. Policymakers are betting that investment will keep pace with demand and that manufacturers can scale rapidly enough to avoid prolonged supply constraints.

India has already proved it can build one of the world's largest solar markets. The harder challenge is building the industrial ecosystem beneath it.

Some costs will rise and some projects may slow. But dependence carries a cost too. A country that plans to anchor its energy future in solar cannot remain reliant on a single foreign supplier for its most critical components.

The next phase of India's solar journey will not be defined by how many panels it installs. It will be defined by whether it can manufacture the silicon that powers them. If it succeeds, this period may be remembered as the moment India's solar story became an industrial one.