Module Growth Outpaces Core Materials

India's solar manufacturing expansion is achieving impressive scale in module assembly. However, this growth is critically constrained by a weak upstream segment. The nation's formidable module production capacity risks becoming a hollow victory if it remains tied to foreign suppliers for essential raw materials like polysilicon and wafers.

India's Ambitious Capacity Targets and Upstream Gap

India aims to be a global leader in solar module production, with capacity projected to exceed 165 GW by 2027. By March 2025, solar cell manufacturing capacity is expected to reach approximately 25 GW, and module capacity was projected at 144 GW by the end of 2025. This rapid build-out, driven by government incentives like the Production Linked Incentive (PLI) scheme and domestic content requirements, far surpasses the country's annual domestic demand of roughly 40 GW. Yet, this impressive scale rests on a precarious foundation: India possesses virtually no domestic capacity for polysilicon or wafer manufacturing. This upstream deficit creates a significant cost disadvantage, adding at least $0.03/W to Indian-assembled modules using imported cells compared to fully imported Chinese modules. To bridge this gap, the industry has requested approximately ₹20,000-25,000 crore in viability gap funding for 50 GW of ingot and wafer capacity.

China's Dominance in Polysilicon and Wafers

China overwhelmingly dominates global polysilicon and wafer production. By the end of 2024, China accounted for over 93.5% of global polysilicon output, with its top four manufacturers—Tongwei, GCL Technology, Daqo New Energy, and Xinte Energy—holding a combined 65% market share. Globally, China's share of silicon wafer production exceeds 97%. While Germany's Wacker Chemie remains a significant player, it is the sole Western company among the top ten polysilicon producers. This concentration means nearly all critical upstream components for solar panels originate from a single nation, presenting substantial supply chain risks.

India's Upstream Lag

While India's module manufacturing capacity is set to surge, potentially creating domestic oversupply, its upstream capabilities remain nascent. This reliance on imports for polysilicon and wafers, where India has no significant presence, exposes the nation to global price volatility. For instance, polysilicon prices are forecast to rise by 40% between the second and fourth quarters of 2025, directly impacting module manufacturing costs. The narrowing price gap between Indian and Chinese TOPCon modules, from $0.09/W to $0.057/W between early 2024 and October 2025, shows progress but also highlights ongoing cost challenges.

Investment Hurdles and Technology Needs

Establishing indigenous polysilicon and wafer production requires cutting-edge technology, immense capital investment, and ultra-clean manufacturing environments. The energy-intensive nature of these processes further complicates matters, requiring access to cost-effective and clean power. The substantial capital needed and the established economies of scale enjoyed by Chinese competitors make it difficult for Indian firms to achieve cost competitiveness without significant, sustained policy support.

Global Demand and Supply Chain Risks

Global electricity demand is projected to grow robustly, with solar PV expected to meet roughly half of this growth through 2027. This burgeoning demand offers significant export opportunities for India. However, the concentration of manufacturing in China increases supply chain risks. Geopolitical tensions, trade restrictions, and the potential weaponization of supply chains pose a direct threat to energy security and India's net-zero targets. Any disruption in the supply of polysilicon or wafers could seriously hinder India's ambitious clean energy transition.

Risks: China's Leverage and Potential Overcapacity

India's current strength in solar module manufacturing is a fragile foundation built on imported components. Without an integrated domestic supply chain for polysilicon and wafers, the country risks remaining a 'screwdriver industry,' susceptible to external price shocks and geopolitical leverage. The immense scale and cost efficiencies of Chinese upstream producers create a formidable barrier, suggesting that achieving true cost competitiveness for Indian-made upstream components will require long-term, substantial subsidies, potentially leading to market distortions. China's near-monopoly in these critical materials presents a significant geopolitical risk; any disruption could undermine India's energy independence and its ability to meet climate goals. The rapid expansion of module capacity in India, outpacing domestic demand, also raises concerns about potential overcapacity and price competition, similar to recent trends in China.

Path Forward for India's Solar Sector

Analysts see India as having the clearest potential to emerge as a credible, large-scale alternative to China's solar supply chain dominance. However, achieving this vision requires more than just scaling capacity. Companies like Waaree Energies (market cap ~$8.24 billion) and Solar Industries India (market cap ~$14.92 billion USD) operate in a sector with premium valuations; Solar Industries India has a P/E ratio around 80-95x, reflecting strong investor optimism. Still, the fundamental challenge of upstream integration remains critical. Success will require strategic policy interventions that foster technological advancement, attract massive capital investment, and ensure long-term cost competitiveness. Without a concerted effort to build indigenous polysilicon and wafer capabilities, India's solar manufacturing strength may ultimately be limited by its upstream vulnerabilities.