The Centre’s proposed incentive scheme for domestic polysilicon manufacturing signals a significant change in India’s solar strategy: the country is no longer focusing only on assembling finished panels, but is attempting to build the industrial chain that begins with the raw material and runs through ingots, wafers, cells and modules. That shift matters because India’s rapidly expanding module and cell capacity still rests on a major upstream dependence on imports, particularly from China.
According to the Ministry of New and Renewable Energy information cited in the report, India has more than 213 GW of solar module manufacturing capacity and around 32 GW of cell capacity. Polysilicon, however, remains a missing link. The material is converted into ingots and wafers, which then become inputs for solar cells and, eventually, solar modules. Without domestic capacity at this stage, the apparent scale of downstream manufacturing does not amount to a fully integrated supply chain.
The proposed policy is therefore not simply another production target. It is an attempt to address the structure of India’s solar manufacturing base. The country has built substantial capacity at the end of the chain, but upstream manufacturing requires different capital, technology, energy and operational capabilities. The policy question is whether government support can make that part of the chain commercially viable without creating capacity that remains dependent on protection or subsidies.
The Centre is considering an incentive scheme modelled on production-linked incentives. The final structure, incentive rates and eligibility conditions have not yet been announced. An initial proposal discussed support for more than 10 GW of polysilicon capacity. A later proposal indicated a possible target of at least 30 GW by 2030. The change in scale shows that the government is considering polysilicon as a strategic industrial capability rather than a small supplementary segment of the solar sector.
That ambition has to be read alongside India’s other upstream target. The government is aiming for at least 80 GW of domestic ingot and wafer manufacturing capacity by June 2028. Taken together, the proposed polysilicon capacity and the ingot-and-wafer target describe an effort to create continuity across the production chain. The objective is not merely to increase the number of panels made in India, but to ensure that the inputs required to make those panels are also available within the country.
The industrial logic is straightforward. Heavy reliance on an overseas source for polysilicon exposes manufacturers to supply disruptions and sharp price changes. The report identifies China as the dominant source of India’s polysilicon imports. Domestic production could reduce that exposure and give Indian manufacturers greater control over a crucial input. It could also make the country’s solar manufacturing ecosystem more resilient if international supply conditions change.
But resilience is not the same as competitiveness. MNRE Secretary Santosh Kumar Sarangi said establishing polysilicon plants along with metallurgical-grade silicon could require investment of around Rs 850 crore per GW. At the possible 30 GW scale, the capital requirement would be substantial, although the report does not establish the total investment needed for the full programme or explain how much would be borne by the government and how much by private companies.
That distinction is important because polysilicon is an energy-intensive and technically demanding part of solar manufacturing. The supplied report does not provide a detailed assessment of energy requirements, production costs or the proposed subsidy mechanism. It does, however, indicate the scale of the challenge: domestic manufacturing cannot be created simply by announcing capacity. Plants will need access to capital, reliable energy procurement, appropriate technology and operating expertise.
Vinay Thadani, Director and CEO of GREW Solar, described modules and cells as areas where India has made progress, while identifying polysilicon and wafers as the distinct gap in the value chain. He welcomed the proposed scheme but cautioned that domestic manufacturing should not focus only on import reduction. In his assessment, long-term cost effectiveness would depend on scale, technology, operational effectiveness and competitive energy procurement.
That response points to the central tension in the policy. Import substitution can be an immediate industrial objective, but it cannot by itself guarantee that Indian-made polysilicon, wafers or ingots will be cost-competitive. If domestic capacity is expensive to operate, manufacturers may require continuing support or protection. If it is built at scale with efficient technology and competitive energy, it could become a durable part of the solar economy. The report establishes this policy concern but does not yet provide the final scheme details needed to judge the likely outcome.
The government’s proposed production-linked incentive approach also raises questions about how success will be measured. The report does not specify whether support will be linked only to installed capacity, actual production, efficiency, sales, domestic value addition or other performance conditions. Those design choices will determine whether the scheme produces operational factories or mainly announced projects. Eligibility rules will similarly decide which companies can participate and how concentrated the new manufacturing base becomes.
The capacity figures illustrate why the upstream gap matters. More than 213 GW of module manufacturing capacity indicates that India has built considerable ability to produce the final solar component. Around 32 GW of cell capacity shows progress one stage earlier in the chain, although it is much smaller than the reported module capacity. The difference between these figures and the absence of a comparable domestic polysilicon base suggest that capacity has developed unevenly, with downstream manufacturing moving faster than upstream production.
This unevenness has consequences beyond the solar-manufacturing sector. Solar modules are part of India’s wider renewable-energy build-out, so the cost and reliability of their inputs can affect the economics of future installations. The supplied material does not provide generation targets, tariff data or project-level cost estimates, and it would be premature to quantify the effect of the proposed scheme on electricity prices. The more immediate conclusion is narrower: the government is treating supply-chain security as an important condition for expanding domestic solar manufacturing.
GREW Solar is planning to establish 8 GW of ingot and wafer manufacturing capacity, according to Thadani. That plan provides an example of how private investment could fit into the proposed industrial chain, although the report does not state its location, construction timeline, financing structure or commissioning status. It also does not establish whether the planned capacity is contingent on the proposed government incentives.
The institutional responsibility is currently concentrated with the Centre, through the Ministry of New and Renewable Energy. The ministry is working on the incentive scheme, while the final structure remains pending. Private manufacturers will determine whether the policy produces operating capacity, but their decisions will depend on the terms eventually offered. This makes the forthcoming scheme more consequential than the headline target alone: the administrative design will shape the investment response.
India’s polysilicon push is thus best understood as a test of whether industrial policy can move the solar sector from downstream scale to full-chain capability. The government has identified a strategic vulnerability and is considering support at a substantially larger scale than the initial proposal. The evidence currently confirms the size of the existing module and cell base, the country’s dependence on imported polysilicon, the proposed capacity targets and the investment challenge.
What remains uncertain is equally important. The final incentive rates, eligibility rules, implementation schedule and funding structure have not been announced. The report also does not establish how domestic polysilicon would compare with imported material on cost or quality, or how quickly the proposed capacity could become operational. Those details will determine whether the policy delivers a resilient and competitive manufacturing chain or merely expands announced capacity. The next significant milestone will be the Centre’s formal announcement of the scheme and its conditions.
