Ministry of New and Renewable Energy Secretary Santosh Kumar Sarangi said on 21 August 2026 that India is targeting at least 30 GW of polysilicon manufacturing capacity addition by 2030.
A polysilicon plant together with metallurgical-grade silicon needs an investment of roughly Rs 850 crore per GW, putting the capital requirement for 30 GW at about Rs 25,000 crore.
The government will design a separate support mechanism for polysilicon because the capacity likely under the existing PLI scheme would be limited; the subsidy amount is still being worked out.
Polysilicon is the first link in the solar value chain - it is melted into ingots, sliced into wafers, and processed into cells and modules - and India's domestic capacity of roughly 2 GW is the weakest point in that chain.
India imports the bulk of its polysilicon, and global solar-grade polysilicon output is heavily concentrated in China, making the gap an energy-security question rather than only a cost one.
Polysilicon is very high-purity silicon made up of many small silicon crystals fused together in random orientation, produced by purifying metallurgical-grade silicon. Two routes dominate commercial production: the Siemens process, in which purified silicon is deposited from gas onto heated rods, and fluidized bed reactor (FBR) technology. Because it delivers almost as much energy output as single-crystal silicon at lower cost, polysilicon is the base feedstock of the solar industry: it is melted into ingots, the ingots are sliced into wafers, and the wafers are processed into cells and then modules. The same material is also used in semiconductor fabrication for integrated circuits.
Simple Analogy: In the solar value chain polysilicon is the flour. India has built a very large bakery - module capacity - and a growing mill for wafers and cells, but still buys almost all its flour from abroad.
Build gigawatt-scale integrated solar PV manufacturing in India, from polysilicon down to modules.
Key: Total outlay Rs 24,000 crore; Tranche I of Rs 4,500 crore and Tranche II of Rs 19,500 crore, with incentives weighted towards higher degrees of backward integration.
Restrict government-supported and grid-connected solar projects to modules and cells from listed domestic manufacturers.
Key: Administered by MNRE; ALMM List-II extends the listing requirement from modules to solar cells with effect from 1 June 2026, pushing demand one step further upstream.
Create at least 30 GW of domestic polysilicon capacity by 2030 where the PLI route alone was expected to deliver little.
Key: A separate mechanism outside the existing PLI, with the subsidy amount still under formulation as of August 2026.
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Silicon of roughly 98-99% purity produced by reducing quartz with carbon. It is the raw input that is purified further to make solar-grade polysilicon.
The dominant polysilicon route, in which high-purity silicon is deposited from a silicon-bearing gas onto heated silicon rods inside a reactor.
An alternative polysilicon process in which silicon is deposited on seed particles suspended in an upward gas flow; less energy-intensive than the Siemens process.
Approved List of Models and Manufacturers - the MNRE list of solar modules and, from 1 June 2026 under List-II, cells that are eligible for use in government-supported projects.
Polysilicon is melted and cast or grown into a solid block called an ingot, which is then sliced into thin wafers that become solar cells.