05 October 2026
India has roughly 262 GW of solar module capacity and only about 37 GW of cell capacity. That gap explains almost everything about who makes money in Indian solar manufacturing today, and it should shape any decision about what kind of plant to build.
This guide covers what a solar panel manufacturing plant costs in India in 2026: module assembly versus cell production, what the money buys, the approvals and timelines, what government support actually pays out, and the operating margins that decide whether the plant works as a business. We build modules ourselves in Rajkot, so the practical detail here comes from running a line rather than from a project report.
A solar panel manufacturing plant cost in India in 2026 depends entirely on which part of the chain you build. A module assembly line runs roughly Rs 80 to 90 crore per GW and can be producing in 12 to 18 months. A TOPCon solar cell plant costs around Rs 470 crore per GW, on the evidence of Premier Energies' 7 GW facility built for Rs 3,293 crore, and takes two to three years. A fully integrated silicon-to-module project runs into thousands of crores per GW.
The harder question is margin. Module-only manufacturers reported EBITDA margins near 18% in mid-2026 and falling, while integrated cell and module makers reported around 30%. With Indian module capacity running at only 35 to 40% utilisation, order visibility matters more than capacity.
| Type of plant | Indicative capex per GW | What it does |
|---|---|---|
| Module assembly line | Roughly Rs 80 to 90 crore | Turns bought-in cells into finished panels |
| Solar cell plant (TOPCon) | Roughly Rs 450 to 600 crore | Turns wafers into cells |
| Fully integrated, silicon to module | Upwards of Rs 3,000 crore | Polysilicon, ingot, wafer, cell and module |
The cell figure is not an estimate. In September 2026 Premier Energies commissioned a 7 GW n-type TOPCon cell plant at Naidupeta, Andhra Pradesh, at a stated capex of Rs 3,293 crore across 40 hectares. That works out to about Rs 470 crore per GW, and it is the best public benchmark available in India right now.
A module line is roughly a fifth to an eighth of that per GW. This is why India built so much module capacity so quickly, and so little cell capacity.
A modern automated module line is a sequence of machines, each of which can be bought at different levels of automation and speed.
Beyond machinery you are paying for the building and land, power supply and backup, material handling, warehousing for glass and cells, and working capital, which is usually underestimated. Cells, glass, encapsulant, backsheet, frames and junction boxes all have to be paid for before a single module ships.
Our walkthrough of how solar panels are manufactured follows the same sequence from the production floor.
Cell manufacturing is semiconductor work. Wafers go through texturing, diffusion, deposition, passivation, screen printing and firing, in a controlled environment with high-purity chemicals, specialised gas handling and water treatment. Premier's new plant runs zero liquid discharge, which is now expected of a modern fab.
Technology choice moves the number. Industry estimates put a TOPCon cell line at about USD 40 million per GW against roughly USD 70 million per GW for HJT, which is a large part of why Indian manufacturers standardised on TOPCon rather than HJT.
Indian cell capex also runs higher than Chinese capex for the same output, commonly cited at close to double, because lines here are smaller and the supporting supply chain is thinner. Our guide to solar cell manufacturing in India covers the process in detail.
The PLI scheme. Tranche I committed Rs 4,500 crore. Tranche II, approved in September 2022, committed Rs 19,500 crore and allocated 39,600 MW of integrated capacity to 11 companies including Reliance, Waaree, Avaada, ReNew, JSW, Tata Power Solar, First Solar, Vikram Solar, Indosol, Grew and AMPIN.
The important detail for anyone modelling a new plant: PLI incentives are paid only after a full year of post-commissioning operation, and trade press reported in early 2026 that disbursal was still effectively zero because projects had not cleared that eligibility bar. Treat PLI as an upside case in year four or five, never as project funding.
Import duties. The 2025-26 Budget restructured duties on cells and modules. Headline basic customs duty came down, but additional levies went up alongside it, so the effective burden on imported modules remains around 40%, and on cells around 27.5%. Check current rates against the CBIC tariff before building a landed-cost model.
ALMM. Not a subsidy, but the single biggest demand driver for domestic manufacturing. List-I covers modules and List-II covers cells, and since June 2026 covered projects need modules built with List-II cells. That rule is what makes domestic cell capacity valuable.
State industrial policy. Gujarat, Tamil Nadu, Andhra Pradesh, Rajasthan and others offer capital subsidy, electricity duty exemption and SGST reimbursement under general industrial policy rather than solar-specific schemes. Read the current notification for your state rather than a summary, because the categories and percentages change with each policy cycle.
Realistic timelines run 12 to 18 months for a module plant from decision to first dispatch, and 24 to 36 months for a greenfield cell fab. BIS and ALMM add months at the end, not weeks, and they come after commissioning, which catches new entrants out.
Module lines are now built in 1 to 2 GW blocks. A 100 or 300 MW line, which was viable a few years ago, struggles on procurement pricing and cannot serve a utility order in one batch.
Cell plants are being built at 2 to 7 GW. Alpex commissioned 2.2 GW of TOPCon cells in Uttar Pradesh in September 2026, Premier built 7 GW, and Adani is adding 6 GW. Below about 1 GW, cell economics are difficult.
Two sets of published numbers from 2026 tell the story.
Waaree Energies, predominantly a module maker, reported an EBITDA margin of 18.15% in the April to June 2026 quarter, down from 22.53% a year earlier on higher raw material costs. Premier Energies, which makes both cells and modules, reported an EBITDA margin of about 30% in the same quarter.
That spread is the entire argument for going upstream. Module assembly is a conversion business with thin and falling margins, exposed to cell prices set by someone else. Cells are where the scarcity, and therefore the margin, currently sits.
The second number to respect is utilisation. India has far more module capacity than it can run, with reports putting average utilisation at roughly 35 to 40%. A plant modelled at 80% utilisation and priced accordingly is modelling a market that does not exist yet.
1. Budgeting machinery and forgetting working capital. Cell and glass inventory, receivables on 60 to 90 day terms, and the cash gap during BIS and ALMM approval all have to be funded.
2. Treating PLI as funding. It pays after a year of operation, and only on the capacity actually commissioned.
3. Building module capacity without a cell supply plan. After June 2026, modules without List-II cells are shut out of covered projects.
4. Buying the cheapest stringer. Breakage rates and downtime cost more over five years than the saving.
5. Planning around the wattage of today. Cell formats move fast. A line that cannot take G12 and the current half-cut and multi-busbar formats dates quickly.
A module assembly plant in India costs roughly Rs 80 to 90 crore per GW and can be running in 12 to 18 months. A TOPCon cell plant costs around Rs 470 crore per GW, on the evidence of Premier's 7 GW build, and takes two to three years. Integrated silicon-to-module projects run into thousands of crores.
The harder question is not cost but position. With module capacity far ahead of demand and cells in short supply, the margin sits upstream, and so does the protection that ALMM List-II now provides. Anyone costing a module line in 2026 should cost a cell strategy alongside it, even if the cells are contracted rather than made.
A module assembly line costs roughly Rs 80 to 90 crore per GW of capacity, so a 1 GW plant lands in that range plus land, building and working capital. A TOPCon solar cell plant costs far more, around Rs 470 crore per GW based on Premier Energies' 7 GW facility commissioned in 2026 at Rs 3,293 crore.
It depends where you sit in the chain. Module-only manufacturers reported EBITDA margins around 18% in mid-2026 and falling, while integrated cell and module makers reported around 30%. Average module capacity utilisation is only 35 to 40%, so profitability depends on order visibility rather than on capacity.
The core line is a tabber and stringer, layup and bussing station, laminator, framing and junction box stations, and a testing stack of sun simulator, electroluminescence tester and hi-pot tester. Cell manufacturing needs very different equipment for texturing, diffusion, deposition, passivation and screen printing.
Typically 12 to 18 months from decision to first dispatch for a module plant, and 24 to 36 months for a greenfield cell fab. BIS registration and ALMM enlistment happen after commissioning and add months, since both require factory inspection and product testing.
The main central scheme is the Production Linked Incentive, with Rs 19,500 crore committed under Tranche II across 39,600 MW allocated to 11 companies. Incentives are paid only after a year of post-commissioning operation. States add capital subsidy, electricity duty exemption and SGST reimbursement under their industrial policies.
Budget roughly Rs 80 to 90 crore per GW for the module line itself, plus land, building and working capital. Smaller lines of 100 to 300 MW cost proportionally less but struggle to compete on procurement pricing. Add the cost of BIS registration and ALMM enlistment, which happen after commissioning and take months.
Published 2026 results put module-only manufacturers around 18% EBITDA and falling, against roughly 30% for companies making both cells and modules. Module assembly is a conversion business exposed to cell prices set by others, which is why most Indian manufacturers are moving upstream into cells.
A 1 GW module line typically needs a covered industrial shed rather than a large land parcel, since the process is assembly rather than heavy industry. Cell plants need far more: Premier Energies built its 7 GW cell facility across 40 hectares, including utilities and water treatment.
You need BIS registration to sell legally at all. ALMM List-I enlistment is required to supply government-backed projects and most tenders, and since June 2026 those projects also require cells from ALMM List-II manufacturers. ALMM enlistment involves a factory inspection and model-specific testing.
Credence Solar runs a fully automated module plant in Rajkot, Gujarat, producing BIS-certified Mono PERC and TOPCon modules up to 745 Wp. If you are evaluating manufacturing, sourcing modules instead of building a line, or want to see an automated line in operation, read about our manufacturing process and quality systems, or get in touch through our contact page, on +91 90330 72969 or at info@credencesolar.com.
