A 1 MW solar plant is the point where solar stops being a rooftop decision and becomes a capital project. The numbers change shape: land enters the equation, the ownership model matters more than the panel brand, and the payback depends as much on how you sell the power as on what the system cost.
This guide covers what a 1 MW plant actually costs in India in 2026, how that budget splits across components, the land and generation you should expect, and the three ownership routes that determine your return.
What a 1 MW plant costs in 2026
A 1 MW ground-mounted solar plant in India costs roughly ₹3.5 crore to ₹4.5 crore in 2026, excluding land. That works out to about ₹35 to ₹45 per watt at system level, meaningfully lower than residential rooftop pricing because almost every cost scales better at megawatt volume.
The spread inside that range is real, not padding. A plant on flat, cleared land near an existing substation sits at the lower end. One needing site levelling, a long evacuation line, or a tracker system sits at the upper end or beyond.
Rooftop installations at the same capacity usually run slightly higher per watt than ground-mount, because structure design is constrained by the existing building and crane access is harder, though you save entirely on land.
Where the money goes
| Component | Indicative share | What drives it |
| Solar modules | 45 to 55% | Technology, DCR status, wattage class |
| Inverters | 8 to 12% | String versus central, brand, warranty |
| Mounting structure | 10 to 14% | Fixed tilt versus tracker, wind zone, terrain |
| Cabling, transformer, switchgear | 10 to 15% | Distance to evacuation point, voltage level |
| Civil work and site preparation | 5 to 10% | Terrain, drainage, fencing, access roads |
| Installation, commissioning, approvals | 6 to 10% | State process, DISCOM timelines, labour |
Modules remain the single largest line, which is why module choice moves the budget more than any other decision. The per-watt logic behind that line is covered in our solar panel price per watt guide.
Land requirement
A 1 MW ground-mounted plant needs roughly 4 to 5 acres of land with fixed-tilt structures. Single-axis trackers push that towards 6 acres because rows need wider spacing to avoid shading each other through the day.
Higher-efficiency modules reduce this. A plant built with 23%-plus efficiency panels occupies measurably less area per MW than one using 19% panels, which matters when land is leased rather than owned, or when the available plot is fixed and you are trying to fit maximum capacity onto it. Our solar panel efficiency guide explains how that area-to-output relationship works.
Land cost is excluded from every figure above because it varies more than the plant itself, from near zero on land you already own to a significant share of project cost near an industrial corridor.
How much a 1 MW plant generates
A 1 MW plant in India typically produces 15 lakh to 17 lakh units a year, which is roughly 4,000 to 4,600 units a day as an annual average. Output depends on location, with Rajasthan and Gujarat sitting at the upper end of that band and higher-rainfall regions towards the lower end.
Three factors move your number within that range: module technology and its temperature behaviour, soiling and how often the array is cleaned, and inverter sizing relative to the DC array. On the first, N-Type TOPCon's better temperature coefficient matters more at utility scale than on a rooftop, simply because the losses are multiplied across thousands of modules through an Indian summer. Our N-Type vs P-Type guide covers that difference.
Three ownership models
Captive. You build the plant, you consume the power, usually wheeled to your facility through the grid. This gives the highest return because every unit offsets electricity you would have bought at commercial tariff, typically ₹8 to ₹11 per unit. Wheeling and banking charges apply and vary by state.
Third-party PPA (OPEX or RESCO). A developer builds and owns the plant on your land or roof, and you buy the power at an agreed tariff for 15 to 25 years, usually below your current grid rate. Zero capital outlay, lower savings, no depreciation benefit for you.
Independent power producer. You build and sell power to the DISCOM or on the open market under a PPA. Returns depend entirely on the tariff you secure, and this route carries the most regulatory and offtake risk.
For most manufacturing businesses with their own land and a high commercial tariff, captive is where the arithmetic works best. Our commercial solar buyer's guide covers the vendor and specification checks that apply across all three.
Tax treatment and GST
Accelerated depreciation remains the single largest financial lever for a captive plant. Solar power generating systems qualify for depreciation at 40% of written-down value in the first year under Indian tax rules, which on a ₹4 crore plant is a substantial first-year deduction. Confirm the current schedule with your CA, since the Income-tax Act, 2025 replaced the earlier Act from 1 April 2026.
GST on solar modules and inverters sits at 5% since September 2025. On a turnkey EPC contract, the common treatment splits the contract 70% goods at 5% and 30% services at 18%, giving an effective rate of roughly 8.9%. Registered businesses may be able to claim input tax credit depending on how the generated power is used.
What moves the cost up or down
Pushes cost down: flat cleared land, proximity to an existing substation, fixed-tilt structure, large-format modules reducing panel count, non-DCR modules where the project does not need subsidy or net metering.
Pushes cost up: trackers, difficult terrain or high wind zone, long evacuation line, DCR-compliant modules, elevated structures, and any site needing significant civil work before installation begins.
That DCR point is worth checking early rather than late. Projects claiming government incentives, net metering, or open access generally need ALMM-listed modules with Indian-made cells, published by MNRE, and that requirement changes both your module cost and your supplier shortlist.
Final word on 1 MW solar plant cost
Budget ₹3.5 crore to ₹4.5 crore for a 1 MW plant excluding land, plan for 4 to 5 acres with fixed-tilt structures, and expect 15 to 17 lakh units a year depending on location. The ownership model you pick will move your return more than any single equipment decision, and accelerated depreciation is what makes the captive route work for most businesses.
For lifetime cost per unit rather than upfront capital, our LCOE guide works through the full calculation. For module supply on a megawatt-scale project, contact our team for ALMM-listed N-Type TOPCon modules from Atal's 1.44 GW line.
Frequently asked questions
What is the cost of a 1 MW solar power plant in India?
Roughly ₹3.5 crore to ₹4.5 crore in 2026 for a ground-mounted plant, excluding land. This works out to about ₹35 to ₹45 per watt at system level. Site conditions, structure type and whether DCR-compliant modules are required move the figure within and sometimes beyond that range.
How much land is required for a 1 MW solar plant?
About 4 to 5 acres with fixed-tilt structures, rising towards 6 acres if single-axis trackers are used, because tracker rows need wider spacing to avoid shading. Higher-efficiency modules reduce the area needed for the same capacity.
How many units does a 1 MW solar plant generate per day?
Around 4,000 to 4,600 units a day as an annual average, which works out to roughly 15 lakh to 17 lakh units a year. Output is higher in Rajasthan and Gujarat and lower in higher-rainfall regions.
Is a 1 MW solar plant profitable in India?
For a business with its own land and a commercial tariff of ₹8 to ₹11 per unit, a captive 1 MW plant generally pays back well, helped considerably by accelerated depreciation at 40% of written-down value in year one. Returns under a third-party PPA are lower but require no capital outlay.
What is the GST on a 1 MW solar plant?
GST on solar modules and inverters is 5% since September 2025. On a turnkey EPC contract, the common treatment splits the contract 70% goods at 5% and 30% services at 18%, giving an effective rate of roughly 8.9%.
Do 1 MW projects need ALMM-listed panels?
If the project claims government incentives, net metering, or open access, then generally yes, including Indian-made cells under the Domestic Content Requirement. A purely captive behind-the-meter plant with no incentive claim may have more flexibility, so confirm the requirement for your specific route before finalising module supply.
