1 MW Solar Plant Cost in India 2026: Breakdown & Payback

Picture a factory owner in Surat who asks you for a 1 MW quote. You open your calculator, multiply 1,000 kW by your residential per-watt rate, and send a number that is either far too high or dangerously thin. It is a common slip when an EPC (Engineering, Procurement and Construction firm) crosses from the 100 kW commercial segment into megawatt-scale projects. The 1 MW segment has its own cost logic, its own revenue models, and its own quoting discipline.

Key takeaway. A 1 MW solar plant in India costs roughly ₹3 to ₹4.5 crore in 2026. State regulators benchmark it near ₹3 crore per MW (Gujarat ₹3.05 crore, Karnataka's 2026 draft ₹3.07 crore including land), and EPC quotes for factory projects run higher. At a 19% CUF the plant makes about 16.6 lakh kWh a year. Simple payback on a captive plant is about 2.5 to 4 years at ₹6 to ₹10 per unit avoided.

This guide gives you the sourced cost benchmarks, the capex split, the generation math, running costs, a worked profit and payback table, the revenue routes your customer will ask about, and the per-watt framework we use to sanity-check every 1 MW quote. If you also quote smaller commercial plants, our 100 kW solar plant price guide covers the segment just below this one, and how to sell solar to factories covers the 50 to 500 kW sales process.

What does a 1 MW solar power plant cost in India in 2026?

A 1 MW solar power plant in India costs about ₹3 to ₹4.5 crore in 2026, or ₹30 to ₹45 per watt. The low end is what state regulators use as a benchmark for tariff-setting. The high end is what a factory-side EPC quote can reach once it carries DCR modules, a transformer and substation, a long evacuation line or difficult soil.

How we built this range. Three published regulator figures anchor it, and the table below lists each with its source. Our working EPC band of ₹3.5 to ₹4.5 crore is a planning range for quote review. It is not a regulator number and not a guarantee, so confirm it against current supplier quotes before you send a price.

Read the trend, not just the level. Karnataka's benchmark fell from ₹4.00 crore in FY24 to ₹3.07 crore in the 2026 draft, largely because module costs dropped. These are tariff-setting norms for power producers, so a customer quote for a captive plant will usually sit higher. The reports do not state whether "MW" means AC or DC capacity, so treat the per-MW comparison as a guide, not a quote.

The per-watt number is the one every buyer anchors on, so state its scope. Our solar cost per watt in India post tracks how the benchmark has moved, and our state-wise solar system prices post covers ordinary system prices by state.

What a turnkey quote should include: modules, inverters, mounting structures, DC and AC cabling, earthing, civil works, monitoring, testing and commissioning, and the connection to the DISCOM (Distribution Company) point. What it often leaves out: land, a long evacuation line, batteries, open-access charges and, if quoted ex-tax, GST. GST on solar goods fell from 12% to 5% on 22 September 2025, and KERC's draft cost norm reflects that cut, so say in writing whether your per-watt figure is ex-GST or incl. GST. See our GST on solar systems guide for the tax basis.

Where does the money go, the capex split

Modules and balance of system (BOS) take about 86% of a 1 MW budget, and land takes most of the rest, according to the capital cost split in Karnataka's 2026 draft tariff paper (KERC discussion paper, as reported by Saur Energy). When a customer asks why your quote is ₹38 per watt and a competitor is at ₹33, this split is the conversation you have.

An earlier source shows how fast the module line moves. The KERC FY24 order priced modules at ₹17.74 per watt (USD 0.216) and put civil works, structures, inverters, evacuation and pre-operative costs at ₹163 lakh per MW. The 2026 draft prices modules at ₹13.8 per watt. Use your own supplier quotes to split the BOS block into inverters, structures, cabling, civil works and evacuation, because no published source gives that split reliably.

Two 2026 cost drivers sit inside the module line. First, ALMM (Approved List of Models and Manufacturers) List-II covers solar cells. Per MNRE's ALMM page, the 25 May 2026 office memorandum said there is no blanket extension beyond 1 June 2026, and an 18 July 2026 clarification gave net-metering and open-access renewable projects a limited window to commission until 31 December 2026 (MNRE). So the rule is not limited to government schemes. After that date, a net-metering or open-access plant needs List-I modules and List-II cells. Our ALMM List-II exemption explainer walks through the window, and ALMM List-I and List-II explained covers how to check a model.

Second, DCR (Domestic Content Requirement) modules cost more than non-DCR modules, and DCR is mandatory under schemes such as PM-KUSUM. Ask for a current quote for both and name the difference on the proposal. Our import duty on solar modules post explains one part of that gap, and the solar panel price trends post tracks module movement. For brand and model shortlists see best solar modules in India and best solar inverters in India.

How much land and how much generation does 1 MW give?

A 1 MW ground-mount plant needs about 5 acres of flat, unshaded land and generates about 13 to 16.6 lakh kWh a year at a CUF of 15 to 19%. KERC's FY24 order assumed 5 acres per MW for its land cost, and both KERC and GERC use a 19% CUF as the norm when they set tariffs (KERC FY24 order). Tighter layouts with high-wattage modules can use less land, so confirm it with a layout drawing before you promise an acre count.

Check the basis before you promise a number. A "1 MW" plant can mean 1 MW at the inverter (AC) or about 1 MWp of modules on the roof or field (DC). Plants are usually built with more DC than AC, so the two figures differ. KERC's ₹13.8 per watt module cost on a ₹1.38 crore line works out to exactly 1,000 kWp of modules, which is a DC basis. Write the basis on every proposal, and see our glossary pages on MWp and the DC/AC ratio.

Site CUF depends on irradiance, tilt, shading, soiling, the DC/AC ratio and grid availability, so use a site-specific simulation, not a national average. Modules also lose output every year, so model degradation in year-by-year cash flow. A 1 MW plant at 15 to 19% CUF offsets about ₹1 crore to ₹1.65 crore of electricity a year at an assumed avoided tariff of ₹7.50 to ₹10 per unit (hypothetical, check the customer's own bill).

Rooftop 1 MW versus ground-mount 1 MW

Ground-mount costs include land and evacuation, while a 1 MW rooftop avoids land but needs roof strength checks, shadow-free area and a customer who owns a very large roof. We do not publish a rooftop-versus-ground per-watt gap here because we could not source one. KERC's draft puts a ₹36 lakh per MW land line on ground-mount and no land line on distributed rooftop projects, so the land cost is the first thing to price. Residential per-watt rates do not scale to this size, which is why a 1 MW quote is a different business from the home quotes most EPCs start with.

On the net-metering limit: the Electricity (Rights of Consumers) Rules allow net metering for loads up to 500 kW or the sanctioned load, whichever is lower (Ministry of Power via PIB). A 1 MW rooftop therefore usually cannot use plain net metering, and the route depends on your state commission's rules. Our DISCOM approval process guide covers the steps, and the solar site survey checklist covers what to check on the roof or plot before you quote.

Revenue routes: captive, open access, group captive, PPA and PM-KUSUM

A 1 MW plant earns back its cost through one of a few routes, and the route matters more than the module brand. The tariff your customer captures ranges from the DISCOM's regulated tariff, which it avoids, down to the low rates regulators allow for power sold to a DISCOM. For comparison, KERC's 2026 draft levelised tariff for MW-scale ground-mount projects is ₹2.65 per unit (as reported by Saur Energy).

Captive self-consumption. The factory uses every unit itself and offsets its retail tariff. This is the fastest payback route because the avoided rate is the highest. No central subsidy applies at this scale, but the owner can claim accelerated depreciation, which our accelerated depreciation guide explains in full.

Open access and group captive. Under the Green Energy Open Access Rules, 2022, a consumer with a connected load of 100 kW or more can buy renewable power through open access (PIB). Group captive projects follow Rule 3 of the Electricity Rules, 2005, which the government amended in March 2026, so check the ownership and consumption conditions in the current rule before you structure a deal. Cross-subsidy surcharge and wheeling charges are set state by state, so run the numbers for the customer's own state. PPA prices vary by state and buyer, so quote the customer's own numbers.

Third-party PPA. A developer builds and owns the plant, and your customer signs a long PPA at a price below the DISCOM tariff. The buyer puts in no capex, but the developer's return depends on state charges and the customer's credit.

PM-KUSUM Component A. Under Component A, farmers, panchayats, cooperatives and similar groups set up ground-mounted grid-connected plants of 500 kW to 2 MW, so a 1 MW plant falls in the band. The DISCOM buys the power at a tariff set by the state regulator under a 25-year PPA (PIB). DCR modules are required, so budget the premium into capex. The scheme's timelines have been extended more than once, so check MNRE's current office memorandums before you bid (MNRE PM-KUSUM page).

O&M and running costs for a 1 MW plant

Regulators allow about ₹3 lakh per MW in the first year for operation and maintenance, rising every year. KERC's 2026 draft allows ₹3.069 lakh per MW, escalating at 5.72% a year, and GERC's 2024 order allows ₹3 lakh per MW in year one, escalating at 3.84% a year (KERC draft, as reported by Saur Energy and GERC order, as reported by Mercom India). These are tariff norms for power producers, so a real contract can differ.

Build your own running-cost line from an AMC quote that names cleaning frequency, inverter service, spares, monitoring and insurance. For prices see our solar AMC pricing in India guide. Add a replacement reserve for inverters, because string inverters do not last as long as modules.

Profit and payback: a worked example

The honest answer to "what profit does a 1 MW plant make" is that it depends on the tariff you avoid. The table below is a hypothetical example, not a quote. It assumes a ₹3.8 crore plant at an 18% CUF (15.8 lakh kWh a year) and ₹3 lakh of O&M, and it ignores degradation, insurance, inverter replacement, tax and financing cost.

This is why the headline says about 2.5 to 4 years for a captive plant: it holds when the avoided tariff is ₹6 to ₹10 per unit. A plant that sells to the DISCOM at regulator-set rates earns back far more slowly. Once you add financing cost, degradation and tax, the payback changes again, so model each project from the customer's own bill. Our commercial solar ROI calculation guide shows the full stack, and solar payback by state shows how tariffs move the result.

The depreciation lever. Solar power generating systems carry a 40% depreciation rate on written-down value in the Income Tax Department's depreciation-rate table (Income Tax Department). If the customer owns the plant and has taxable profit, 40% of ₹3.8 crore is ₹1.52 crore of depreciation in year 1. At an assumed 25% tax rate that saves about ₹38 lakh of tax. If the asset is used for fewer than 180 days in the year, the claim is limited to 50%, so about ₹19 lakh. Depreciation goes to the owner, so a customer on a third-party PPA does not get it. The Income-tax Act, 2025 applies from 1 April 2026, so ask the customer's CA to confirm the section and rate on the current text. We do not give tax advice.

Financing. Lenders usually fund the larger part of a project. KERC's 2026 draft assumes 70:30 debt to equity at 10.8% interest over 13 years, and GERC's 2024 order assumes 70:30 at 10.15% over 15 years. Treat these as planning norms, because a real loan depends on the borrower and lender. Our solar financing partners in India guide maps the lender options, and solar business loan options covers the paperwork banks ask for at this ticket size.

Approvals and timeline for a 1 MW project

Approvals set your commissioning date, and the commissioning date now matters for ALMM List-II. For net-metering and open-access projects, the date MNRE's 18 July 2026 clarification gives is 31 December 2026, and a project commissioned after it needs List-II cells. Work backwards from that date: land or roof access, DISCOM or open-access approval, electrical inspection, supply lead time and commissioning tests. We have not published week counts here because they vary by state and DISCOM, so ask each approving office for its current timeline. A late commissioning date can also cut the customer's year-1 depreciation claim in half, because of the 180-day rule above.

The honest tradeoff: 1 MW deals carry better margins per quarter of effort, but they concentrate risk. Ten 100 kW deals diversify your pipeline; one 1 MW deal does not. Our opinionated take: do not chase MW-scale until your commercial rooftop pipeline consistently closes at least one 100 kW-plus project a month. The quoting discipline transfers, the risk profile does not. If you are building toward that, read how to start a solar EPC business.

The 1 MW Quote Ladder, how EPCs should price megawatt projects

The 1 MW Quote Ladder is our three-rung framework for pricing megawatt-scale projects without guessing. Each rung is a per-watt band with a defined scope, and the discipline is to never quote across rungs. These bands are our planning framework, not regulator figures. For reference, GERC's ₹3.05 crore per MW norm equals ₹30.5 per watt, and the rungs sit above it because a customer quote carries scope that a tariff norm does not.

1. 1

   Rung 1, the floor at ₹32-34/W, supply-and-install only

   Equipment supply plus installation, customer handles land, evacuation, and DISCOM approvals. Quote this only when the buyer has an in-house electrical team. Anything below ₹32/W needs a line-by-line check of the inverter, cable and structure scope.

2. 2

   Rung 2, the standard at ₹36-38/W, full turnkey

   Everything in Rung 1 plus transformer, switchgear, substation works, CEIG (Chief Electrical Inspector) and DISCOM liaison, and first-year O&M. This is where a clean turnkey 1 MW quote should land for most sites.

3. 3

   Rung 3, the loaded band at ₹40-42/W, turnkey plus performance guarantee

   Adds a generation guarantee with liquidated damages, extended O&M, and difficult site conditions like piling or long evacuation. Justify every rupee above ₹40/W in writing, because buyers at this scale benchmark three quotes.

4. R

   Review rule, re-quote every 30 days

   Module prices move fast: KERC's module assumption fell from ₹17.74 per watt in FY24 to ₹13.8 per watt in the 2026 draft. A quote older than 30 days is a liability. Put a validity date on every 1 MW proposal and re-run the module line before re-sending.

State the MWp basis and the GST basis on every rung. When the buyer pushes back on your ₹37/W against someone's ₹33/W, walk them down the ladder and ask which rung the cheaper quote sits on. Often it is Rung 1 scope presented as turnkey, and the missing ₹4/W is the transformer, the evacuation line and the approvals your customer will pay for later anyway.

How Quickest Solar CRM fits

Quoting a 1 MW project is not a one-page rate card. It is a branded proposal with a line-item BOQ (Bill of Quantities), generation model, payback math, and a validity date, followed by weeks of follow-up with a CFO, a plant head, and a landlord. That is the workflow Quickest Solar CRM was built for, and 1,000+ Indian EPCs already run their pipelines on it.

• Proposal Generator, send a branded PDF proposal in 60 seconds with your per-watt ladder, BOQ lines, and payback math pre-filled.
• Quotation System, keep module, inverter, and BOS line items versioned so a 30-day-old quote never goes out stale.
• Pipeline Management, track every 1 MW deal through site survey, term sheet, and approval stages with reminders before the quote validity lapses.
• Sales Reports, see your per-watt win rate by segment so you know which rung of the ladder actually closes.

If you want to size the customer's load correctly before you quote, pair this with our commercial solar system sizing method. And if you are setting up MW-scale operations, book a demo and we will show you a live 1 MW proposal built in under a minute.

What to do this week

India added about 35.2 GW of solar capacity in the first nine months of 2026, up about 19.5% on the same period last year (JMK Research, 9 October 2026), and the 1 MW commercial and industrial segment is where a large share of the next tranche will land. Three actions for the next seven days:

1. Re-baseline your per-watt rate card. Pull your last three 100 kW-plus quotes, recompute the module line from today's supplier quotes, and set your three Quote Ladder rungs in writing.
2. Build one reusable 1 MW proposal template. Include the capex split, a site-specific CUF assumption, the MWp basis, the revenue routes, the payback table and a 30-day validity clause. Test it on a hypothetical factory profile this week.
3. Shortlist two lenders before you need them. Get indicative terms from one specialist lender and one commercial bank at the ₹2.5 to ₹3 crore ticket size, so the financing slide of your next 1 MW proposal carries real numbers, not placeholders.

Frequently asked questions

How much does a 1 MW solar power plant cost in India in 2026?

A 1 MW solar power plant in India costs about ₹3 to ₹4.5 crore in 2026, or ₹30 to ₹45 per watt. Gujarat's regulator benchmark is ₹3.05 crore per MW for projects below 5 MW (GERC, 2024), and Karnataka's 2026 draft is ₹3.07 crore including land. Factory-side EPC quotes run higher once DCR modules, a substation or a long evacuation line are included. State whether a quote includes land and GST.

What profit does a 1 MW solar plant make in a year, and what is the payback?

It depends on the tariff avoided. A plant at an 18% CUF makes about 15.8 lakh kWh a year. At ₹8 per unit that is about ₹1.26 crore of gross saving, or ₹1.23 crore after ₹3 lakh of O&M, so simple payback on a ₹3.8 crore plant is about 3.1 years (hypothetical, before tax, financing and degradation). At ₹6 to ₹10 per unit, payback is about 2.5 to 4 years; at ₹3 per unit it is about 8.6 years.

How many units does a 1 MW solar plant generate per year?

Annual units equal 1,000 kW × 8,760 hours × CUF. At 15% that is 13.1 lakh kWh, at 17% it is 14.9 lakh kWh, and at 19% (the norm KERC and GERC use) it is 16.6 lakh kWh. Your site CUF, DC/AC ratio and degradation decide the real figure.

How much land does a 1 MW solar plant need?

A ground-mount 1 MW plant needs about 5 acres, the figure KERC used in its FY24 tariff order, and tighter layouts can use less. A rooftop 1 MW needs roughly 80,000 sq ft or more of shadow-free roof as a rule of thumb. Confirm both with a layout drawing.

Is there a subsidy for a 1 MW solar plant?

No central residential subsidy applies. PM Surya Ghar pays ₹30,000 per kW for the first 2 kW and ₹18,000 for the third kW, capped at ₹78,000 for residential systems of 3 kW and above (MNRE). Support for a 1 MW plant comes from accelerated depreciation (40% on written-down value, owner only), lender finance and, for eligible farm-sector projects, PM-KUSUM Component A. State incentives vary, so check your state.

What GST applies to a 1 MW solar plant?

GST on solar goods fell from 12% to 5% effective 22 September 2025. Installation and works-contract services are treated differently, so ask your CA how the invoice splits. This is descriptive information, not tax advice. Our GST on solar systems guide has the detail.

Do 1 MW projects need ALMM List-II cells?

For net-metering and open-access projects, MNRE's 18 July 2026 clarification allows commissioning until 31 December 2026 without List-II cells, as listed on MNRE's ALMM page. After that date, projects need ALMM List-I modules and List-II cells. There is no blanket extension, and other project types follow their own office memorandums, so check the current MNRE notice before you commit to a commissioning date.

How should an EPC quote a 1 MW project?

Quote per watt in three scope bands: ₹32 to ₹34 per watt for supply-and-install, ₹36 to ₹38 per watt for full turnkey including transformer and approvals, and ₹40 to ₹42 per watt for turnkey with a performance guarantee. These bands are a planning framework, not a guarantee. Add a 30-day validity clause, state the MWp basis and the GST basis, and re-run the module line before re-sending.