UltraTech Cement Limited, the flagship cement enterprise of the Aditya Birla Group, has crossed 2 gigawatts (GW) of captive green power capacity, establishing an operational precedent as the first cement manufacturer in India to reach this clean energy volume. Announced in early October 2026, the milestone integrates utility-scale captive solar installations, on-site wind generation assets, and industrial Waste Heat Recovery Systems (WHRS) across the producer’s nationwide network of integrated plants and grinding units.
The commissioning of this capacity expands UltraTech’s total installed green power infrastructure beyond 2,000 megawatts (MW), consisting of more than 1,600 MW of renewable solar and wind contracts paired with over 400 MW of thermal waste-to-energy recovery. The expansion elevates the company’s green energy mix to over one-third of its total manufacturing electricity requirements, insulating operating margins from volatile grid tariffs while advancing its long-term commitment to achieve an 85% clean energy share by fiscal year 2030.
Key Takeaways
- First in Indian Heavy Industry: UltraTech Cement becomes the country’s first domestic cement producer to commission and operate over 2,000 MW (2 GW) of captive green energy assets.
- Diversified Portfolio Architecture: The 2 GW fleet combines utility-scale solar generation, wind turbine farms, and extensive Waste Heat Recovery Systems (WHRS) engineered directly into cement clinker kilns.
- Margin Protection & Fuel Substitution: In an energy-intensive sector where power and fuel account for 28% to 32% of total operational expenditure, captive green generation lowers unit production costs per metric tonne of clinker.
- Decarbonisation Milestones: Accelerates UltraTech’s transition targets under international climate charters—including RE100, EP100, and the Science Based Targets initiative (SBTi)—aiming for an 85% green power mix by FY30.
- Grid Independence: On-site waste-heat generation and dedicated open-access renewable parks provide baseload continuity across manufacturing facilities in Rajasthan, Gujarat, Madhya Pradesh, Maharashtra, and Tamil Nadu.
ULTRATECH 2 GW CAPTIVE GREEN POWER ASSET BREAKDOWN
TOTAL GREEN POWER CAPACITY: >2,000 MW (2.0 GW)
┌────────────────────────────────────────────────────────────────────────┐
│ │
│ RENEWABLE SOLAR & WIND ASSETS (1,600+ MW) WHRS (400+ MW) │
│ [78–80% of Total Green Fleet] [20–22%] │
│ ████████████████████████████████████████████████████ ████████████ │
│ │
│ • On-site & ground-mount solar arrays • Clinker kiln │
│ • Captive wind turbine installations flue gas │
│ • Inter-state transmission open-access PPAs boilers │
│ • Intermittent daytime manufacturing offset • 24/7 continuous│
│ thermal base │
└────────────────────────────────────────────────────────────────────────┘
Engineering the Mix: Solar, Wind, and Clinker Waste Heat Recovery
Operating a captive clean energy fleet at a 2-gigawatt scale requires addressing the inherent intermittency of wind and solar resources. Unlike light manufacturing facilities that can pause operations during overcast or calm conditions, cement production depends on continuous, round-the-clock kiln firing: pyrogenic clinker burning in rotatory kilns takes place at temperatures exceeding 1,400°C.
To deliver stability across this industrial baseline, UltraTech’s green power architecture operates on a balanced dual-engine model:
1. Waste Heat Recovery Systems (WHRS) as Clean Baseload
Waste heat recovery forms the cornerstone of UltraTech’s zero-fuel electricity strategy. During the calcination process, massive volumes of hot exhaust gases escape from the preheater towers and clinker coolers.
Instead of venting these thermal streams into the atmosphere:
- Specialized boilers capture exhaust gases ranging between 300°C and 450°C.
- The captured heat generates superheated steam to drive dedicated closed-loop turbine generators.
- The resulting electricity requires zero incremental fossil fuel, zero biomass, and produces zero secondary carbon emissions.
With over 400 MW of installed WHRS capacity, UltraTech operates one of the largest industrial waste-heat power generations fleets globally, providing steady, dispatchable electricity throughout nighttime hours when solar arrays are inactive.
2. Utility-Scale Solar and Captive Wind Parks
To meet peak daytime electricity demands, UltraTech commissioned a nationwide network of captive ground-mounted solar plants located on reclaimed mining lands, plant perimeter buffer zones, and open-access renewable corridors. Paired with captive wind farms in high-yield coastal and plateau belts in Gujarat, Tamil Nadu, and Karnataka, these assets supply daytime power directly to clinker grinding units and conveyor logistics.
Economic Impact: Margin Insulation in an Energy-Intensive Sector
In the manufacturing of Portland and blended cements, electricity and thermal fuel represent the largest individual operational cost driver, routinely commanding roughly 30% of total operational expenditure (OpEx).
THE POWER COST ADVANTAGE (PER KILOWATT-HOUR)
STATE INDUSTRIAL GRID TARIFFS (Avg. Indian States)
[₹7.50 to ₹9.20 / kWh] ████████████████████████████████████████████
CAPTIVE COAL / LIGNITE THERMAL PLANTS (Variable Fuel Costs)
[₹5.20 to ₹6.50 / kWh] ██████████████████████████
CAPTIVE SOLAR & WIND GENERATION (Levelised Cost of Energy)
[₹2.80 to ₹3.40 / kWh] ██████████████
WASTE HEAT RECOVERY SYSTEMS (WHRS - Operational Maintenance Only)
[₹1.20 to ₹1.80 / kWh] ██████
Note: Illustrative comparative cost baselines across major industrial operating corridors in India.
By expanding captive green capacity to 2 GW, UltraTech captures substantial financial benefits:
- Levelised Cost Reduction: While state discom industrial electricity tariffs average between ₹7.50 and ₹9.20 per kilowatt-hour (kWh), captive solar and wind electricity costs average ₹2.80 to ₹3.40 per kWh. WHRS generation operates at marginal costs under ₹1.80 per kWh, consisting primarily of routine maintenance.
- Hedging Against Fossil Volatility: Reducing reliance on imported coal and domestic petcoke shields balance sheets from wild swings in international commodity benchmarks like South African coal and Newcastle futures.
- Lower Cash Production Costs per Tonne: Blending over 35% of low-cost green electricity into total plant operations directly trims manufacturing costs per bag, strengthening operating EBITDA per metric tonne against competitors who remain tethered to state grids or fossil-fueled captive plants.
Strategic Alignment: The Aditya Birla Group Sustainability Charter
UltraTech’s 2 GW green milestone aligns with corporate climate commitments established under the Aditya Birla Group’s sustainability roadmap and international environmental coalitions:
| Corporate Sustainability Charter | Binding Commitment | Progress & Execution Status |
| RE100 Commitment | 100% renewable electricity consumption across global operations by 2050 | Green power mix passed 32–35% run-rate; pacing ahead of internal interim markers |
| EP100 (Energy Productivity) | Double energy productivity across industrial manufacturing units | WHRS scaling and process efficiency upgrades across all 24 integrated kilns |
| Science Based Targets (SBTi) | Reduce Scope 1 net CO2 intensity to 425 kg/tonne of cementitious material by 2032 | Low-clinker blended cement production (PPC, PSC, Composite) and thermal substitution |
| FY30 Interim Green Power Goal | Reach an 85% clean energy share across total electricity consumption by 2030 | Current 2.0 GW forms the technical platform; scaling toward a planned >4.0 GW portfolio |
By transitioning industrial assets to captive clean energy ahead of statutory deadlines, UltraTech is also preparing for the rollout of India’s domestic Carbon Credit Trading Scheme (CCTS) administered by the Bureau of Energy Efficiency (BEE), while safeguarding European export opportunities against cross-border tariff liabilities under the European Union’s Carbon Border Adjustment Mechanism (CBAM).
Competitive Dynamics: The Race to Decarbonise Indian Cement
The domestic cement landscape—characterized by an aggressive capacity race between the two dominant market leaders, UltraTech Cement and the Adani Group (operating Ambuja Cements and ACC)—has evolved from a battle over mere grinding capacity into a race for energy efficiency and captive power sovereignty.
┌────────────────────────────────────────────────────────────────────────┐
│ INDIAN CEMENT GREEN POWER BENCHMARKS │
├──────────────────┬──────────────────┬──────────────────────────────────┤
│ PRODUCER │ CAPTIVE GREEN GW │ KEY STRATEGIC ASSETS │
├──────────────────┼──────────────────┼──────────────────────────────────┤
│ UltraTech Cement │ >2.0 GW │ 400+ MW WHRS; 1,600+ MW Solar/ │
│ (Aditya Birla) │ (FIRST IN SECTOR)│ Wind; targeted 85% mix by FY30 │
├──────────────────┼──────────────────┼──────────────────────────────────┤
│ Ambuja / ACC │ Scaling to 1 GW+ │ Aggressive solar contracts; │
│ (Adani Group) │ target │ targets 60% green share by FY28 │
├──────────────────┼──────────────────┼──────────────────────────────────┤
│ Dalmia Bharat │ ~0.5–0.7 GW │ Pioneer in early 100% RE plans; │
│ │ │ heavy focus on biomass and WHRS │
├──────────────────┼──────────────────┼──────────────────────────────────┤
│ Shree Cement │ ~0.6–0.8 GW │ High historical WHRS adoption │
│ │ │ across Rajasthan operating hub │
└──────────────────┴──────────────────┴──────────────────────────────────┘
While Adani-owned Ambuja and ACC have announced plans to invest thousands of crores to scale captive green power to 1 GW and beyond to achieve a 60% green mix by FY28, UltraTech’s crossing of the 2 GW threshold cements its operational lead.
For large-scale infrastructure contractors working on sovereign projects—such as the National Highways Authority of India (NHAI), dedicated freight corridors, and metro networks—procuring building materials certified with low embodied carbon through green-powered manufacturing has transformed into an advantageous competitive credential in public procurement tenders.
What Remains Challenging Ahead
Even as UltraTech celebrates the 2 GW milestone, scaling green energy to achieve its targeted 85% clean power mix by 2030 faces significant operational and structural hurdles:
- The Thermal Clinker Barrier (Scope 1 Emissions): Clean electricity addresses Scope 2 emissions (purchased power). However, the vast majority of cement emissions are Scope 1: process emissions generated from the chemical de-carbonation of limestone ($CaCO_3 \rightarrow CaO + CO_2$) inside kilns. Captive green electricity cannot eliminate these chemical reaction emissions without commercial carbon capture, utilisation, and storage (CCUS) infrastructure.
- Battery Energy Storage System (BESS) Economics: As solar and wind expand beyond 50% of the company’s power mix, daytime generation surpluses must be stored for overnight grinding. At current capital expenditure levels, deploying grid-scale battery systems remains cost-prohibitive compared to running fossil-fuel backup during extended low-wind periods.
- Transmission Interconnect and Open-Access Wheeling Charges: State electricity regulatory commissions (SERCs) frequently adjust cross-subsidy surcharges (CSS) and additional surcharges on inter-state and intra-state open-access renewable power, creating regulatory volatility for industrial captive generators wheeling solar power across state lines.
What Happens Next
Over the remainder of fiscal year 2027 and heading into 2028, UltraTech is scheduled to execute the next phase of its capital expenditure program, adding hundreds of additional megawatts of renewable capacity to match its ongoing manufacturing expansion toward 200 million tonnes per annum (MTPA) of cement production capacity.
The company will also begin testing pilot battery storage installations alongside its captive solar fields, while simultaneously accelerating alternative fuel and raw material (AFR) feeding systems inside its pre-calciner kilns to replace coal with municipal solid waste, agricultural residue, and industrial biomass.
Frequently Asked Questions
What specific milestone did UltraTech Cement achieve?
UltraTech Cement became the first cement manufacturing enterprise in India to surpass 2 gigawatts (2,000 MW) of captive green power capacity, consisting of renewable solar and wind generation combined with kiln-integrated Waste Heat Recovery Systems.
What is a Waste Heat Recovery System (WHRS) in cement plants?
WHRS is an engineering setup that captures hot exhaust gases emitted during the high-temperature clinker manufacturing process. The recovered heat is directed into boilers to produce superheated steam that turns a turbine, generating electricity with zero additional fuel inputs and zero secondary carbon emissions.
How does captive green power benefit UltraTech financially?
Electricity and fuel account for roughly 30% of a cement manufacturer’s total operating expenses. Captive green power produces electricity at significantly lower cost (solar/wind at ₹2.80–₹3.40/kWh; WHRS at ₹1.20–₹1.80/kWh) compared to state utility grid tariffs (₹7.50–₹9.20/kWh), lowering cash costs per tonne and insulating margins from fossil-fuel price spikes.
What is UltraTech’s clean energy target for 2030?
Under its sustainability roadmap and RE100 commitments, UltraTech is targeting an 85% clean energy share across its total manufacturing electricity consumption by fiscal year 2030.
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