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01st Jul 2026
Energy accounts for a significant share of industrial operating expenses. It does not appear on the balance sheet as a single line item. It is embedded in every tonne of ore processed, every barrel lifted, every kilometre of fibre extruded. And for decades, India's most energy-intensive industries — metals, mining, oil and gas, petrochemicals, have simply absorbed it as a fixed cost of doing business, passing its volatility down the P&L.
That calculus is changing. And the industries that recognise it earliest will carry a structural cost advantage into the next decade.
Consider what it actually takes to run India's largest onshore oil production field in Barmer, Rajasthan. Submersible pumps running continuously across 500-plus wells. Water injection systems maintaining reservoir pressure. SCADA networks, compressors, and gas processing facilities operating around the clock. The energy demand is not incidental to the operation — it is the operation.
The hidden dimension is not just the tariff. It is the exposure. An industrial operation locked into grid pricing has no hedge against escalation, no protection against curtailment, and no mechanism to turn green energy for industrial operations from a liability into a strategic asset. The cost is not simply what you pay today, it is the compound effect of paying whatever the grid decides to charge for the next twenty years.
Across India's hard-to-abate industries, energy typically accounts for 20–40% of total operating expenditure, yet receives the least strategic attention. The shift to structured renewable energy sources — solar, wind, storage, and hybrid balancing — is now the most direct lever available to change this.
| Industry | Energy as % of OPEX | Key Exposure |
|---|---|---|
| Aluminium Smelting | 35–40% | Grid tariff volatility; power interruptions |
| Steel (Blast Furnace) | 20–25% | Fuel price fluctuation; process heat cost |
| Oil & Gas (Upstream) | 15–20% | Remote grid unreliability; diesel backup cost |
| Cement | 25–30% | Coal/petcoke price exposure |
| Synthetic Textiles | 18–22% | Peak tariff surcharges; RPO non-compliance |
For every one of these sectors, energy is a core operational variable, and one that a well-structured renewable energy project can materially stabilise.
The partnership between Serentica Renewables and Cairn India oil and gas — part of Vedanta Group and India's leading private oil and gas exploration and production company — is the clearest demonstration yet of what it looks like when an industrial operator stops absorbing energy cost and starts structuring it.
In April 2026, Cairn commenced sourcing 25 MW of captive renewable energy for oil and gas industry operations at its Mangala facility in Barmer — India's largest private onshore oil-producing asset — under a long-term Power Delivery Agreement with Serentica. This is not a pilot. It is not a CSR initiative. It is an operational energy decision, executed at scale, with hard contractual commitments on volume, reliability, and price.
Serentica supplies solar and wind energy solutions generated at its Gadag facility in Karnataka, delivered cross-state under the ISTS framework, to Cairn's Barmer field. The results are material: 20% of total power demand at the Mangala facility now comes from hybrid renewable energy project infrastructure. Approximately 153 million units of clean power are delivered annually. And 115 kilotonnes of CO₂e are eliminated every year — equivalent to planting 5.75 million trees, from a single 25 MW agreement.
The conventional objection to renewables in industrial settings has always been reliability. Solar energy projects are diurnal. Wind is intermittent. An oil field running 500-plus wells around the clock cannot tolerate the gaps. Our fully integrated hybrid renewable energy project — combining solar, wind, battery storage, and advanced balancing, contracted at a 70% Capacity Utilisation Factor, is built precisely to eliminate that objection.
Here is what this delivers for industrial renewable energy Indiaoperations:
Cairn's move is part of a broader, accelerating shift. Hindustan Zinc, BALCO, and MRF have each reached the same conclusion: that green energy for industrial operations is not a cost addition, it is a cost restructuring that improves the long-term economics of the business.
Renewable Purchase Obligations are rising. CBAM will penalise carbon-intensive exports into European markets. Green financing increasingly requires verifiable decarbonisation. The hidden energy cost of industrial operations is no longer hidden, it is visible in ESG disclosures, export pricing, and the widening competitive gap between those who have restructured their energy and those who have not.
For Cairn India oil and gas, the question has already been answered. For the rest of India's industrial sector, the question is no longer whether to act, it is whether the cost of waiting is one they can afford.
1. What makes energy costs 'hidden' in industrial operations?
They're distributed across fuel, grid tariffs, diesel backup, and RPO penalties — never tracked as a single line item, making the true cost difficult to see and nearly impossible to manage strategically.
2. How does Serentica's Power Delivery Agreement differ from standard grid power?
A PDA fixes the volume, price, and delivery terms of renewable power over 10–25 years — offering price certainty, supply reliability, and RPO compliance in a single long-term arrangement.
3. Can renewable energy support 24/7 oil and gas operations?
Standalone solar or wind cannot. But Serentica's hybrid system — solar, wind, battery storage, and balancing contracted at 70%+ CUF — delivers the firm, dispatchable power that continuous industrial operations require.
4. What is Capacity Utilisation Factor (CUF) and why does it matter?
CUF measures how much of contracted capacity is actually delivered over a year. At 70% CUF, Serentica guarantees Cairn a firm, predictable renewable energy volume, not best-effort intermittent supply.
5. Beyond cost savings, what else does switching to renewable energy deliver?
Lower cost of capital through improved ESG ratings, export competitiveness as CBAM prices in carbon intensity, and automatic RPO compliance — avoiding penalties that are increasingly material for large industrial consumers.
