Power
Three businesses share one label. Generation is a contracted-cashflow business. Transmission and distribution is a project business. The equipment layer beneath both is manufacturing. They earn differently, they cycle differently, and they should never carry the same multiple.
Renewable generation lowers operating cost but cannot dispatch on demand; the grid build-out is where the near-term spend sits; and inside a transformer, the core is roughly seventy percent of the cost.
Generation, the grid, and the equipment beneath it.
Generation
- Thermal & nuclearDispatchable, but higher operating cost and a carbon footprint that increasingly carries a commercial penalty.
- SolarJunction boxes and inverters are the equipment content. Low operating cost, but generation follows the sun.
- WindGround-based plus inverter. Same intermittency problem, different profile.
- StorageBattery systems and pumped storage — water pumped uphill on surplus renewable output, released to generate at peak. The bridge between low-cost and dispatchable.
The T&D equipment chain
| Segment | Indicative market size |
|---|---|
| Cables (LV & HV) | ~₹55,400 cr |
| Switchgear — low voltage | ~₹30,700 cr |
| Transmission towers | ~₹10,000 cr |
| Conductors | ~₹8,000 cr |
| Power transformers | ~₹5,700 cr |
| Switchgear — high voltage | ~₹5,200 cr |
| Insulators | ~₹1,000 cr |
| Capacitors | ~₹700 cr |
Cables and low-voltage switchgear dominate the equipment pool by value. Sizing tells you where volume sits; it does not tell you where margin sits.
Two contracting models, and the core inside the transformer.
Generation is sold two ways. Under an EPC model the project cost is borne by the end consumer, and the developer is effectively a contractor. Under a RESCO model the developer carries the capital — land, equipment, construction — and signs a long-term power purchase agreement with a distribution utility, typically twenty to twenty-five years at a fixed tariff. The first is a project margin; the second is an annuity with leverage attached, and leverage is measured as long-term debt against funds from operations plus cash cover.
Commercial and industrial offtake changes the risk profile. Selling renewable power directly to commercial and industrial users usually fetches a higher rate than a utility PPA, but the price is not fixed — it moves with the spot market. Higher realisation, more volatility. The contract mix between fixed-tariff PPA and merchant exposure is one of the first things to establish.
Intermittency is the sector's central engineering and commercial problem. Renewable generation carries low operating cost and expands margin, but cannot be dispatched on demand. Thermal with storage dispatches reliably but at higher operating cost and with a carbon footprint. Firm dispatchable renewable energy — renewable generation integrated with battery storage to deliver a contracted, reliable supply — is the attempt to have both, and the premium it commands is worth quantifying rather than assuming.
Inside a transformer
The core is the transformer. It accounts for roughly 70% of total cost and about 30% of weight — so the economics of a transformer maker are largely the economics of its core steel procurement.
- The physicsMagnetic fields induce unwanted eddy currents in a solid core, wasting energy as heat. Stacking thin laminated strips instead of using solid steel suppresses those currents.
- CRGOCold-rolled grain-oriented steel. Grains aligned in one direction, giving the lowest core loss and highest magnetic efficiency. Used in high-voltage power transformers.
- CRNGONon-grain-oriented. Randomly arranged grains, so it performs the same in every direction — suited to motors and generators, where field direction changes.
- CRNONon-oriented, highest losses of the three. Used where efficiency is not the priority, typically smaller distribution transformers.
CRGO has the lowest losses, then CRNGO, then CRNO. Grade selection is therefore a design decision with a direct cost and efficiency consequence, and a company's grade mix tells you which end of the market it serves.
Evacuation, contract quality, and input control.
Evacuation capacity
Generation without grid connectivity earns nothing. Whether a developer has secured the transmission connection to evacuate the power it can produce is a harder constraint than the capacity number itself.
Contract quality
Twenty-five year fixed-tariff PPAs with a creditworthy offtaker are a different asset from merchant exposure. The blend of fixed, merchant and C&I sets both the realisation and the volatility.
Control of the core input
For equipment makers, the grade and sourcing of core steel is the cost position. For cable and conductor makers, metal is the equivalent. Pass-through terms decide who absorbs a commodity move.
What to answer before underwriting.
- →Which business is this? Generation, transmission and distribution project work, or equipment manufacturing. The comparable set differs entirely.
- →EPC or RESCO. Who carries the capital, and therefore whether this is a project margin or a levered annuity.
- →Contract mix. Fixed-tariff PPA versus merchant versus C&I, both current and projected. Merchant lifts realisation and volatility together.
- →Evacuation. Is grid connectivity secured for the capacity being built, and what is the lead time on the balance?
- →Resource mix. Solar, wind, hybrid, and any firm dispatchable configuration — with realisation for each.
- →Leverage. Long-term debt against funds from operations plus cash cover, and the tenor against the PPA tenor.
- →ISTS waiver eligibility. Which projects qualify under the commissioning deadline, and what the economics look like without the waiver.
- →REC treatment. Whether certificate revenue is assumed in the return, and at what price.
- →For equipment makers: grade mix. CRGO, CRNGO or CRNO, and the sourcing arrangement — import dependence here is the main input risk.
- →Price pass-through. Do contracts carry commodity escalation clauses, or does a steel or copper move land entirely on the manufacturer?
- →Order book composition. For project and equipment businesses, the split between utility, private and export work, and execution timelines on each.
- →Storage economics. Where battery or pumped storage is part of the offering, what it costs and what premium the firm supply actually earns.
What to monitor, quarter by quarter.
| KPI | Calculation / source | Benchmark or read-through |
|---|---|---|
| Operational capacity (GW) | Commissioned vs contracted vs pipeline | Only commissioned capacity earns; pipeline is intent |
| Capacity utilisation factor | Actual output ÷ theoretical maximum | Guidance in the sector has run above 19%; varies sharply by resource |
| Evacuation capacity secured | Grid connectivity vs generation capacity | The hard constraint; a shortfall strands otherwise good assets |
| Average realisation (₹/kWh) | Revenue ÷ units sold, by resource | Split solar, wind and hybrid — they price differently |
| Contract mix | Fixed PPA vs merchant vs C&I | Merchant share is the volatility dial |
| Leverage | Long-term debt ÷ (FFO + cash cover) | The standard measure for a RESCO balance sheet |
| Weighted average PPA tenor | Years remaining, weighted | Against debt tenor — a mismatch is a refinancing risk |
| REC revenue | Certificate income ÷ total revenue | Market-priced, so treat separately from contracted tariff |
| Order book / revenue | Closing book ÷ TTM revenue | For project and equipment businesses; check execution timelines |
| Core steel cost per unit | CRGO or equivalent ÷ transformer output | The core is ~70% of transformer cost — this is the margin driver |
| Grade mix | CRGO / CRNGO / CRNO by volume | Indicates which end of the market the company actually serves |
| Capacity utilisation (manufacturing) | Output ÷ installed capacity | Equipment margins are operating-leverage driven |
| Receivable days | Debtors ÷ revenue × 365 | Distribution utilities are slow payers; watch the trend |
How the thesis breaks.
- !Stranded capacity. Generation built ahead of evacuation is capital earning nothing. Capacity announcements should always be read against grid connectivity.
- !Offtaker credit. A twenty-five year PPA is only as good as the distribution utility signing it. Payment delays are a recurring feature of the sector, not an exception.
- !Policy cliffs. The ISTS waiver has a commissioning deadline. Projects that miss it face a materially different delivered cost.
- !Merchant exposure in a soft market. Spot-linked C&I sales lift realisation in tight conditions and fall away in loose ones, with no contractual floor.
- !Input pass-through. Where equipment contracts lack escalation clauses, a move in core steel or copper lands entirely on the manufacturer, with a lag.
- !Import dependence on core grades. Domestic availability of the higher grades is limited, so sourcing disruption is a live constraint on transformer output.
- !Leverage against a long build. Renewable developers carry project debt through construction. A commissioning delay compounds interest against zero revenue.
The figures, and where they stand.
| Metric | Value | Note | Basis |
|---|---|---|---|
| Cables (LV & HV) market | ~₹55,400 cr | The largest equipment pool by value | Research note |
| Switchgear — LV / HV | ~₹30,700 cr / ~₹5,200 cr | Very different competitive sets | Research note |
| Transmission towers | ~₹10,000 cr | Project-linked demand | Research note |
| Conductors | ~₹8,000 cr | Metal-price sensitive | Research note |
| Power transformers | ~₹5,700 cr | Core steel is the dominant input | Research note |
| Insulators / capacitors | ~₹1,000 cr / ~₹700 cr | Smaller, more specialised pools | Research note |
| Transformer core | ~70% of cost | And ~30% of weight | Technical |
| Core loss ranking | CRGO < CRNGO < CRNO | CRGO most efficient; CRNO least | Technical |
| Capacity utilisation guidance | >19% | Sector guidance for renewable CUF | Guidance |
| PPA tenor | 20–25 years | Fixed price, under the RESCO model | Contract norm |
| ISTS charge waiver | To 2030 | For qualifying renewable projects | Policy |