Indian renewable power generation: Indian renewable equities face a narrowing return advantage over long-dated US Treasuries

Overview

This Bernstein Flashmail examines whether Indian renewable equities provide adequate compensation relative to long-dated US government bonds. It frames renewable plants as bond-like contracted cash-flow assets but argues that their return premium is constrained by high valuations, capital intensity and substantial execution, funding and currency risks.

Core views

Bernstein compares a US 30-year government bond yielding 5.44% with a typical Indian solar-wind plant earning approximately 9-10% project IRR under a 25-year contract. After allowing for 3% currency depreciation, the report estimates the Treasury offers an 8.4% INR return. Long-duration US Treasury yields, including swap rates, have risen enough that their gap to Indian renewable project returns is the narrowest since India shifted decisively toward renewable tendering from feed-in tariffs in 2017. The report views renewable plants as broadly bond-like because they receive contracted annuity-like payments, while interest expense is their largest cost item. The report stresses that apparently stable contracted cash flows do not eliminate important project risks. India’s renewable generation market is intensely competitive, with typical project IRRs of roughly 9-10%, equity IRRs of 12-14%, and company guidance of 15-16% equity IRRs for more complex projects. Growth requires continual capital deployment and reinvestment, making shareholder returns dependent on cash returns rather than a low-capital growth model. Risks include solar and wind load factors, receivables from distribution companies, construction capex, transmission delays, curtailment, currency exposure and debt costs. To test prospective equity returns, Bernstein models a 10-year investment in a renewable stock at a 3x P/B entry multiple, against a prevailing sector multiple of about 4x P/B. It assumes 15% project ROE, full reinvestment of ROE into new growth capital at similar returns, and two return paths: a more realistic back-ended profile of 10% ROE for the first 10 years and 20% ROE for the next 20 years, and a theoretical flat 15% ROE case. In the back-ended case, an investor must exit at the same 3x P/B multiple merely to achieve a 10% INR CAGR; in the flat-ROE case, a 2x P/B exit produces a 10.4% CAGR. At lower exit multiples, modeled returns fall sharply: a 1.5x exit produces 2.6% in the back-ended case and 7.3% in the flat case, while a 1x exit produces -1.4% and 3.0%, respectively. Bernstein's project sensitivity analysis shows that financing and operating disruptions meaningfully affect equity returns. Every 100bp increase in interest rates reduces equity IRR by 160bp. Each 1% of uncompensated curtailment reduces equity IRR by roughly 40bp. USD-linked imported cells, wafers and processing inputs such as silver and aluminium expose project costs to rupee depreciation, while longer receivable days further reduce project equity IRR. These sensitivities explain why the report sees the current return gap versus US long-duration bonds as narrow despite renewable projects' higher uncertainty. The disclosure valuation methodologies retain differentiated company assumptions. Bernstein values ReNew with DCF to a US$8 target, using 12% cost of equity, 9% cost of debt, around 5% market share beyond 2029 and WACC+2% returns. Adani Green's DCF-derived target is INR980, using 10% cost of equity, 6% cost of debt, 11-12% market share beyond 2030 and WACC+3.5% returns. NTPC Green's DCF-derived target is INR85, assuming 5.5GW annual capacity additions through FY40, around 9% market share for additions through FY60 and an 8.5% WACC.

Analysis framework

Bernstein first benchmarks contracted Indian renewable project returns against US long-duration Treasury yields after currency effects. It then models 10-year equity outcomes using entry and exit P/B multiples, alternative ROE timing profiles and full reinvestment assumptions, before testing project IRR sensitivity to debt costs, USD/INR movement, curtailment and receivable days. Company target prices are derived separately using DCF assumptions for existing projects, pipelines, capacity additions and market share.

Methodology notes

• Valuation methodsDCF (Discounted Cash Flow)

  Discounted cash flow valuation for ReNew, Adani Green and NTPC Green

  Bernstein estimates company target prices by discounting project and growth assumptions using stated costs of equity, debt or WACC.

• Valuation methodsPB valuation

  Price-to-book multiple and exit-multiple return analysis

  The report models a 10-year stock return from a 3x P/B entry under alternative future P/B exit multiples and ROE paths.

• Other

  Project equity-IRR sensitivity analysis

  Bernstein tests how debt costs, currency movement, curtailment and receivable days change renewable-project equity returns.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• ReNew (RNW)

  Covered renewable developer; DCF valuation incorporates existing projects, pipeline projects and future sector market share.

  Strengths

  Existing and pipeline projects, with assumed ~5% market share beyond 2029.

  Weaknesses

  Requires a 12% cost of equity and 9% cost of debt in Bernstein's valuation.

  Comparison

  Target price is US$8 versus a US$6.84 current price in the ticker table.

  Risks

  Exposure to project commissioning, transmission, curtailment, currency and refinancing risks.

• Adani Green Energy Ltd (ADANIGR.IN)

  Covered renewable developer; DCF valuation incorporates existing projects, pipeline and future sector market share.

  Strengths

  Bernstein assumes 11-12% market share beyond 2030; potential upside includes foreign investment, acquisitions and faster Khawda execution.

  Weaknesses

  Solar PV manufacturing margins may compress more sharply than expected.

  Comparison

  Underperform rating; INR980 target price versus INR1,300.90 current price in the ticker table.

  Risks

  Slower commissioning, transmission constraints, curtailment, rupee depreciation, refinancing challenges and margin compression.

• NTPC Green (NTPCGREE.IN)

  Covered renewable developer; DCF valuation is based on projected capacity additions and market share.

  Strengths

  Assumes 5.5GW annual capacity additions through FY40 and ~9% share of capacity additions through FY60; potential support from state-government ventures and renewable policy.

  Weaknesses

  Bernstein does not include BESS in its valuation assumptions.

  Comparison

  Market-Perform rating; INR85 target price versus INR95.42 current price in the ticker table.

  Risks

  Execution deterioration, large Indian rate hikes and grid-connectivity delays.

Key data

• US 30-year Treasury yield5.44%Equivalent to an estimated 8.4% INR return after assuming 3% currency depreciation.
• Typical Indian renewable project IRR~9-10%Typical solar-wind project IRR under a 25-year contract.
• Typical renewable equity IRR12-14%More complex projects are guided at 15-16% equity IRR.
• Sector valuation~4x P/BMost Indian renewable players trade at this level; Bernstein models a 3x P/B entry.
• Interest-rate sensitivity-160bp equity IRR per +100bp in ratesShows debt cost is a major driver of project returns.
• Curtailment sensitivity~ -40bp equity IRR per 1% curtailmentApplies when curtailment is not compensated.

Impact & implications

The report argues that Indian renewable equities must sustain strong ROE, reinvestment returns and exit valuations to deliver a meaningful premium over a US Treasury return adjusted for currency depreciation. Higher rates, rupee weakness, curtailment and working-capital pressure can materially erode that premium.

Risks

• Renewable projects may be commissioned more slowly than expected.
• Transmission constraints, grid-connectivity delays and uncompensated curtailment could reduce returns.
• Further rupee depreciation or a slower-than-expected decline in interest rates could weaken project economics.
• Refinancing holding-company bonds may prove difficult.
• Solar PV manufacturing margins could compress more sharply than expected.
• Execution may deteriorate relative to Bernstein's assumptions.

What to watch

• The path of global and Indian interest rates, given the large equity-IRR sensitivity to borrowing costs.
• USD/INR movement and USD-linked costs for cells, wafers, silver and aluminium.
• Curtailment levels, transmission availability and grid connectivity.
• Receivable days from distribution companies.
• Commissioning and capacity-addition execution, including the Khawda project.
• Potential foreign investment, acquisitions and government support for renewable capacity.