Overview
What is a Utility PPA Investment?
Equity participation in large-scale solar (50-300+ MW) selling to state DISCOMs, SECI, or government aggregators. Projects awarded through competitive auctions with 25-year PPAs.
Trade-off: Lower IRR, Higher Stability
Equity IRRs (14-16%) are lower than commercial PPAs, but sovereign-grade counterparty and 25-year tenure provide unmatched predictability.
Value Proposition
Why Utility PPAs?
Sovereign-Grade Security
State/central government backing. SECI/NTPC carry implicit sovereign guarantee.
AAA
25-Year Visibility
Longest PPA tenure. Full project life cash flow certainty.
25 yrs
Must-Run Status
Priority dispatch. No curtailment under normal conditions.
100%
Better Leverage
Lenders comfortable with 75:25 D:E for sovereign-backed projects.
75:25
Lower Cost of Debt
IREDA, PFC, REC offer preferential rates. 50-100 bps lower.
9.5-10.5%
Scale Opportunities
Projects typically 50-300 MW. Larger tickets for institutions.
50-300 MW
Structure
Deal Parameters
| PPA Tenure | 25 years |
| Tariff Structure | Fixed (leveled) |
| Project Size | 50-300 MW |
| D:E Ratio | 75:25 |
| Cost of Debt | 9.5-10.5% |
| Equity Investment | ₹0.9-1.2 Cr/MW |
Security
Payment Security
SECI Payment Security Fund
₹2,500 Cr corpus
Dedicated fund for DISCOM defaults.
LC/BG from Offtaker
1-3 months billing
Letter of Credit or Bank Guarantee.
Tripartite Agreement
RBI covenant
State, RBI, central govt agreement.
Termination Payment
PPA value
Early termination compensation.
Illustrative
Sample 100 MWp Project
| Project Capacity | 100 MWp |
| Total Capex | ₹420 Cr |
| Equity | ₹105 Cr (25%) |
| PPA Tariff | ₹2.75/kWh |
| Project IRR | 11.2% |
| Equity IRR | 15.4% |
| DSCR Average | 1.52x |