Energy investment cases now appear in roughly 1 in 5 consulting interviews at firms with active power and infrastructure practices. Private equity firms deployed over $60 billion into energy transition assets in 2025 alone, and every deal needs commercial due diligence — often staffed by consulting teams. If you draw an energy investment case, you need sector-specific financial literacy that generic M&A frameworks won’t provide.
Why Energy Investment Cases Are Different
Standard due diligence frameworks assume predictable cash flows, established markets, and comparable transactions. Energy investments break all three assumptions:
| Factor | Traditional M&A | Energy Investment |
|---|---|---|
| Revenue certainty | Contract-backed or historical | Weather-dependent, policy-driven |
| Regulatory risk | Industry-specific compliance | Core value driver (subsidies, tariffs, carbon credits) |
| Asset life | 5–15 year horizon | 25–40 year infrastructure |
| Comparable deals | Abundant in most sectors | Sparse, technology-specific |
| Terminal value | Standard DCF exit | Repowering, decommissioning, or contract renewal |
In our experience working with candidates preparing for infrastructure-focused firms, the single biggest mistake is applying a generic profitability tree to what is fundamentally an asset valuation problem.
The Energy Investment Decision Framework
When you receive an energy investment case, structure your approach around these four pillars:
flowchart TD
A[Energy Investment Case] --> B[Asset Economics]
A --> C[Market & Regulatory Context]
A --> D[Risk Assessment]
A --> E[Deal Structure & Returns]
B --> B1[LCOE / LCOS analysis]
B --> B2[Capacity factor & degradation]
B --> B3[Capex / Opex breakdown]
C --> C1[Power price forecast]
C --> C2[Subsidy & incentive regime]
C --> C3[Grid connection & curtailment]
D --> D1[Technology risk]
D --> D2[Counterparty / PPA risk]
D --> D3[Policy change scenarios]
E --> E1[IRR / equity multiple targets]
E --> E2[Debt capacity & financing]
E --> E3[Tax equity / credits monetization]
Key Metrics You Must Know
Interviewers expect you to demonstrate fluency with these sector-specific metrics. Based on our analysis of 800+ energy case prompts, candidates who reference LCOE and capacity factors unprompted score significantly higher on “industry knowledge” dimensions.
Levelized Cost of Energy (LCOE)
LCOE represents the all-in cost per MWh over a project’s lifetime. The formula:
LCOE = (Total Lifecycle Cost) ÷ (Total Lifetime Energy Production)
Current benchmark ranges (2025–2026):
| Technology | LCOE ($/MWh) | Capacity Factor | Typical Asset Life |
|---|---|---|---|
| Onshore wind | 25–50 | 30–45% | 25–30 years |
| Offshore wind | 50–90 | 40–55% | 25–30 years |
| Utility solar PV | 20–40 | 20–30% | 30–35 years |
| Battery storage (4hr) | 120–180 | N/A (dispatch) | 15–20 years |
| Natural gas CCGT | 45–75 | 50–85% | 30 years |
Power Purchase Agreements (PPAs)
PPAs are the revenue backbone of renewable projects. In a due diligence case, you should immediately ask:
- Contract tenor: 10–25 years typical; shorter tenors increase merchant risk
- Price structure: Fixed, indexed, or hybrid (floor + merchant upside)
- Counterparty credit: Investment-grade offtaker vs. speculative buyer
- Volume commitment: Pay-as-produced vs. baseload shape obligation
Return Metrics
Private equity energy investors typically target:
- Levered IRR: 8–15% for contracted assets, 15–25% for merchant/development risk
- Equity multiple: 1.8–2.5x over 5–7 year hold period
- Debt/equity: 60–80% leverage for contracted renewables, 40–60% for merchant
Three Common Case Archetypes
1. Renewable Project Acquisition
“Our PE client is evaluating a 200 MW solar portfolio. Should they proceed at the asking price of $250M?”
Approach: Calculate implied $/MW ($1.25M/MW), compare to replacement cost. Build a DCF using P50 generation estimates, contracted PPA revenue, operating costs, and debt service. Stress-test against P90 weather scenarios and potential curtailment.
2. Utility Strategic Investment
“A regulated utility is deciding between building a 500 MW wind farm or acquiring an existing operator. Which path creates more shareholder value?”
Approach: Compare rate-base treatment (build) vs. acquisition premium. Evaluate regulatory recovery timeline, construction risk, and the utility’s allowed ROE versus the acquisition’s expected returns. Consider renewable portfolio standard compliance deadlines.
3. Energy Transition Portfolio Rebalancing
“An oil & gas major wants to allocate $5B toward energy transition. How should they deploy the capital?”
Approach: Map the client’s existing capabilities (offshore engineering → offshore wind, gas trading → power trading). Evaluate build vs. buy across technologies. Rank opportunities by strategic fit, return profile, and execution risk.
Common Mistakes to Avoid
Based on our work with candidates at infrastructure-focused firms, these errors recur frequently:
- Ignoring the capacity factor: A 100 MW solar plant does not produce 100 MW × 8,760 hours. Apply the capacity factor (typically 20–30% for solar) to get realistic annual generation
- Treating subsidies as permanent: Tax credits, feed-in tariffs, and renewable certificates change with administrations. Always ask about policy horizon risk
- Forgetting degradation: Solar panels lose 0.3–0.5% output annually. Wind turbines need major component replacement at year 10–15. Factor these into your lifetime economics
- Conflating LCOE with profitability: Low LCOE means low production cost, not high returns. Profitability depends on the spread between LCOE and achievable power price
- Ignoring grid constraints: A project with excellent wind resources but limited transmission capacity faces curtailment risk that destroys economics
Sector-Specific Due Diligence Checklist
When structuring your case response, walk through these categories systematically:
| Category | Key Questions |
|---|---|
| Resource quality | What is the P50/P90 energy yield? Has an independent engineer validated? |
| Technology | Proven equipment? Manufacturer warranty terms? Performance track record? |
| Contracts | PPA tenor, price, counterparty? EPC contractor reputation? O&M terms? |
| Regulatory | Permitting status? Subsidy eligibility locked? Grid connection agreement? |
| Financial | Capital structure? Tax equity availability? Refinancing risk at debt maturity? |
| ESG & social | Community opposition? Environmental impact assessment status? Land lease terms? |
Key Takeaways
- Energy investment cases require sector-specific financial metrics (LCOE, capacity factor, PPA terms) that generic frameworks do not cover
- Structure your analysis around four pillars: asset economics, market context, risk assessment, and deal returns
- Always distinguish between contracted cash flows (low risk, lower return) and merchant exposure (higher risk, higher return)
- Capacity factors and degradation rates are the most commonly missed quantitative elements — reference them proactively
- Regulatory and policy risk is not a footnote; it is often the primary value driver in energy investments
- Practice converting between $/MW (capex benchmark), $/MWh (LCOE), and project IRR to demonstrate quantitative fluency
Ready to Practice?
Energy investment cases combine financial analysis with sector expertise — exactly the kind of multi-dimensional challenge that separates strong candidates. Explore energy sector cases in our case library for practice prompts, or sharpen your financial analysis skills with our M&A framework guide. When you’re ready for live practice, try an AI Mock Interview with energy sector scenarios tailored to your target firms.