Level 4 · Energy Technologies & Economics · Module 10
Economics of a Power Plant
How does a power plant make money?
- 4
- connected lessons
- 8
- guided learning steps
- 175
- estimated minutes
The central idea
How does a power plant make money?
Economically, a power plant is a large investment today in exchange for MWh and cash flows over the next 20-30 years.
Economically, a power plant is a large investment today in exchange for MWh and cash flows over the next 20-30 years. The public preview explains the operating logic, professional relevance and boundaries before the complete guided application.
Professional relevance
Why this matters beyond the classroom.
Developers budget funding engineers define production traders model achieved price
What you will learn
Four lessons that build one working mental model.
- 01
Build and Operate the Asset
Development/construction CAPEX, fixed/variable OPEX, production, availability, losses and working capital.
A power plant consumes capital before it produces saleable electricity. Development costs begin with land, studies, permits, connection and design. Construction requires equipment, civil works, grid infrastructure and contingencies. Financing accrues before commercial operation. Only after commissioning does the asset generate MWh and cash, often for 20–30 years or longer. Economics therefore connects four timelines: capital expenditure, technical production, market/contract revenue and financing. A technically excellent plant can destroy value if built too expensively or late. A low-cost plant can struggle if its output coincides with low prices. A profitable unlevered project can default if debt service is badly shaped. The central intuition is discounted exchange: invest a large amount today for uncertain future MWh and cash flows. Every metric is a particular lens on that exchange. Before calculating, define the asset, currency, price basis, inflation convention, tax jurisdiction, timeline and ownership boundary. Does CAPEX include the grid connection, development fee, land, VAT, financing fees and interest during construction? Does production stop at gross generator output, plant meter or revenue meter? Does revenue include certificates, capacity or ancillary services? Two models with different boundaries can both be internally correct and.
- 02
Revenue to Free Cash Flow
Price × MWh, contractual adjustments, EBITDA, depreciation, interest, taxes, operating/free cash flow.
Depreciation allocates capitalised asset cost over accounting/tax lives. It is non-cash in the current period but reduces taxable profit where deductible. Interest may be deductible subject to national limitations. Tax losses may carry forward under rules. The tax model should separate accounting depreciation, tax depreciation, interest deductibility, loss carryforwards, withholding, VAT and transaction taxes. A flat tax rate applied to EBITDA is usually wrong. Deferred tax and accounting presentation can matter for valuation but cash-tax timing is central to project cash flow. Always obtain jurisdiction-specific advice; educational formulas cannot settle tax treatment. Unlevered project free cash flow measures cash generated by the asset before financing: operating cash after tax and investment. Levered equity cash flow subtracts debt service and adds debt drawdowns. The two streams support different IRRs. Construction years usually show negative project cash flow. Operating years show revenue minus OPEX, tax, working capital and sustaining CAPEX. Decommissioning cost and residual value belong at the end if material and legally supportable. Do not include debt principal as a project cost when calculating project IRR; it is financing. Do include it in equity cash flow. Interest treatment depends on metric.
- 03
Investment Metrics
LCOE, discounting, NPV, project IRR, equity IRR and payback, with limitations.
Loan life coverage ratio is the NPV of forecast CFADS over remaining loan life divided by outstanding debt, discounted at the defined rate: It measures lifetime coverage, while DSCR measures each period. A project can have acceptable LLCR but a near-term DSCR shortfall due to timing. Debt service reserve accounts can bridge limited timing issues but do not cure structural underperformance. Debt sculpting sets principal so projected debt service follows CFADS at a target DSCR. If target is 1.30x and CFADS is EUR 13 million, maximum debt service is EUR 10 million for that period. Interest is paid first and remaining capacity amortises principal. Circularity arises because interest depends on debt balance and debt size depends on CFADS/coverage. Models solve iteratively or with controlled formulas. Avoid hidden circular references. Sculpting against a base case can produce weak downside coverage. Lenders size to P90, contracted or other conservative cases and run sensitivities. Single-variable sensitivities show model mechanics: CAPEX +10%, production -5%, price -15%, delay one year, OPEX +10%, interest +200 bps. Real downside combines correlated effects. A delay can increase CAPEX, interest and lost revenue. Poor resource can coincide with low.
- 04
Debt and Downside
Sources/uses, leverage, debt service, DSCR, LLCR, covenants and integrated sensitivities.
Enterprise value is the value of operating/project cash flows before financing claims. Equity value bridges enterprise value to shareholders by subtracting net debt and adding/subtracting other debt-like or non-operating items. In a project SPV, reserve accounts, shareholder loans, working capital and contingent liabilities can materially affect the bridge. An acquisition model may use discounted cash flow, comparable EUR/MW transactions or development-milestone value. EUR/MW is a shorthand, not a valuation method unless normalised for technology, stage, grid, permits, CAPEX remaining, yield, contract and liabilities. Two 100 MW projects can differ radically. At development stage, value reflects probability-weighted rights and remaining cost, not operating EBITDA. At RTB, critical permits and grid rights may reduce risk but construction/financing remain. At COD, operational evidence exists but defects and ramp-up matter. Transaction price and project NPV differ because buyers have different financing, tax, synergies and return requirements. A seller can achieve a premium for scarce pipeline or contracted revenue. The model should show standalone value and buyer-specific adjustments separately. An integrated downside combines causal variables. A six-month delay raises CAPEX by 5%, adds financing cost and removes half-year revenue. Lower resource reduces MWh and may.
Key takeaways
What should remain after the details.
- cash timing defines investment.
- EPC price is not total cost.
- capacity does not equal energy/revenue.
- EBITDA is not distributable cash.
- later cash is worth less.
- lowest cost need not mean highest value.
- leverage magnifies upside/downside.
- covenant headroom matters before average return.
Correct the shortcut
Common misconceptions
- Equipment price equals CAPEX
- This shortcut is incomplete; apply the module’s definitions, system boundary and operating constraints before drawing a conclusion.
- MW×8,760 equals sold energy
- This shortcut is incomplete; apply the module’s definitions, system boundary and operating constraints before drawing a conclusion.
- EBITDA equals cash
- This shortcut is incomplete; apply the module’s definitions, system boundary and operating constraints before drawing a conclusion.
- depreciation is cash
- This shortcut is incomplete; apply the module’s definitions, system boundary and operating constraints before drawing a conclusion.
- LCOE is required sale price/value
- This shortcut is incomplete; apply the module’s definitions, system boundary and operating constraints before drawing a conclusion.
Worked reasoning
Sensitivities and scenarios
Single-variable sensitivities show model mechanics: CAPEX +10%, production -5%, price -15%, delay one year, OPEX +10%, interest +200 bps. Real downside combines correlated effects. A delay can increase CAPEX, interest and lost revenue. Poor resource can coincide with low capture or curtailment. Report impact on NPV, project/equity IRR, minimum DSCR, LLCR and cash deficit. Show break-even price, production or CAPEX where useful. Do not hide covenant failure behind a tolerable average return. Scenario governance labels base, upside and downside, sources probabilities carefully, and avoids calling P90 a universal 90% financial confidence.
Concept map
The vocabulary this module connects.
- Development/construction CAPEX
- fixed/variable OPEX
- production
- availability
- losses and working capital.
- Price × MWh
- contractual adjustments
- EBITDA
- depreciation
- interest
- taxes
- operating/free cash flow.
- LCOE
- discounting
- NPV
- project IRR
- equity IRR and payback
- with limitations.
- Sources/uses
- leverage
- debt service
- DSCR
- LLCR
- covenants and integrated sensitivities.
Evidence boundary
Selected authoritative sources
Research reviewed 2026-08-13. The complete learning package contains the full reference trail and explains where simplified beginner models stop.
- IEA, Levelised Cost of Electricity CalculatorResearch source used in the Economics of a Power Plant learning package
- IEA, Projected Costs of Generating ElectricityResearch source used in the Economics of a Power Plant learning package
- IEA, techno-economic inputsResearch source used in the Economics of a Power Plant learning package
- IRENA, Renewable Power Generation Costs in 2024Research source used in the Economics of a Power Plant learning package
- EIB, Economic Appraisal of Investment ProjectsResearch source used in the Economics of a Power Plant learning package
Questions answered
Economics of a Power Plant FAQ
How does a power plant make money?
Economically, a power plant is a large investment today in exchange for MWh and cash flows over the next 20-30 years.
Why does economics of a power plant matter to energy professionals?
Developers budget funding engineers define production traders model achieved price
What will I learn in this Economics of a Power Plant module?
You will connect Development/construction CAPEX, fixed/variable OPEX, production, availability, losses and working capital.; Price × MWh, contractual adjustments, EBITDA, depreciation, interest, taxes, operating/free cash flow.; LCOE, discounting, NPV, project IRR, equity IRR and payback, with limitations.; Sources/uses, leverage, debt service, DSCR, LLCR, covenants and integrated sensitivities..
What remains inside the complete learning module?
The complete module contains the full readings, guided decisions, feedback, mastery assessment and professional challenge, with progress recorded in the learner experience.
Learn, apply, test
Reading is only the beginning.
The complete module adds guided decisions, feedback, a mastery assessment and a professional challenge. Your progress remains in your learner dashboard.