How a Renewable Energy Project Gets Financed
The financeability of a solar or wind plant depends less on its technology than on how clear it is who will buy its electricity, at what price, and for how long.
Financing starts with the revenue contract
The lender's first question is who the plant will sell its electricity to, and how secure that sale is. A government feed-in tariff, a bilateral power purchase agreement (PPA), or merchant market sales each carry a different risk profile.
The contract term directly limits the loan tenor. If there is a ten-year feed-in tariff, the debt has to be structured so most of it is repaid within that decade.
Grid connection and permitting risk
The most common source of delay in renewable projects is grid connection capacity and the timing of the connection agreement. The lender wants independent confirmation of when the connection will be ready.
Permitting risk is handled similarly: environmental impact assessment, land-use permits and the grid operator's approval are each listed as separate conditions precedent to drawdown.
Production forecasts and P50/P90
How much a plant will generate is not certain but a statistical forecast. P50 is the scenario where production has a 50% chance of exceeding that level; P90 is the more conservative scenario where there is a 90% chance of exceeding it.
The lender tests debt service against the P90 scenario. Investor returns are usually calculated on P50, but the debt's serviceability is built around the more pessimistic case.
Currency matching
If revenue is in local currency and the debt is in foreign currency, FX risk directly threatens the project's ability to service debt. This mismatch is closed either through a contract that generates foreign-currency revenue or through hedging instruments.
Development finance institutions often offer local-currency lending options; this raises cost somewhat but removes the project's currency risk.
How support mechanisms affect the structure
Support mechanisms that provide a fixed-price guarantee are treated by lenders much like a revenue contract, and they increase the project's borrowing capacity for as long as they last.
Revenue assumptions for the period after support expires are built far more conservatively; that transition point is the most carefully designed part of the financing structure.
Energy and Natural ResourcesIn energy, financing is only as sound as the strength of the revenue contract and the clarity of the risk allocation.
Learn moreFrequently asked questions
What is a typical debt-to-equity ratio for a renewable energy project?
It depends on the strength of the revenue contract; projects with a strong, long-term offtake guarantee can reach a debt share of up to 70-80%, while projects without a contract or with a short-term one see that share drop markedly.
Why does the gap between P50 and P90 matter?
P50 shows average expected production, while P90 shows the conservative production level that will be exceeded even in a low-probability scenario. The lender wants to see debt can be serviced even under that more pessimistic case.
What happens if the grid connection is delayed?
A connection delay usually postpones drawdown; the financing structure treats finalisation of the connection agreement as a condition precedent to the loan.
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