Buildable is not bankable: why so few renewable projects reach financial close — and fewer still perform

Australia's "probable" renewable pipeline reached roughly 32 GW in 2025, yet only about 2.3 GW of new generation reached financial close that year — a 46% fall on the prior year, according to the Clean Energy Council. The projects that do get built then face a second gap: solar assets have historically underperformed their P50 generation forecasts by 7–13%, and roughly a third of wind projects have missed P50 by 15% or more. The energy transition is not short of ambition or capital. It is short of the financial discipline that turns a buildable project into a bankable one — and a built asset into a performing one.

The first gap: a record pipeline that won't convert

On paper, the Australian transition has never looked healthier. The Clean Energy Regulator's pipeline tracker pushed past 32 GW of "probable" generation capacity in 2025 — the largest surge on record — as successive Capacity Investment Scheme tenders added volume.

The conversion tells a different story. Committed projects — those that have reached a final investment decision or begun construction — sat at around 7.4 GW in May 2025. The gap between probable and committed capacity widened to roughly 24,900 MW, the widest in the Regulator's dataset. In the first half of 2025, just 1,173 MW of new utility-scale generation was committed — about a third of the run-rate the Clean Energy Council estimates is needed to hold the 2030 target — and not a single onshore wind farm reached commitment until the final weeks of December. Financial-close activity was reported to be its weakest since 2016.

A late rally — five projects and 1.2 GW in the fourth quarter, more than the previous three quarters combined — closed the year on a better note. But it closed off a very low base, and it does not change the structural point: a contract award is not a financed project. Between the two sit grid-connection agreements, planning approvals, financing arrangements and offtake contracts, and the pipeline has been growing far faster than the machinery that converts contracts into construction. The Regulator's own modelling suggests only 6–16 GW of the current pipeline may reach a final investment decision by the end of 2027.

This is where projects are actually lost — not at the ambition stage, but at the point where an investment committee, a lender's credit team or an offtaker interrogates the numbers and the answers do not hold.

The second gap: the assets that do get built underdeliver

Reaching financial close is only the first test. The harder one is whether the asset performs to the investment case it was financed on — and the evidence is sobering.

Independent performance data has shown solar assets consistently generating below their pre-construction P50 forecasts: kWh Analytics' Solar Generation Index has put underperformance at 7–13% for projects built after 2015, with both tracker and fixed-tilt systems producing around 8% less than their financing pro formas assumed. Fitch's analysis of a global portfolio found solar 5–10% below P50 and, more starkly, roughly one-third of wind projects underperforming P50 by at least 15%.

Then there is the revenue side, which is deteriorating faster than the generation side. The IEA reports curtailment volumes rose around 55% in 2024, and the number of negative-price hours has surged across markets as solar peaks collide with low demand. In Australia's National Electricity Market, curtailment and marginal loss factors quietly erode the revenue a project actually captures, and merchant and even contracted assets are exposed: a project is not paid for energy it is directed not to produce. Capture prices — the average price at which wind and solar actually sell — increasingly sit below the levelised cost the asset was financed against.

The result is a widening gap between the model and the meter. An asset can be engineered perfectly and still miss its return, because the assumptions it was financed on — resource yield, curtailment, capture price, offtake — were never stress-tested against how the grid and the market actually behave.

Why this is a financial-discipline problem

Both gaps share a cause. The path to financial close, and the path to a performing asset, are governed by financial assumptions that are too often optimistic, unmodelled, or disconnected from the capital structure.

Overstated P50s and understated curtailment inflate the revenue line. Offtake and merchant exposure are treated as a marketing question rather than a credit one. Capital structures are set before the revenue quality is understood. Development spend is committed before the connection and planning risks that most often kill a project are priced. None of these are engineering failures. They are failures to build the investment case on assumptions a lender, an investment committee or an acquirer can interrogate and still finance.

That is precisely the discipline a finance-led adviser brings — and precisely what the current pipeline is missing at scale.

What finance-led energy transition advisory does about it

Lever Impact approaches the energy transition as a corporate finance problem with a sustainability dimension, not the reverse. As chartered accountants working at the intersection of corporate finance and sustainability, we focus on the two gaps that decide outcomes:

The point is not to be more cautious. It is to be more defensible — so that the capital deployed into the transition is deployed into projects that close and assets that perform.

Who this is for

This is a standard set for the people accountable for the capital: developers seeking a route to financial close that survives diligence, fund managers and capital allocators pricing revenue quality and curtailment risk before they commit, and boards and CFOs whose transition investments must earn their return under real grid and market conditions.

If you are deploying capital into the energy transition and need the investment case to hold — at financial close and at the meter — let's talk. Explore our energy transition, capital advisory and investment solutions capabilities, or read our related piece on delivering bankable renewable energy projects.