Revenue Swap Agreements
Financing utility-scale battery storage in Australia has one structural prerequisite as revenue certainty. Banks will not lend against volatile merchant revenue at the scale that grid-scale battery infrastructure requires. Without a contractually fixed income stream covering the debt tenor, even the strongest BESS project cannot satisfy the debt service coverage ratio that senior lenders apply. A revenue swap agreement is the instrument that resolves that constraint and moves your development to financial close.
Basis Energy works with project stakeholders across Australia to structure energy storage financial contracts that support bankable outcomes. If your battery project is working towards project finance, a revenue swap may be exactly the mechanism that gets you there. Our services are designed for corporate and project-level clients, including energy developers, infrastructure investors and asset owners, not individual investors.
The Revenue Certainty Problem in Battery Infrastructure
Battery Energy Storage Systems (BESS) earn revenue through multiple market services, including frequency control ancillary services (FCAS), energy arbitrage and emerging system strength services. The challenge is that these revenue streams are highly variable. Spot prices shift. Market conditions change. Lenders, understandably, are not comfortable funding assets with volatile income.
This revenue certainty problem sits at the core of almost every major financing challenge in battery infrastructure today. Without a mechanism to smooth or stabilise projected cash flows, even well-designed projects can struggle to attract debt. Developers often end up in a frustrating cycle: the project is technically viable, the market opportunity is real, but financing will not move until revenue risk is managed.
Energy storage financial contracts, and specifically revenue swaps are designed to fill this gap. They do not eliminate market exposure entirely, but they convert unpredictable income into a structure that lenders can underwrite with confidence. If you are exploring options for your battery project, understanding this instrument is a useful starting point. Get in touch to structure a bankable revenue solution for your battery project.
What Is a Revenue Swap Agreement in Energy Markets
A revenue swap agreement is a bilateral financial contract under which one party pays a fixed periodic amount, the Fixed Amount, and the other party pays or receives the difference between that fixed amount and the actual market revenues the asset earns. Under Australian market practice, these agreements are structured as derivative instruments under the ISDA 2002 Master Agreement framework with an AFMA Electricity Addendum.
In practice, it works like this. Your battery project dispatches into the NEM and earns variable revenues from energy arbitrage, FCAS, and other market services. Each settlement period, Basis Energy pays you a contracted Fixed Amount regardless of what the market delivers. If actual NEM revenues exceed the Fixed Amount, you pass the surplus to Basis. If revenues fall short, Basis absorbs the difference. The result is a stable, contracted income stream that your project can take to a lender.
The reference index under a revenue swap is the total revenues your specific asset earns within the NEM — not a single market service, not a notional benchmark. This makes the structure well-suited to battery storage, which earns across multiple revenue streams simultaneously.
How Revenue Swaps Enable Bankable Battery Projects
Project finance for energy infrastructure centres on one key concept: the ability to service debt. Lenders model debt service coverage ratios, stress-test cash flows, and scrutinise revenue risk above almost everything else. A battery project relying entirely on merchant market revenues will rarely satisfy those requirements without additional credit support. Revenue swaps address this directly:
A revenue swap converts variable NEM revenues into a contracted Fixed Amount that senior lenders can underwrite across the full debt tenor.
Lenders model debt service coverage ratios against a dependable baseline, supporting appropriate debt sizing without conservative merchant haircuts.
With revenue certainty in place, conditions precedent become more tractable and the timeline from financing mandate to financial close compresses meaningfully.
The pricing of that Fixed Amount is not a spreadsheet estimate. Basis Energy's proprietary Vol-OS engine uses physics-informed, scenario-based dispatch modelling to price each swap against your specific asset, accounting for your project's location, connection point, cycling profile, and degradation trajectory across forward NEM conditions. The result is a Fixed Amount that lenders and equity partners can interrogate with confidence, knowing it reflects a rigorous, asset-specific assessment of your project's revenue profile rather than a market average. To understand how this applies to your transaction, contact our team to discuss your options.
Revenue Swaps vs Traditional Offtake Agreements
Understanding where revenue swaps sit in the market requires following the evolution of battery storage contracts from the beginning.
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Power purchase agreements were never the right instrument for batteries. A PPA commits a buyer to purchase a defined volume of energy at a set price, it is designed for generation assets with predictable, unidirectional output. A battery does not simply generate and sell electricity. It charges, discharges, responds to frequency events and optimises across multiple market services simultaneously. Fitting a BESS into a PPA structure either fails to capture the full revenue picture or constrains the asset's ability to optimise across markets.
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Tolling agreements became the battery-specific answer. Under a tolling structure, a retailer contracts the battery for a fixed periodic fee, takes full dispatch rights, and trades the output itself. From the developer's perspective, the revenue is certain and the retailer pays regardless of market outcomes. The problem is on the retailer's side. Under AASB 16 and its international equivalent IFRS 16, a tolling agreement over a dedicated asset is capitalised on the counterparty's balance sheet as a right-of-use liability. At the scale of a 250MW or 500MWh asset over a 10 to 15 year term, that is a material balance sheet commitment. The major gentailers, AGL, Origin, and EnergyAustralia, are not willing to take that exposure across a pipeline of third-party BESS assets, particularly when they are pursuing their own battery build programmes simultaneously.
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Virtual tolling agreements emerged as a structural response. The commercial logic of a tolling arrangement is preserved, the developer receives a predictable fixed payment, but the settlement is restructured as a financial contract rather than a physical dispatch right. This avoids the on-balance-sheet treatment that makes physical tolling unattractive to large counterparties. Virtual tolling has gained traction but remains limited in availability, and the counterparties willing to write them at scale are few.
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Revenue swaps go one step further. Because the agreement settles as a derivative, referencing revenues rather than conferring physical control over the asset, it does not create the balance sheet exposure that made physical tolling problematic. The counterparty is exposed to market performance, not asset control. For developers, this structure delivers the revenue certainty that project finance requires without the constraints of a physical dispatch arrangement. For counterparties with the right mandate, it offers access to NEM revenue dynamics as a structured financial exposure rather than an operational commitment.
The practical result is that revenue swaps fill the structural gap that the gentailer withdrawal from tolling and offtake has created, providing contracted revenue certainty through a structure that works for both sides of the transaction.
Revenue Swaps in the Australian National Electricity Market
The National Electricity Market (NEM) is one of the most dynamic electricity markets in the world. Managed by the Australian Energy Market Operator (AEMO), the NEM spans Queensland, New South Wales, the Australian Capital Territory, Victoria, South Australia, and Tasmania, connecting generators, storage assets, and consumers across the eastern seaboard.
For battery energy storage systems operating within the NEM, revenue opportunities are genuinely significant but so is revenue volatility. FCAS markets can deliver strong returns during periods of frequency deviation, while energy arbitrage revenue depends heavily on the spread between off-peak and peak pricing. These conditions can be highly profitable, but they are not consistent enough on their own to satisfy institutional lenders.
Energy developers in Australia are increasingly structuring revenue swaps to resolve this challenge. As more grid-scale battery projects move through development pipelines, the appetite among trading houses, financial counterparties, and specialist platforms for structured electricity market revenue swap arrangements continues to grow.
For institutional investors at private credit funds, global reinsurers, and superannuation funds, the NEM's structural volatility is not simply a risk to be managed. It is a source of uncorrelated yield. Revenue dynamics in the NEM carry zero beta to equity markets, meaning returns are structurally independent of broader market movements. For capital seeking risk-adjusted returns outside traditional asset classes, a revenue swap backed by physics-based pricing offers precisely that exposure.
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Frequently Asked Questions
Still have questions? Take a look at the FAQ or reach out anytime. If you’re feeling ready, go ahead and apply.
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A revenue swap agreement is a bilateral financial contract that exchanges a contracted Fixed Amount for the variable market revenues a battery energy storage system generates within the NEM. Each settlement period, the developer receives the Fixed Amount regardless of market outcomes — converting unpredictable merchant revenue into a stable, contracted income stream.
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Senior lenders model debt service coverage ratios against projected cash flows. A battery project earning volatile merchant revenues cannot reliably demonstrate the coverage ratios that project finance requires, regardless of its technical quality or market opportunity. Revenue certainty is the structural prerequisite for accessing debt at the gearing levels that make utility-scale battery development viable.
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By converting variable NEM revenues into a contracted Fixed Amount, a revenue swap gives senior lenders a dependable baseline to model debt service coverage ratios against. This supports appropriate debt sizing without conservative merchant haircuts, makes conditions precedent more tractable, and compresses the timeline from financing mandate to financial close.
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Power purchase agreements are designed for generation assets — they reference a fixed energy volume and price, which does not suit the multi-stream revenue profile of battery storage. Tolling agreements are better suited to batteries but require the counterparty to capitalise the contract on their balance sheet under AASB 16, which the major gentailers are unwilling to do at scale. A revenue swap settles as a derivative referencing total asset revenues, avoiding the balance sheet issue entirely while delivering contracted revenue certainty for the developer.
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Project finance lending decisions are built around the certainty of debt repayment, not the upside of market performance. Banks stress-test cash flows against downside scenarios and require a minimum debt service coverage ratio to be maintained across the full debt tenor. A contracted Fixed Amount provides the floor that makes those coverage tests passable — merchant revenues alone do not.