PPA Mechanics · Structures

Virtual (Synthetic) PPA Explained

A virtual PPA is not an electricity contract at all — it is a long-dated financial hedge that settles against a wholesale price, leaving your physical supply arrangements completely untouched.

A financial hedge, not an electricity contract

The single most important thing to understand about a virtual PPA — also called a synthetic PPA, financial PPA or VPPA — is that no electricity is ever delivered to you under it. You do not switch supplier. Your import meter, your half-hourly settlement, your network charges and your monthly energy bills carry on exactly as before. The VPPA sits entirely alongside that physical world as a separate, purely financial instrument.

What you actually sign is a long-dated contract-for-difference (CfD) referencing the metered output of a specific renewable generator — usually a utility-scale solar farm developed by an independent power producer of the kind described on our PPA providers page. You agree a fixed strike price, typically £45–£55/MWh for UK solar, over a 10–15 year term. Each settlement period, the generator's output is valued at the prevailing wholesale price and compared to your strike. The difference is settled in cash. That is the whole mechanism: a financial wrapper that converts a floating wholesale exposure into a fixed one, without anyone moving an electron on your behalf.

This is why the VPPA is the most abstract of the six structures in our PPA structures hub. A physical or on-site corporate PPA changes where your power comes from. A virtual PPA changes nothing about your power — it changes your financial position against the wholesale market, and it hands you renewable certificates to underpin a green claim.

How the contract-for-difference settles

Settlement is the heart of the structure, so it is worth walking through the cash flows precisely. In any given period the generator's actual metered production (in MWh) is multiplied by the difference between your fixed strike and a defined wholesale reference price — usually the day-ahead market index or the generator's achieved capture price.

Scenario	Wholesale reference	Strike (fixed)	Cash settlement
Prices high	£90/MWh	£50/MWh	Generator pays you £40/MWh × volume
Prices at strike	£50/MWh	£50/MWh	Nil — the hedge is neutral
Prices low	£35/MWh	£50/MWh	You pay the generator £15/MWh × volume

The £50/MWh strike and £90/£35 references above are illustrative round numbers, not a quoted deal — they exist only to show the direction of cash flow. Read the table in the round and the logic snaps into focus. When wholesale prices spike, you are paying more on your physical bill — but the VPPA pays you a matching credit, so your blended cost is stable. When wholesale prices collapse, your physical bill falls, but you top up the generator to its strike. The CfD is therefore a two-way swap: it removes the upside and the downside of wholesale volatility, fixing your effective renewable cost at roughly the strike. It is a hedge, not a discount. It is not designed to beat the market — it is designed to take a view off the table for 10–15 years. For the day-one tariff context the strike sits within, see the PPA pricing benchmarks; this page does not repeat those tables.

Basis risk: the gap that breaks the hedge

If a VPPA were a perfect hedge it would be uncontroversial. It is not, and the reason is basis risk — the difference between the price at which the contract settles and the price you actually experience.

Two distinct mismatches create it. Locational basis arises because the generator settles against a wholesale node or index that is not the price feeding your import meter. In a market with growing locational and constraint effects, the day-ahead index your VPPA references can diverge from the cost embedded in your own supply contract. Shape (or profile) basis arises because a solar farm produces in a midday-weighted pattern that does not match your consumption shape; the achieved capture price for that solar profile can sit below the flat baseload index, so the hedge volume and your load volume drift apart.

• Settlement node vs your meter — the reference price is the generator's, not yours; the wider the geographic and contractual gap, the looser the hedge.
• Generation shape vs demand shape — solar's midday peak rarely mirrors a 24/7 industrial or data-centre load, so volume cancels imperfectly.
• Cannibalisation drift — as more solar is built, the capture price for solar hours falls relative to baseload, steepening shape basis over the contract life.

None of this makes a VPPA unworkable — it makes it a job for a team that can model the residual exposure, not eliminate it. The honest framing is that a virtual PPA converts a large, obvious wholesale risk into a smaller, subtler basis risk. That trade is worth making for a corporate with a treasury function to monitor it; it is a trap for anyone who assumes the word 'hedge' means 'risk-free'.

IFRS 9 hedge accounting and mark-to-market P&L

This is where virtual PPAs separate the genuinely sophisticated buyer from the merely enthusiastic one. Because no commodity is physically delivered to your own use, a VPPA generally fails the 'own-use' exemption and is treated as a derivative under IFRS 9. A derivative must be carried on the balance sheet at fair value, and that fair value is re-measured every reporting date.

The consequence matters enormously. Over a 10–15 year contract, forward wholesale curves move constantly. Each move changes the mark-to-market value of your VPPA — and unless you do something deliberate, every one of those swings flows straight through profit and loss. A finance director can find a quiet quarter disrupted by a large non-cash fair-value movement on a contract that has not yet settled a single penny. For a listed business, that volatility is precisely what TCFD-conscious boards do not want appearing unexplained in their results.

The remedy is to designate the VPPA as a cash-flow hedge and apply hedge accounting, which parks the effective portion of fair-value movements in other comprehensive income rather than P&L until the hedged exposure occurs. But that designation is demanding: you must document the hedge relationship at inception, demonstrate an economic relationship between the VPPA and a forecast electricity purchase, and prove hedge effectiveness on an ongoing basis. The very basis risk described above is what erodes effectiveness — if the settlement node and your load drift too far apart, the hedge becomes 'ineffective' and the ineffective portion lands back in P&L anyway.

• Confirm whether your VPPA qualifies for own-use exemption before signing — most do not.
• Decide at inception whether you will pursue cash-flow hedge accounting; retrofitting it is far harder.
• Stress-test the mark-to-market range your auditors and board will tolerate across the forward curve.
• Tie the effectiveness assessment back to the basis-risk model — they are the same question viewed from two directions.

If reading this section made your finance team uneasy, that unease is the correct response. The accounting is not a footnote on a VPPA — it is a primary design constraint that shapes whether the deal is even worth doing.

Who should sign one — and who absolutely should not

The right buyer for a virtual PPA is narrow and specific. It is a large, investment-grade corporate with an in-house treasury function, a multi-site or multi-jurisdiction footprint, and a public decarbonisation commitment that needs auditable backing. Tech and data-centre operators are the archetype: vast, geographically dispersed electricity demand that cannot all sit under one roof, balance sheets that can absorb derivative accounting, and TCFD and SBTi commitments that demand a Scope 2 lever with a paper trail. For these buyers the VPPA is genuinely elegant — one financial contract can green a whole portfolio of sites without touching a single roof.

Strong fit	Wrong fit
FTSE-listed corporates with treasury teams	SMEs with no derivatives capability
Data-centre and tech operators	Single-site businesses (on-site PPA is simpler and cheaper)
Multi-nationals with TCFD / SBTi targets	Charities and most public-sector bodies
Buyers wanting a portfolio-wide Scope 2 claim	Anyone uncomfortable with mark-to-market volatility

The wrong buyer is just as clearly defined. An SME without a treasury function has no business taking on a 15-year derivative it cannot account for, model or unwind. Charities and public-sector bodies typically face procurement rules that prohibit speculative-looking financial instruments, and rarely have the covenant strength a generator demands. For all of these, a physical corporate or on-site PPA delivers the same renewable kilowatt-hours with none of the accounting freight — and the corporate vs utility PPA comparison sets out where each physical route fits. The honest advice is often: if you have to ask whether a VPPA's accounting will be manageable, it will not be — choose a physical structure instead.

Certificates, the green claim and getting independent help

Because no power physically reaches you, the renewable attribute has to travel separately. A well-drafted VPPA transfers the generator's certificates — REGOs in the UK, or guarantees of origin in other jurisdictions — to you alongside the financial settlement. Those certificates are what let you report renewable electricity under the market-based method, support a Scope 2 reduction, and feed a credible TCFD disclosure. Without explicit certificate transfer in the contract, you have hedged a price but bought no green claim — a surprisingly common drafting failure.

That separation also makes additionality cleaner: a long-term VPPA underwriting a new solar farm can demonstrate that your money brought new capacity onto the grid, which is exactly the story a science-based-targets reviewer wants to see. The flip side is documentation rigour — the same precision the IFRS 9 designation demands also governs whether your green claim survives audit.

SPPA is an independent editorial and matching service, not a provider, installer or FCA-authorised broker. We do not execute VPPAs and we do not give regulated financial or accounting advice. What we do is explain the mechanics in plain terms, set realistic strike-price expectations, and introduce qualifying off-takers to vetted utility-scale developers for a disclosed referral fee. If you are weighing a virtual PPA against a physical structure, the most useful next step is to compare them side by side and pressure-test the accounting with your own auditors before going to market.

• Read the PPA structures guide to see how a physical bilateral deal differs from the synthetic route.
• Map your Scope 2 and TCFD requirements before deciding whether a financial structure is even necessary.
• When you are ready for a provider introduction, request indicative terms or contact us with your load and reporting profile.

FAQs

Frequently asked questions

Is a virtual PPA a real electricity contract?

No. A virtual (synthetic) PPA is a purely financial contract-for-difference. No electricity is delivered to you under it, and you keep your existing supplier and import arrangements unchanged. It settles in cash against a wholesale reference price.

What is the typical strike price for a UK virtual PPA?

UK solar VPPA strike prices typically sit in the £45–£55/MWh range on a 10–15 year fixed basis. The strike is the price your cash settlement is measured against, not a discount on your physical electricity bill. See our pricing page for full benchmarks.

What is basis risk in a virtual PPA?

Basis risk is the mismatch between the price your VPPA settles against (the generator's settlement node and solar shape) and the price you actually experience at your import meter. It is the structure's defining hazard and cannot be eliminated, only modelled and managed.

How is a virtual PPA accounted for under IFRS 9?

A VPPA is generally treated as a derivative under IFRS 9, carried at fair value with mark-to-market movements hitting P&L each period unless you designate it as a cash-flow hedge and prove ongoing hedge effectiveness. This is the most technically demanding part of the structure.

Should an SME sign a virtual PPA?

No. SMEs without a treasury function should avoid VPPAs. The derivative accounting, mark-to-market volatility and credit obligations outweigh the benefit. A physical on-site or corporate PPA delivers the same renewable power with none of the accounting complexity.

Do you get REGO certificates with a virtual PPA?

Only if the contract explicitly transfers them. Because no power physically reaches you, the renewable attribute must travel separately via REGOs or guarantees of origin. Without that drafting, you have hedged a price but acquired no Scope 2 or TCFD green claim.

Related on this site

• /mechanics/structure/ — How a physical corporate PPA differs from the synthetic route
• /compare/corporate-vs-utility-ppa/ — Bilateral corporate route compared with the utility-supplier route
• /mechanics/pricing/ — Strike prices and tariff bands by structure
• /compliance/tcfd/ — Using a PPA as an auditable Scope 2 lever
• /providers/ — Who develops the utility-scale solar behind a VPPA
• /quote/ — Request a provider-neutral introduction