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PPA Mechanics · Structures
Corporate PPA UK: Commercial Solar PPAs Explained
A corporate PPA is a long-term bilateral contract signed directly between a large electricity user and a solar generator, bypassing the standard supplier tariff for utility-scale renewable output.
What is a corporate PPA in the UK?
A corporate PPA (CPPA) is a direct bilateral contract between a large electricity off-taker and a solar generator or IPP, for utility-scale output (typically 5MWp+). Terms run 10-20 years at a fixed or partially-indexed price of roughly £42-60/MWh, and almost always require an investment-grade covenant.
Key takeaways
- A corporate PPA is signed direct with the generator (or its SPV/IPP) rather than through a supplier's standard tariff — the corporate becomes a counterparty, not just a customer.
- It can be physical (power flows to your meters, usually sleeved by a supplier) or financial/virtual (a contract-for-difference with no physical delivery).
- Most CPPAs need an investment-grade off-taker or parent guarantee because the generator's project finance is underwritten against your 10-20 year payment covenant.
- Pricing is keyed in £/MWh — roughly £42-60/MWh fixed — not the pence-per-kWh used for on-site rooftop deals.
- REGO transfer and additionality drafting decides whether you can credibly claim the renewable electricity against Scope 2.
What makes a corporate PPA different from any other PPA
Most of the structures on our PPA structures hub describe how a generator funds kit and sells you the output. A corporate PPA (CPPA) is defined not by where the panels sit but by who signs the contract and against what scale. It is a bilateral agreement struck directly between a single large off-taker and a generator or independent power producer (IPP) for the output of a utility-scale asset — typically a 5MWp-plus ground-mounted solar farm, and frequently far larger.
The distinction matters commercially. On a rooftop on-site PPA you are a customer buying kWh from kit on your own building. On a corporate PPA you become a counterparty on a long-dated energy contract. The generator's lenders treat your signature as a credit instrument: the project's debt is sized and priced against your contracted offtake, so the contract reads more like a financing document than an energy bill. That is why CPPAs are the preserve of FTSE 100/250 corporates, major retailers, banks and insurers rather than single-site SMEs.
A corporate PPA can be physical (electrons are delivered to your meters) or financial (a purely contractual hedge with no delivery). It can be on-site or, far more commonly, off-site — generation at a remote solar farm with the commercial benefit routed to you. This flexibility is exactly why the term causes confusion: "corporate PPA" is a contracting model, not a single technical setup.
Who signs corporate PPAs — and why they bypass the supplier
The off-taker profile is consistent across the UK market: organisations large enough to consume tens of GWh a year, with a treasury function and a public decarbonisation commitment. In practice that means investment-grade corporates, supermarket and retail estates, data-centre and technology operators, and financial institutions.
Why go direct rather than just buy a green tariff from a supplier? Three reasons recur:
- Price certainty over a decade-plus. A fixed or lightly-indexed £/MWh strike removes wholesale volatility from a material cost line — something a standard supply contract, which reprices every 1-3 years, cannot offer.
- Genuine additionality. Buying REGO-backed power direct from a named new solar farm is a far stronger sustainability claim than a green tariff assembled from traded certificates. It is the difference between funding new capacity and re-labelling existing supply.
- Scale the supplier cannot price. When a single user wants 20-100MW of dedicated renewable output, the cleanest route is to contract the asset's whole production rather than ask a supplier to source it on the open market.
The trade-off is complexity: you take on balancing, shaping and covenant obligations that a supplier would otherwise absorb. For organisations below roughly £500k of annual electricity spend, that overhead rarely pays back — which is why our structures hub flags sub-£500k spenders as the wrong fit for this route.
Physical vs financial: the two corporate PPA routes
Every corporate PPA resolves into one of two settlement mechanics, and choosing between them is the first decision in any CPPA process.
| Feature | Physical (sleeved) CPPA | Financial (virtual / synthetic) CPPA |
|---|---|---|
| Delivery | Power flows to your meters; a licensed supplier "sleeves" and balances it | No delivery — a contract-for-difference against a wholesale reference price |
| Your supply contract | Stays in place; the sleeve sits on top | Unaffected; you keep buying power as normal |
| Accounting | Largely an operating cost | Derivative — needs IFRS 9 hedge-accounting treatment |
| Best for | Single-country estates wanting real electrons + REGOs | Multi-site or multi-jurisdiction corporates hedging price |
The physical route keeps the renewable claim clean because you receive both the power and the REGO certificates attached to it. The financial route — covered in depth on our virtual PPA explainer — separates the money from the megawatt-hours entirely, which suits a corporate hedging price exposure across estates a single sleeve could never reach. Most UK headline deals you read about are off-site physical CPPAs sleeved by a supplier; the financial structure is more common where the buyer operates across borders.
Typical corporate PPA terms in the UK
Corporate PPAs are quoted in £/MWh, not the pence-per-kWh used for small rooftop deals — a tell that you are in utility-scale territory. Indicative UK terms in 2026 look like this:
| Parameter | Typical corporate PPA |
|---|---|
| Contract term | 10-20 years (occasionally 25 on the largest assets) |
| Price band | £42-60/MWh, fixed or partially indexed |
| Escalator | Usually fixed; occasionally CPI-linked |
| Minimum scale | ~5MWp+; headline deals run to tens of MW |
| Off-taker requirement | Investment-grade or parent guarantee |
The term is long because the generator's debt amortises over the asset's life and the lender wants the offtake locked for most of that period — the same IRR mathematics we set out on the PPA term page. A shorter term is negotiable but you pay for it in a higher strike. Note how far below grid import these strikes sit: a £45-55/MWh corporate strike is 4.5-5.5p/kWh against the 28-32p most commercial users pay to import, which is the entire economic case for going direct. The price you are actually offered turns heavily on your covenant and the shape of your demand — both covered next. For the full picture of what moves a strike, see the PPA pricing benchmarks.
Covenant, REGO and additionality: where deals are won or lost
Two clauses decide whether a corporate PPA is bankable and whether it delivers what the sustainability team promised the board.
The off-taker covenant. Because the generator's lenders are effectively lending against your future payments, your credit rating sets the floor on the deal. An investment-grade balance sheet, or a guarantee from an investment-grade parent, is usually a precondition — and a stronger covenant buys a keener strike. If your standalone entity is thin, the route forward is a parental guarantee or a credit-support package. We unpack the underwriting logic in detail on the off-taker covenant page; for a corporate PPA it is not a footnote, it is the gating item.
REGO transfer and additionality. A solar farm produces both electricity and Renewable Energy Guarantees of Origin (REGOs). The contract must state explicitly that REGOs transfer to you, in the volume and vintage you need, or your renewable claim is hollow. For a credible additionality story — funding genuinely new capacity rather than re-papering existing generation — the asset should be newly built or recently energised and the certificates ring-fenced to your offtake. Get this drafting right and the CPPA stands up to SBTi and TCFD scrutiny; get it wrong and you have bought cheap power with no defensible green claim.
Curtailment and shape risk
Solar generates on a daytime, seasonal curve that rarely matches your demand exactly. The contract must allocate who carries the cost when generation exceeds your need (export/curtailment) or falls short (top-up from the grid). On a physical sleeve the supplier shapes this; on a financial CPPA the basis between the settlement node and your import meter is yours to manage.
Who offers corporate PPAs in the UK
It is worth being precise about who sits on the other side of a corporate PPA, because the market is layered. Utility-scale CPPAs are originated by independent power producers and developers who build and operate the solar farms and contract the output directly — the segment behind most headline deals. Larger off-takers may also transact through utility and supplier corporate-PPA desks that sleeve and balance the power, or through infrastructure-fund-backed SPVs that own the asset on institutional capital. Our providers overview sets out each provider type, the deal sizes they serve and the structures they favour.
On the buyer side, the UK has a growing roster of publicly-reported corporate renewable PPA off-takers. Amazon is repeatedly reported as the world's largest corporate buyer of renewable energy, with a UK and European solar and wind PPA portfolio. Supermarket groups including Tesco, Sainsbury's and Marks & Spencer have publicly contracted large-scale UK solar via long-term agreements, while Nestlé UK and IKEA combine on-site solar with off-site corporate PPAs. These are drawn from each company's own sustainability disclosures and are illustrative of the buyer profile — we are an independent advisory layer, not a party to any of them. Our anonymised case studies show the same mechanics at the sizes most off-takers actually sign.
Is a corporate PPA right for your organisation?
A corporate PPA is the right structure when scale, covenant and ambition all line up. It is the wrong one when they don't — and forcing it wastes months of legal cost.
- You consume tens of GWh a year and want to lock a material slice of cost for 10-20 years.
- You are investment-grade, or can offer a parent guarantee, and have a treasury function to manage the contract.
- You need a defensible additionality and REGO story for SBTi, TCFD or Scope 2 reporting.
- Your annual electricity spend comfortably exceeds £500k, so the legal and balancing overhead pays back.
If you are a single-site business with a good roof, an on-site PPA will almost always be simpler, cheaper per kWh and quicker to sign. If you are multi-site but not ready to take on a derivative, a sleeved physical deal sits neatly between the two. And if your driver is purely a price hedge across a complex estate, weigh the financial route — the corporate vs utility PPA comparison is the right next read. Whichever way you lean, the route to a sensible decision is a provider-neutral conversation about your covenant, demand shape and reporting needs before anyone drafts a term sheet.
Tell us your consumption and reporting goals and we will set realistic expectations and introduce you to vetted providers matched to your scale — or talk it through first via our contact page.
FAQs
Frequently asked questions
Is a corporate PPA the same as a virtual PPA?
Not quite. A corporate PPA is the umbrella term for a bilateral deal signed direct with a generator. A virtual (synthetic) PPA is one financial form of corporate PPA — a contract-for-difference with no physical delivery. A corporate PPA can equally be physical, with power sleeved to your meters.
What size do you need to be to sign a corporate PPA?
Realistically you need utility-scale offtake — around 5MWp and above of contracted output, tens of GWh of annual consumption, and electricity spend comfortably over £500k a year. Below that the legal, balancing and covenant overhead rarely pays back, and an on-site or sleeved PPA fits better.
What is a typical corporate PPA price and term in the UK?
UK corporate PPAs typically run 10-20 years at roughly £42-60/MWh, fixed or partially indexed — about 4.5-6p/kWh against the 28-32p commercial users pay to import. The exact strike depends on your covenant strength, contract length and how well your demand matches a solar generation curve.
Why do corporate PPAs require an investment-grade covenant?
The generator funds the solar farm with project debt that is sized against your future payments, so lenders treat your offtake as credit support. An investment-grade rating, or an investment-grade parent guarantee, is usually required — and a stronger covenant earns a keener price. See the off-taker covenant page for the underwriting detail.
Which UK companies have signed corporate solar PPAs?
Publicly-reported UK corporate PPA buyers include Amazon, Tesco, Sainsbury's, Marks & Spencer, Nestlé UK and IKEA, drawn from their own sustainability disclosures. These illustrate the buyer profile; SPPA is an independent advisory and matching service and is not a party to those deals.
Do I get the renewable certificates with a corporate PPA?
Only if the contract says so. The agreement must explicitly transfer the Renewable Energy Guarantees of Origin (REGOs) in the volume and vintage you need. Getting this drafting right — alongside an additionality story tied to a newly built asset — is what makes your Scope 2 and SBTi claim defensible.
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