Sleeved PPA: how a sleeved solar PPA works in the UK

A sleeved PPA lets a UK business buy the output of a named solar farm it does not own: the farm sits somewhere else, and a licensed electricity supplier delivers that generation to your meters as if it were ordinary supply. It is the main physical route for businesses that cannot, or will not, put panels on their own roof.

Sleeved vs on-site: where the power physically comes from

The defining feature of a sleeved PPA — also called an off-site PPA — is geography. With an on-site PPA a generator bolts panels to your own roof or land and you consume most of what is produced behind your meter. With an off-site PPA the generating asset is a solar farm that may be fifty or two hundred miles away, connected to the distribution or transmission network rather than to your building. None of those electrons reach you directly; what reaches you is a contractual and settlement arrangement that looks like the farm is powering your site.

That single difference cascades into everything else. Because the generation never enters your private wire, it is subject to the same network use-of-system charges, levies and supplier overheads as grid power. That is why the sleeved tariff band of 11–20 p/kWh in year one sits above the cheapest on-site and behind-the-meter bands — you are buying delivered power, not power that has dodged the grid. In exchange you gain something on-site can never offer: the ability to source renewable electricity for a building you do not own, a roof you cannot use, or a whole estate of meters from a single contract.

Benefits of a sleeved PPA for UK businesses

A sleeved PPA lets a UK business buy power from a named solar farm it does not own, at a long-term price, without building anything. The main benefits are budget certainty over the contract term, a REGO-backed Scope 2 claim, estate-wide cover from one contract, and no capital outlay.

• No capital outlay — the generator finances, owns and operates the farm. You are signing a power contract, not a construction contract, so nothing lands on your capital budget.
• Long-term price certainty — the generator tariff is agreed for the whole term, often with an escalator, which fixes the part of your unit price that moves most violently.
• No roof, no planning, no build programme — the asset already exists somewhere else, so leaseholders, tenants and businesses on shaded or structurally unsuitable buildings can still buy renewable power.
• One contract can cover a whole estate — sleeved volume is allocated across your MPANs, so a chain of small meters is served by a single deal instead of dozens of separate rooftop projects.
• A traceable green claim — REGOs from the named farm can be transferred to you and retired against your consumption, supporting a market-based Scope 2 claim. Ofgem issues one REGO per megawatt-hour of eligible renewable output.
• An additionality story — a long-term offtake can help finance a newly built farm, which is a stronger sustainability position than re-papering an existing asset's output.
• One supplier, one bill — sleeved volume and residual grid volume appear on the same invoice, so nothing changes operationally at the meter.

One boundary decides how large the benefit actually is. A sleeve replaces the wholesale layer of your unit price and adds a supplier service fee; network charges, policy costs and the Climate Change Levy carry on exactly as before, because the power still travels the public network to reach you. The next section breaks that stack down line by line.

REGO issuance: one certificate per megawatt-hour of eligible renewable output, administered by Ofgem for generation in Great Britain. Source: Ofgem — Renewable Energy Guarantees of Origin. Verified 26 Sep 2026.

What a sleeved PPA costs beyond the generator tariff

No UK supplier publishes a standard sleeving fee. It is quoted per deal — as a pence-per-kWh adder on sleeved volume or a fixed annual service charge — and it is often reset at each supply renewal. What you can price is everything around it, because a sleeve replaces only one layer of a delivered unit.

Read down the last column and the shape of the answer appears: one line is replaced, one is added, and everything else is untouched. Three questions settle any offer — is the sleeving fee stated separately from the generator tariff, is it fixed for the PPA term or reset at each supply renewal, and does the quoted price already include the network, policy and levy pass-through? What the fee pays for is unpacked in our explainer on what a sleeving fee covers.

Sources: National Grid Electricity Distribution — DUoS charging guide; NESO — TNUoS charges and NESO — Transmission Demand Residual guidance; NESO — BSUoS charges (CMP308 and CMP361, both from 1 April 2023); HMRC — Climate Change Levy rates. Verified 26 Sep 2026.

How sleeving actually works: the supplier in the middle

A sleeved PPA is a three-party arrangement. The generator owns the solar farm and wants a long, bankable contract for its output. You, the off-taker, want cheaper, greener power at your meter. Neither of you holds an electricity supply licence, so you cannot legally settle import at a meter point between yourselves. The licensed supplier bridges that gap — this is the 'sleeve'.

Mechanically, the supplier takes title to the solar farm's half-hourly output, registers it within its own balancing portfolio, and then bills you for your consumption with the sleeved volume credited against it at the PPA price. Where the farm generates more than you use in a given half-hour, the surplus is sold into the supplier's book; where it generates less, the supplier tops you up from the wholesale market. The supplier charges a sleeving fee (sometimes called a balancing or service fee) for carrying this risk and administration, which is why every sleeved tariff is quoted 'excluding supplier markup'.

1. Generation — the solar farm exports to the grid and meters its output half-hourly.
2. Title transfer — the supplier buys that output under a back-to-back arrangement with the generator.
3. Sleeving — the supplier matches the generation against your consumption across your MPAN(s).
4. Shaping & top-up — the supplier covers the shortfall when the sun is not shining and absorbs surplus when it over-generates.
5. Single bill — you receive one invoice showing sleeved kWh at the PPA rate plus residual grid volume at your supply rate.

Balancing, shaping and the imbalance problem

Solar generation is intermittent and your demand is not. A factory runs its presses at 7am in December when a solar farm is producing almost nothing; the same farm peaks at noon in June when half your workforce is at lunch. Reconciling those two profiles, half-hour by half-hour, is the supplier's core job and the reason sleeving is not free.

The contract will define how this mismatch is priced, and the wording matters enormously. In a firm (or 'shaped') sleeve the supplier guarantees to deliver an agreed volume profile and absorbs the cost of covering gaps — you pay a higher, more predictable rate. In a non-firm (or 'as-generated') sleeve you take the raw solar shape and the supplier passes imbalance charges through to you when the farm deviates from its forecast. Imbalance can swing violently: a cloudy afternoon the forecast did not predict can leave the supplier short in a tight balancing market, and in a pass-through structure that cost lands on your bill.

The clause to read twice. Whether imbalance risk sits with you or the supplier is the single largest variable in a sleeved PPA's real cost. A tariff that looks cheap on a non-firm basis can cost more than grid power in a volatile year. Always ask a prospective supplier to model your worst-case imbalance exposure, not just the headline p/kWh.

This is why the PPA rates page stresses that a sleeved p/kWh is only half the picture: the sleeving fee and the imbalance treatment together determine what you actually pay.

Sleeved PPA vs virtual (synthetic) PPA

A sleeved PPA is physical: a licensed supplier delivers a named solar farm's output to your meter and bills you for it. A virtual, or synthetic, PPA is financial: nothing is delivered, your supply contract is untouched, and you and the generator settle the difference against an agreed strike price.

The practical difference is who has to say yes. A sleeve cannot happen without a willing supplier, which makes supplier appetite the biggest gating item on a physical deal. A virtual PPA needs no supplier, but it does need a treasury function comfortable with hedge accounting and a mark-to-market position on the balance sheet — the mechanics are on our virtual PPA page, and the wider off-site picture on the off-site PPA guide.

Term bands are this site's indicative advisory bands — a guide to what is commonly proposed, not a surveyed market average.

Why off-site suits multi-site tenants and roofless estates

An on-site PPA needs three things you may not have: a roof or parcel of land you control, planning headroom, and a tenure long enough to outlast a 15-to-25-year contract. Plenty of substantial energy buyers have none of them. A retail chain leases its stores. A professional-services firm occupies three floors of a building it will never own. A university runs a split estate of listed halls and modern science blocks where only a fraction of roofs are viable. For all of these, an off-site sleeved PPA is often the only way to put a meaningful renewable volume behind the meter.

• Retail chains — dozens or hundreds of leased units, no single roof big enough, but a large aggregated load a solar farm can serve through one contract.
• Multi-site office tenants — leaseholders without roof rights who still carry a board-level net-zero commitment.
• Distribution networks — logistics operators whose roofs are leased or structurally unsuitable but whose half-hourly demand is large and steady.
• Universities with split estates — where conservation constraints rule out rooftop PV on much of the campus.

The flip side is administrative weight. A sleeved PPA carries supplier negotiation, balancing arrangements and REGO accounting that only make sense above a certain scale. As a rule of thumb the structure is hard to justify below roughly £100k of annual electricity spend, and small half-hourly sites under 100 kVA rarely clear the overhead. Below that threshold an on-site PPA or a simple green tariff is usually the better fit.

REGO certificates, additionality and what you can claim

The reason most off-takers sign a sleeved PPA rather than a standard renewable tariff is the claim — the ability to tell customers, investors and auditors that a specific, identifiable solar asset is powering the business. That claim rests on two things: the contractual sleeve and the REGO certificates (Renewable Energy Guarantees of Origin) that Ofgem issues for each MWh the farm generates.

In a well-drafted sleeved PPA the REGOs from the contracted farm are transferred to you and retired against your consumption, underpinning a market-based Scope 2 claim. Read the contract carefully: REGO ownership is negotiable and some suppliers retain or re-sell them, which would leave you paying a green premium without the right to the green claim. Equally important is additionality — whether your contract genuinely brought new solar capacity onto the grid. A long-term sleeved PPA that helped finance a newly built farm is a far stronger sustainability story than one that simply re-papers an existing asset's output, and increasingly that distinction is what corporate buyers and reporting frameworks scrutinise.

Tariffs, term and the risks worth pricing in

Sleeved PPAs in the UK typically run 10–15 years — shorter than the 15-to-25-year on-site norm, because the generating asset is financed independently of your contract and the supplier prefers a tenor it can hedge. Year-one tariffs sit in the 11–20 p/kWh band before the supplier's sleeving fee, usually with an RPI- or CPI-linked escalator so the rate tracks inflation over the term. Against grid import of roughly 21–25 p/kWh for most commercial off-takers, that is still a material saving — just a smaller one than the cheapest on-site or behind-the-meter routes deliver.

Three risks deserve explicit attention before you sign:

• Supplier credit and balancing risk — the sleeve depends on the licensed supplier staying solvent and managing its book; a supplier failure mid-term forces you to re-paper the arrangement.
• Generator-failure cascade — if the solar farm under-performs or goes offline, your sleeved volume falls and your top-up from the market rises, exposing you to wholesale prices.
• Imbalance charges — in non-firm structures, forecast deviations are passed through and can erode the headline saving in a volatile year.

None of these is a reason to avoid sleeving; they are reasons to read the contract as a risk-allocation document rather than a price list. The single most valuable thing an independent adviser does on an off-site PPA is map which party carries each of these risks and what that does to your true delivered cost.

The downsides of a sleeved PPA

The main downside of any PPA is lost flexibility: a commitment of a decade or more to one counterparty, a price you cannot walk away from if the market falls, and no ownership of the asset. A sleeved deal also puts a supplier in the middle. Seven trade-offs are worth pricing before you sign:

• You own nothing, so the tax reliefs are not yours — capital allowances follow whoever incurred the capital expenditure, which is the funder of the farm. Under any PPA you are buying electricity, not plant; see how PPA payments are treated for tax, and take advice on your own position.
• The saving is narrower than an on-site deal — sleeved units cross the public network, so they keep network charges, policy costs and the Climate Change Levy. Power generated behind your own meter avoids the network charges, which is why on-site tariffs sit below sleeved ones.
• Long lock-in against a market nobody can forecast — if wholesale prices fall for a sustained period you keep paying the contracted tariff. That is the price of certainty, and a real cost in the years it goes against you.
• A term mismatch to manage — the generator tariff runs for a decade or more, while UK business supply contracts are commonly fixed for one to three years and sometimes up to five. The sleeve has to survive successive renewals, and the residual volume and sleeving fee can re-price at each one.
• No direct contract with the farm — remedies for underperformance normally run against the supplier rather than the asset owner, adding a link to the chain when something goes wrong.
• Nothing improves at your building — a sleeve installs no equipment on site, so it does nothing for resilience in an outage, nothing for the building's energy performance and nothing for your load profile.
• Below a certain scale the overhead swamps the prize — supplier negotiation, balancing, REGO accounting and legal review carry fixed costs whatever the volume. This site's rule of thumb is that a sleeve is hard to justify below roughly £100k of annual electricity spend.

None of this argues against sleeving. It argues for reading a sleeved PPA as a risk-allocation document rather than a price list, and for pricing the bad years before you sign up for the good ones. The counterparty and imbalance risks that sit alongside these structural trade-offs are covered in the tariffs and term section above.

The £100k annual-spend threshold is this site's own advisory rule of thumb, based on the fixed administrative cost of running a sleeve — not published market data.

Sources for the figures on this page

Where a figure is this site's own band or rule of thumb it is labelled as such; everything else links to the body that publishes it.

Who sleeves power, and how to go to market

The suppliers that run sleeving desks are largely the utility and energy-supplier corporate-PPA teams — the licensed players with the trading books and balancing capability to shape generation across a portfolio of meters. They sit alongside the specialist rooftop funds that dominate on-site PPAs and the utility-scale developers behind headline corporate deals; each occupies a different part of the market. Choosing the right counterparty for an off-site structure is a different exercise from choosing a rooftop funder, because you are buying a balancing service as much as a power price.

Because the sleeved market is supplier-led and the imbalance and REGO terms vary widely between desks, going to market without a clear specification is how off-takers end up comparing tariffs that are not really comparable. The cleaner approach is to define your load profile, your tenure and your claim requirements first, then run a structured request to a shortlist of suitable desks. Our PPA providers guide sets out the typology of who does what — rooftop funds, supplier sleeving desks, utility-scale developers and infrastructure-fund SPVs — so you approach the right kind of counterparty for a sleeved deal rather than the wrong one.

If you are weighing an off-site sleeve against putting generation on your own roof, the trade-off is set out in full on the on-site PPA page and across the wider PPA structures explainer. As an independent advisory and matching service we do not sell power or sleeve it ourselves — we explain the mechanics, set realistic tariff expectations and introduce you to vetted suppliers for a disclosed referral fee. To get a sleeved or off-site PPA scoped against your actual meters, request an indicative comparison or contact the team.

Frequently asked questions

Related on this site

• On-site PPA explained — The roof-mounted alternative — cheaper per kWh, single-site only
• All PPA structures compared — On-site, sleeved, virtual, corporate and metered variants
• PPA rates & tariffs 2026 — How sleeved p/kWh bands and sleeving fees are built
• PPA providers & supplier desks — Who sleeves power and how to approach the right desk
• On-site vs sleeved PPA — Side-by-side trade-offs for choosing a structure
• Get a sleeved PPA comparison — Scope an off-site PPA against your actual meters
• Off-site PPA explained — The umbrella: sleeved, virtual and private-wire routes compared

The contracts that make up a sleeved PPA

People talk about "a sleeved PPA" as though it were one contract. In practice it is a stack of two or three linked agreements, and knowing which one you are actually signing changes where your remedies sit when something goes wrong.

The first agreement sits between the generator and the licensed supplier: the supplier takes the farm's half-hourly output, normally for the full term. The second is your own supply contract with that same supplier, amended by a sleeving schedule setting out which MPANs receive the sleeved volume, at what tariff, and how the residual grid units are priced. A third, tripartite direct agreement is sometimes added so all three parties are visible to each other.

The consequence is easy to miss: you usually have no direct contract with the solar farm at all. If the asset underperforms, your claim runs against the supplier, whose own recourse runs against the generator. Ask early whether you can see the generator-side terms and how underperformance is passed down to you.

The second structural quirk is the term mismatch. The generator tariff, the 11–20 p/kWh figure you were quoted, is fixed for a decade or more, while UK supply contracts are typically written for one to three years. The sleeve therefore has to be carried across successive supply renewals, and it is the residual non-sleeved volume, plus the sleeving fee itself, that re-prices each time.

• Can the sleeve be novated to a replacement supplier if you switch, or if the incumbent fails?
• Is the sleeving fee fixed for the PPA term, or reset at each supply renewal?
• How is the residual volume priced at renewal — against a market reference, or at the supplier's discretion?
• Do the farm's lenders hold step-in rights that could change your counterparty mid-term?

The wider map of who signs what across each route is set out in our guide to PPA contract structures.

What documents make up a sleeved PPA?

Usually two or three linked agreements: a PPA between the generator and the licensed supplier, your own supply contract with that supplier amended by a sleeving schedule, and sometimes a tripartite direct agreement. You normally hold no contract with the solar farm itself, so remedies for underperformance run through the supplier rather than the asset owner.

How a sleeved PPA runs inside UK settlement

Sleeving in the UK runs on a specific piece of national plumbing, and the detail matters when you are comparing offers. Every unit settles half-hourly against your MPAN under the Balancing and Settlement Code, with the licensed supplier as the registered party. The sleeve is an accounting operation inside that framework: the supplier takes title to the farm's metered output, matches it against your half-hourly demand and reports the net position. The move to market-wide half-hourly settlement is steadily improving that evidence, so you should expect to be shown, period by period, how much of your load the farm actually covered.

The certificates are UK-specific too. REGOs are issued by Ofgem, one per megawatt-hour generated, and they need to be transferred to you and retired against your consumption before a market-based Scope 2 claim will stand up. A supplier offering unspecified certificates from an unnamed source is not offering the same thing as the REGOs from the farm you contracted.

One recurring confusion is worth clearing up. A sleeved PPA is not an export product. The Smart Export Guarantee pays you for surplus exported from your own installation — Octopus's business export product, Panel Power, pays 12 p/kWh and is capped at systems under 150 kWp, so most PPA-scale roofs cannot buy it. Export rates are set by each supplier and move, so treat any figure in an older comparison as needing re-checking against the supplier’s current published rate. A sleeved PPA works on the other side of the meter: you are buying imported units at roughly 11–20 p/kWh against commercial grid import of 21–25 p/kWh. If you own the panels you are in export territory; if you are procuring power for meters you do not generate behind, you are in PPA territory. The two are set side by side in our SEG versus PPA comparison.

Finally, remember that sleeved units travel over the public network. They still carry network use-of-system charges, policy levies and the Climate Change Levy, and that — far more than supplier margin — is what separates sleeved pricing from on-site pricing.

Does a sleeved PPA mean changing electricity supplier?

It means contracting with a supplier that offers sleeving, which may or may not be your current one. In the UK the supplier stays central: it holds the licence, is the registered party at your MPAN and settles every half hour. The sleeve changes how your units are priced and certificated, not who supplies you.

Sleeving agreements differ on whether the supplier or the off-taker ends up holding the certificates, and REGO ownership under a PPA explains the transfer, retirement and double-counting checks to write into the contract.

Retiring the farm's certificates against your consumption only changes your reported figure under one of the two ways to count Scope 2, so check which method your framework requires.

Estates without a single large roof usually reach scale by combining buildings instead, and 2 MWp aggregated across several sites shows how that capacity is wrapped into one agreement.

Keeping a licensed supplier in the middle buys you balancing and credit support but costs you margin — supplier route versus a bilateral deal puts the two options side by side.

Sleeving is one of three routes an off-site deal can take, and corporate PPA structures compared places it against the physical and virtual alternatives.

Elsewhere in this guide

• Solar PPA Structures Explained
• How Solar Power Purchase Agreements Work
• End-of-Contract Options on a Solar PPA
• How a Solar Power Purchase Agreement Works
• Off-taker Covenant: How Your Credit Affects Your PPA
• Solar PPA Pricing: 2026 Benchmark Tariffs