PPA Mechanics · Rates & tariffs

Solar PPA Pricing: 2026 Benchmark Tariffs

PPA tariffs are quoted in pence per kilowatt-hour. In 2026 the indicative range across the UK market is 9–22 p/kWh year-1 — well below the 28–32 p/kWh that most commercial off-takers pay for grid import.

Current UK solar PPA rates 2026 — by system size

System size	Year-1 PPA tariff	Indicative system value	Generation
50kWp	16–20 p/kWh	£42,000–£55,000	47,500 kWh/yr
100kWp	14–18 p/kWh	£82,000–£105,000	95,000 kWh/yr
250kWp	12–16 p/kWh	£200,000–£260,000	237,500 kWh/yr
500kWp	11–14 p/kWh	£395,000–£500,000	475,000 kWh/yr
1MWp	10–13 p/kWh	£750,000–£950,000	950,000 kWh/yr
2MWp	9–12 p/kWh	£1.45m–£1.85m	1,900,000 kWh/yr
5MWp (ground-mount or large rooftop)	8–11 p/kWh	£3.5m–£4.5m	4,750,000 kWh/yr
10MWp+ (utility-scale)	£42–£55/MWh fixed (4.2–5.5 p/kWh)	£6.5m+	9,500,000 kWh/yr

Year-1 indicative, on-site PPA, investment-grade off-taker, 20-year term. Last reviewed 10 July 2026.

2026 indicative tariff bands by PPA structure

PPA structure	Year 1 tariff	Vs grid import	Typical term
Behind-the-meter on-site	8–14 p/kWh	−55% to −70%	15–25 years
On-site (in-front-of-meter)	13–18 p/kWh	−40% to −50%	15–25 years
Sleeved PPA	11–20 p/kWh	−30% to −60%	10–15 years
Corporate PPA (utility-scale)	£42–£60/MWh (4.2–6 p/kWh)	−75% to −85%	10–20 years
Virtual/synthetic PPA	£45–£55/MWh strike	Financial hedge — no physical delivery	10–15 years

PPA tariff vs grid import vs owning the system

Where a PPA rate sits relative to grid import and to owned-solar LCOE is the whole point — here is a 500 kWp site on a 12 p/kWh on-site PPA:

PPA rate vs CapEx vs lease — lifetime cost

Route	Upfront	Unit cost	Performance risk	Own the asset?
Solar PPA	£0	9–18 p/kWh	Provider	No (buy-out option)
Cash / CapEx	£40k–£400k+	~4–6 p/kWh (LCOE)	You	Yes
Operating lease	£0 (fixed monthly)	Fixed regardless of output	You	No
Asset finance	£0 down	Loan + ~4–6 p/kWh after	You	Yes (after term)

Buying outright wins on lifetime cost if you have the capital and a 20-year horizon; a PPA wins on cashflow and shifts performance risk to the provider. Full breakdowns on compare PPA UK.

End-of-contract buy-out values

When	Indicative buy-out (% of original capex)	Why
Year 7	~40–60%	Asset still has 23+ years of generation left
Year 15	~10–25%	Most of the investor's return is banked
End of term (15–25 yr)	Fair market value, often nominal	Extend, buy at FMV, or free removal

PPA rates by sector

Sector	Typical PPA rate	Typical size
Factories	10–14 p/kWh	250kWp–2MWp
Warehouses	9–13 p/kWh	500kWp–5MWp
Hotels	12–16 p/kWh	100–500kWp
Schools	13–17 p/kWh	50–250kWp
Hospitals	11–15 p/kWh	250kWp–2MWp
Farms	10–14 p/kWh	100kWp–5MWp
Offices	13–18 p/kWh	50–500kWp
Retail	12–16 p/kWh	100kWp–2MWp
Care Homes	14–18 p/kWh	30–150kWp
Churches	15–19 p/kWh	20–100kWp

Eight drivers of your PPA rate

How UK PPA rates vary by region

Two identical rooftops can be offered very different PPA tariffs purely because of where they sit. A PPA rate is set so the funder recovers its capital and target return from the kWh the array actually generates — so the lower the annual yield, the more each unit has to earn, and the higher the p/kWh the funder needs. Geography drives yield more than any other fixed factor on your site.

As a rule of thumb, a well-oriented commercial array in southern England produces roughly 1,000–1,080 kWh per kWp per year, the Midlands and Wales around 900–1,000, and much of northern England, Scotland and Northern Ireland closer to 800–900 — a spread of about 20–25% top to bottom. Because the funder's fixed costs are spread over fewer units in the north, the same deal structure can price 1–2 p/kWh higher there than on an equivalent southern roof. That is a genuine physical effect, not a negotiating position — but it is exactly why a benchmark rate quoted for "the UK" tells you little until it is localised to your postcode and roof.

Region	Indicative yield (kWh/kWp/yr)	Relative effect on p/kWh
South-West & South-East England	~1,000–1,080	Lowest (baseline)
East of England & London	~980–1,050	Broadly baseline
Midlands & Wales	~900–1,000	Slightly higher
Northern England	~850–920	Higher
Scotland & Northern Ireland	~800–880	Highest

Figures are illustrative planning ranges for typical unshaded commercial arrays; your own yield depends on pitch, orientation, shading and inverter design. Model your site precisely with our PPA savings calculator.

Yield is only half the regional story. The other half is the grid. In parts of the country the local Distribution Network Operator (DNO) has little spare capacity, so an export or grid connection can be capped, delayed, or require a paid reinforcement — and a constrained connection changes the economics of a funded deal. Where export is limited, funders lean more heavily on your on-site consumption to make the numbers work, which favours sites that use most of what they generate during daylight. If your connection is constrained, a well-sized battery or a self-consumption-led design can matter more to your tariff than the region itself. We cover how connection capacity feeds through to the headline number in our solar PPA cost guide.

How to benchmark a 2026 PPA quote

A tariff is only as good as the terms wrapped around it. A low year-1 rate paired with an aggressive escalator, a punitive buy-out or a weak performance guarantee can cost far more over 15–25 years than a slightly higher opening rate on clean terms. Run every offer through the same checklist before you compare the headline p/kWh — and compare like-for-like on structure, since an on-site rate and a sleeved rate are not directly comparable.

• Year-1 rate and structure — confirm the opening p/kWh and whether it is an on-site (behind-the-meter) or sleeved/off-site deal, so you are comparing the same product.
• Escalator basis and cap — is the annual uplift a fixed percentage, CPI/RPI-linked, or hybrid, and is there a stated ceiling? An uncapped index-linked escalator is an open-ended liability.
• Contract term — the length (typically 15–25 years) and whether there are break points. A longer term usually buys a lower rate but locks you in for longer.
• Buy-out / early-termination formula — how the price to purchase the array (or exit early) is calculated at set points, and whether that formula is transparent and fixed in the contract rather than "fair market value TBC".
• Performance-ratio guarantee — does the provider guarantee a minimum generation or performance ratio, and what is the remedy (rebate or make-good) if the system underperforms? This is what protects you from paying for kWh that never arrive.
• Assignment on sale of the property — can the PPA transfer cleanly to a new owner or tenant if you sell or vacate, and on what terms? An unassignable PPA can complicate a future property transaction.
• End-of-term options — what happens at expiry: free transfer of the asset, a nominal buy-out, removal, or an extension — and who bears any decommissioning cost.
• Maintenance, insurance and metering responsibilities — confirm in writing that O&M, insurance and metering sit with the funder (as the tariff build-up assumes) and are not quietly passed back to you.

Score each competing offer against all eight points, not just the opening rate, and you will usually find the genuinely cheapest deal over the life of the contract is not the one with the lowest year-1 number. If you would like an independent, provider-neutral read on how a specific quote stacks up, send us the offer for a benchmarking review — we compare it against current 2026 market terms rather than any single funder's book.

FAQs

PPA rates & pricing FAQs

What is a good solar PPA rate in 2026?

A good 2026 UK commercial solar PPA rate is 9–14 p/kWh for a 250 kWp+ on-site deal with an investment-grade off-taker on a 20–25 year term — versus 28–32 p/kWh for grid import. Behind-the-meter industrial deals can reach 8–11 p/kWh; smaller or sleeved deals run 14–20 p/kWh.

How much is a PPA per kWh in the UK?

UK solar PPA tariffs in 2026 range from about 8 p/kWh (large behind-the-meter) to 22 p/kWh (small in-front-of-meter or sleeved), with most mid-size on-site deals landing 11–15 p/kWh year-1. Utility-scale corporate PPAs are quoted in £/MWh, typically £42–£60/MWh (4.2–6 p/kWh).

Are PPA rates negotiable?

Yes, especially for systems above 250 kWp and investment-grade off-takers. The headline tariff, escalator, term and exit options all sit on the table during heads of terms.

Why is my PPA rate higher than the headline range?

Most commonly: small system size (<100 kWp), short site tenure, sub-investment-grade covenant, lower northern UK yield, or DNO connection issues. The headline ranges assume a clean, mid-size deal.

Should I always pick the lowest PPA rate?

No. A low headline tariff with a 5% escalator costs more over 25 years than a higher tariff with 0%. Always model cumulative cost, not just year-1 p/kWh.

Go deeper on PPA rates

• PPA savings calculator — model your own p/kWh
• Cost by system size — capex + tariff per band
• How escalators change your effective rate — fixed vs RPI vs CPI
• PPA providers & specialists — who offers these rates
• PPA rate vs buying outright — lifetime cost compared
• Get a site-specific tariff — indicative rate in 24 hours