The single most consequential commercial decision in UK hotel solar in 2026 is PPA vs capital purchase. Each route has clear lifetime economic, balance sheet, and operational implications. Get it right and the chosen structure compounds the value of the underlying solar economics; get it wrong and you trap capital, complicate property sale, or miss tax shield value.
The fundamental difference
Capital purchase
Hotel funds the capex upfront. Hotel owns the solar asset. Hotel captures 100% of the operating savings. Hotel claims AIA tax shield (typically 25% effective capex discount). Hotel takes asset depreciation on balance sheet. Hotel responsible for ongoing O&M.
PPA (Power Purchase Agreement)
Third-party PPA provider funds the capex. PPA provider owns the solar asset and claims tax position. Hotel buys generated electricity at fixed PPA tariff (£0.085-£0.105/kWh typical) versus grid retail (£0.27-£0.34). Hotel captures the difference as operating saving. Hotel pays nothing upfront. PPA provider responsible for ongoing O&M for contract term (15-25 years).
Worked example — 220-room chain hotel
| Metric | Capital purchase | PPA |
|---|---|---|
| System size | 320 kW | 320 kW |
| Capex from hotel | £290,000 | £0 |
| AIA tax shield | £72,500 | Not applicable (PPA provider takes tax) |
| Effective net capex | £217,500 | £0 |
| Year-1 gross saving | £71,000 | £71,000 |
| Year-1 PPA tariff cost | £0 | £24,650 |
| Year-1 net to hotel | £71,000 | £46,350 |
| Simple payback | 3.1 years post-AIA | Day-one positive |
| 25-year lifetime saving (3% inflation) | £2,800,000 | £1,650,000 |
| O&M responsibility | Hotel | PPA provider |
| Balance sheet asset | £290k depreciating | None |
When PPA wins
Three categories where PPA is clearly the right answer:
1. Managed-contract chain hotels
Where the freeholder owns the building but the brand operates the hotel (typical Hilton, IHG, Marriott, Accor managed UK estates), capex case is difficult to make — capex sits with freeholder, savings flow to operator. PPA collapses this into a clean three-party structure: freeholder is PPA counterparty, operator is electricity consumer, savings shared via management-fee adjustment. We have closed multiple three-party UK managed-contract PPA structures across all four major international brands.
2. Tight-margin operators (hostels, B&Bs, charity hospitality)
Where capex compete with critical operating cash needs (room refurbishment, F&B reinvestment, restricted-fund obligations for charities), PPA preserves capital for the alternative uses while still capturing meaningful operating margin improvement.
3. Properties with imminent sale or refinancing
Capital purchase creates a £200k+ depreciating balance sheet asset that complicates EBITDA-multiple property valuations. PPA keeps the structure off balance sheet, with novation provisions for property sale.
When capital purchase wins
1. Owner-operator hotels with capital available
Lifetime value capture is materially better under capital purchase. £2.8m vs £1.65m on the chain hotel example above. For tax-paying owner-operators with capital available, the lifetime delta typically justifies tying up the £200-£300k capex.
2. Country house wedding venues
Where wedding-business marketing return adds £100k-£200k year-1 to the underlying energy economics, the combined return on capital purchase typically delivers 2.5-3.5 year payback — comfortably better than any alternative capex allocation.
3. Group operators with substantial AIA + 50% FYA capacity
Multi-property UK chain hotel groups investing £2m+ annually in solar across the portfolio capture combined AIA (first £1m) + 50% FYA (above £1m) tax shield delivering 17-25% effective capex discount on group programmes.
PPA vs capex FAQs
PPA or capital purchase — which delivers better lifetime value?
Capital purchase typically wins on 25-year lifetime saving (hotel captures 100% of the saving). PPA wins on day-one cashflow (zero capex, immediate positive contribution). Decision depends on capital availability, tax position, brand and franchise commercial structure, and operator capital allocation priorities.
When is PPA the clearly right answer?
Managed-contract hotels (freeholder owns building, brand operates), franchise hotels where franchisee prefers capital preservation, charity hospitality, tight-margin hostels, hotels with planned sale within 7-10 years, hotels prioritising room refurbishment capex over energy capex.
When is capital purchase the clearly right answer?
Tax-paying owner-operator hotels with capital available, hotels in stable long-term ownership horizon, properties where AIA tax shield delivers material benefit, country house and resort hotels with substantial wedding-business marketing return justifying capital.