How the structures look in the wild.
Thirteen projects across manufacturing, schools, NHS, hospitality, agriculture, higher education, retail, property, offices, churches, sports, data centres, and food production. Different sectors, different finance structures, same principle: model the alternatives, recommend the one that wins on the client's actual numbers.
Food Production
East Anglia frozen food producer
1MWp solar driven by major retailer supplier-decarbonisation scoring. £500k cash + £300k retailer-affiliated lender. Year-1 saving £245k + supplier-scoring uplift worth £350k+ over contract.
System
1MWp
Payback
3.3 yrs simple
Data Centres
London data centre
580kWp solar with customer ESG procurement uplift. Direct electricity saving £138k year-1 + customer-renewal value £400k+. Project IRR including renewal value: above 80%.
System
580kWp
Payback
3.4 yrs simple
Sports & Leisure
Surrey golf club
120kWp 25-year PPA with zero member-fund draw. Resolved member-funding constraint that had blocked previous capital-purchase attempts. Year-1 cash benefit £18k.
System
120kWp PPA
Payback
Day-1 positive
Churches & Charities
Cotswolds Anglican diocese
8-parish portfolio funded by Big Lottery + Patagonia grants + diocesan loan + parish reserves. Listed-building consent secured on 6 of 8 churches. Year-1 saving £42k.
System
£280k portfolio
Payback
Effectively grant-funded
Offices
London multi-let office
240kWp landlord-funded with green-rent uplift on 3 tenants + direct-offtake + £35k tenant fit-out contribution. Resolved 3-year-old multi-let landlord-tenant split.
System
240kWp
Payback
4.0 yrs landlord
Retail
South West retail chain
720kWp across 9 stores under single 8-year operating lease. Off-balance-sheet treatment preserved gearing capacity for acquisition financing.
System
720kWp / 9 stores
Payback
£128k yr-1 net cash
Higher Education
Midlands university campus
1.6MWp across 4 buildings. Blended £600k cash + £700k green loan, structured through trading subsidiary to capture FYA despite charitable status.
System
1.6MWp portfolio
Payback
4.0 yrs simple, 3.1 yrs post-FYA
Agriculture
Norfolk agriculture cooperative
1.1MWp ground-mount on under-utilised land. 7-year hire purchase asset finance smoothed seasonal cash flow versus lumpy capex.
System
1.1MWp ground-mount
Payback
4.1 yrs simple, 3.2 yrs post-FYA
Hospitality
Cotswolds boutique hotel group
480kWp across 4 properties under 20-year PPA. Zero capex, £82k year-one cash benefit, structure that worked around debt covenant constraint.
System
480kWp portfolio
Payback
Day-one cash positive
NHS Trust
East Midlands NHS Trust
2.4MWp across 8 estate sites, PSDS Phase 3 grant covered 75% (£1.44m) plus zero-interest Salix loan over 10 years for the residual.
System
2.4MWp portfolio
Payback
Effectively grant-funded
Property / Multi-let
Industrial estate REIT
Developer-funded tenant-PPA delivered £215k aggregate tenant savings, £62k landlord margin, EPC uplift D→B.
System
1.4MWp PPA
Payback
£0 landlord capex
Education / Public
West Yorkshire multi-academy trust
PSDS Phase 3 grant covered 78% of £2.35m bundled solar + heat pump portfolio across 8 schools.
System
1.2MWp + heat pumps
Payback
2.4 yrs net of grant
Manufacturing
Black Country precision engineer
70% green loan / 30% capital blend captured full FYA + AIA, year-one positive cash, £172k year-one electricity saving.
System
850kWp
Payback
3.9 yrs
Frequently asked questions
What finance structures are most commonly used in commercial solar case studies?
What system sizes feature in commercial solar case studies?
How long do commercial solar PPA contracts typically run?
Can I see a case study that matches my business type or sector?
Commercial solar finance case studies: real-world project economics
Our case study library documents real commercial solar projects across sectors, system sizes, and finance structures. Each case study includes the full financial model — system cost, finance terms, energy savings, AIA benefit, SEG income, and net payback — so you can benchmark your own project against comparable installations.
The projects documented span 25kWp GP surgeries to 1MWp data centres, and finance structures from PSDS grants for NHS Trusts to 25-year PPAs for golf club car parks. The diversity of outcomes reflects the adaptability of commercial solar finance to almost any business situation.
Case study highlights by sector
Manufacturing: Black Country manufacturer
350kWp on steel portal frame factory. Asset finance HP at 5.5% APR. AIA saving £87,500 in year 1. Annual energy saving £78,000. Net payback 4.8 years. Detailed breakdown of HP structure and tax treatment.
Education: West Yorkshire MAT PSDS
12 schools, 1.2MWp total. PSDS grant covering 72% of £1.1m project cost. SALIX 0% loan for remainder. Annual saving £282,000 across estate. Zero net cost to MAT capital budget.
Logistics: Industrial estate REIT PPA
1.8MWp on 8 logistics units. Developer PPA at £0.075/kWh. Off-balance-sheet for REIT; each tenant pays reduced electricity. Annual saving £340,000 across estate. EPC improvement from D to B.
Agriculture: Norfolk cooperative
480kWp across 6 farm buildings. Asset finance HP at 6% APR with seasonal payment profile. AIA saving £120,000 year 1. Annual saving £92,000. Includes ground-mount array on low-productivity field.
Healthcare: East Midlands NHS Trust PSDS
750kWp across 3 hospital sites. PSDS Phase 3 grant (65%). SALIX loan (35%). Combined solar + ASHP project. Annual saving £176,000. Carbon reduction 285 tonnes CO2e per year.
Retail: South West retail chain operating lease
23 stores, 1.4MWp total. Portfolio operating lease at £1.1m/year. Annual electricity saving £2.4m across estate. Net saving £1.3m/year. Fixed costs enabling accurate budget forecasting.
What the case studies tell us about commercial solar economics
| Finance structure | Typical payback range | 20yr IRR range | Best for |
|---|---|---|---|
| Cash purchase | 4–8 years | 20–35% | Owner-occupiers with available capital |
| Green loan (7yr) | 2–4 years (cash flow positive from yr1) | 15–22% | Cash preservation; profitable SMEs |
| Asset finance HP | 3–6 years | 15–20% | Manufacturing; agriculture; secured rate |
| PSDS grant + SALIX | 0–3 years (partial/zero capital) | N/A (funded project) | Public sector; schools; NHS; councils |
| PPA (20yr contract) | N/A (no investment) | N/A | Leasehold; loss-making; zero capital available |
| Operating lease | Immediate positive cash flow | N/A | Multi-site retail; predictable costs |
The consistent finding across our case studies is that ownership structures (cash, green loan, HP) deliver superior long-term economics in every sector where ownership is possible. The average 20-year net benefit from ownership is 45–60% higher than equivalent PPA structures — primarily driven by AIA tax relief and full retention of SEG export income.
Project profile that looks similar to one of these?
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