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Commercial Solar Finance UK · Independent
Sector finance angle

Property Portfolios

Multi-let commercial property owners face the landlord-tenant split — strategic financing structures unlock value where direct capital cannot.

Typical size

Variable — portfolio totals from 1MWp to 50MWp+

Typical capex

£800k – £40m+

Self-consumption

From the landlord's perspective, often o

Payback

Highly structure-dependent

Why this sector

Commercial property portfolios face the most complex financing landscape in the commercial solar market. The fundamental challenge is the landlord-tenant split: in most multi-let commercial property, the landlord owns the roof and could install solar, but the electricity demand is on tenant supply contracts. The landlord either captures only the modest common-area demand (uneconomic) or must structure a way to sell solar electricity to tenants — which requires energy supply licensing or a class exemption under the Electricity Act. The most common solution is a 'private wire' or 'sleeved' PPA structure: the landlord (or a special-purpose vehicle) installs solar, sells generated electricity to tenants at a discount to grid prices, and retains the margin between PPA tariff and the cost of generation. This structure works but requires careful contractual drafting, energy supply class exemption registration, metering infrastructure, and tenant engagement. EPC implications matter for portfolio strategy: from April 2023, commercial property below EPC E rating cannot legally be let on new tenancies; from 2027, the threshold rises to C; and from 2030, to B. Solar PV is one of the most cost-effective ways to lift EPC ratings on lettable commercial property. Portfolio owners increasingly view solar investment not just on energy economics but on capital value protection — a building stranded by EPC regulations loses lettability and rental value. The strongest portfolio cases combine PPA tenant engagement with direct landlord investment to capture both the operational margin and the EPC asset value uplift.

Electricity profile

Highly variable across multi-let portfolios. Single-let assets straightforward; multi-let estates have complex profiles. Generally landlord-controlled common areas and HVAC have modest demand; the bulk of building electricity is on tenant supply contracts.

Tax position

Property investment companies, REITs, and property partnerships have varied tax positions. REITs operate under specific REIT tax regimes. Property investment income vs trading income classification affects capital allowance treatment. Tax structuring is often the dominant factor in choosing finance route.

Sector-specific funding

EPC-driven funding (some lenders offering preferential rates for portfolio EPC improvements). UK Infrastructure Bank for very large portfolio decarbonisation. Local authority commercial decarbonisation grants in specific zones.

Worked example

Industrial estate REIT. 28-unit estate near Manchester. 1.4MWp portfolio PV with landlord PPA structure selling to tenants at fixed discount to grid.

Capex

£1.05m (developer-funded under PPA)

Year-one saving

Tenant-side: £215k aggregate annual saving; landlord-side: £62k annual margin on PPA structure

Payback

Capital is developer's, not landlord's. Landlord earns operational margin from year one.

Finance structure

PPA structure with energy supply class exemption. Developer covers capex, sells to tenants, splits margin with landlord.

Pitfalls to watch

  • Energy supply licensing or class exemption required to sell electricity to tenants
  • Lease structures (full repairing and insuring, internal repairing) determine whether landlord or tenant captures benefit
  • Tenant churn risk on long-term PPA structures
  • EPC implications — solar contributes to improved EPC ratings, with consequences for MEES compliance and capital values
  • Structuring complexity adds 6–12 months to typical programme
  • REIT income classification can be affected by certain solar revenue structures

Recommended finance structures

Power Purchase Agreement (PPA)

15–25 years; commonly 20 years

Operating Lease

5–10 years; commonly 7 years

Capital Purchase

Indefinite — system life of 25–30 years

Other sectors

Manufacturing

Daytime-heavy electricity profiles, large industrial roofs, and strong demand for capital …

Warehousing

Vast roof areas and flat 24/7 demand profiles with strong cold-storage and EV-charging int…

Agriculture

Farm building rooftops, ground-mount potential, and high agricultural electricity demand f…

Schools

PSDS funding routinely covers 75–100% of capital cost, making solar a near-zero-investment…

Frequently asked questions

How does the landlord-tenant split affect commercial property solar?
Three workable structures: (1) tenant-funded with rent abatement at break — works on long-tenure single-tenant let; (2) landlord-funded with green-rent uplift — works where landlord has cheaper cost of capital; (3) third-party PPA — works for multi-let or short-tenancy buildings where neither party wants to deal with project. Lease drafting often matters more than technology selection.
Do property REITs face FYA constraints on solar?
Property REITs have specific qualifying-income requirements that affect solar capex structuring. REITs holding solar directly may face qualifying-income complications; structuring through PPA arrangements typically resolves the issue (REIT becomes ground-rent recipient rather than electricity-revenue recipient). Worth specialist tax advice for REIT-owned property solar projects.
Can MEES compliance support solar deployment?
Yes — increasingly the practical driver of commercial property solar. The Minimum Energy Efficiency Standards regime requires E or above to let; C is the post-2030 target for some property types. Solar PV typically delivers 5-15 EPC point uplift on commercial buildings, supporting MEES compliance and sometimes EPC band uplift. Buildings approaching MEES thresholds often deploy solar as part of broader EPC improvement programmes.
How do tenant changes mid-PPA work?
Standard PPA structures include assignment provisions for tenant changes — the new tenant typically takes over the offtake obligation. Landlord remains the constant party in the structure. New tenant's covenant must be acceptable to PPA developer; minor pricing adjustments may apply. Worth negotiating change-of-control clauses carefully at PPA signing to handle reasonable tenant turnover scenarios.
Does the asset management fee structure affect solar economics?
For property funds with net asset value-based fees, solar deployment increases NAV without proportionally increasing assets-under-management complexity, supporting fund manager returns. For income-based fee structures, solar income increases fee base directly. Either way, solar deployment is typically NAV-and-fee accretive for property fund managers if structured correctly. Specialist property structuring matters here.

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