Solar Panels for Warehouse Tenants UK: How to Get Solar Without Owning the Building

The tenant problem — and why it's been solved

The logistics sector has always faced an awkward solar paradox. Warehouse operators are typically large energy consumers — a 150,000 sqft ambient distribution centre can spend £400,000–£600,000 per year on electricity for lighting, conveyors, MHE, EV charger infrastructure and HVAC. The buildings themselves are ideal for solar: wide, flat roofs, minimal shading, modern structural ratings. Yet the majority of occupiers don't own the asset, creating a fundamental disconnect between who benefits from the investment and who can authorise it.

Until recently, the typical response was to approach the landlord and ask them to fund panels and pass the savings back through a reduced rent or service charge — a structure that rarely worked in practice. Institutional landlords (Prologis, SEGRO, Tritax BigBox, LondonMetric) manage hundreds of assets and cannot easily apply bespoke energy arrangements to each tenancy. Smaller private landlords often simply didn't have the capital or appetite.

The structural fix is the Solar Power Purchase Agreement (PPA). Under this model, a specialist solar finance provider installs, owns and maintains the panels. The tenant buys the electricity generated at an agreed rate — typically 18–24p/kWh versus 28–34p/kWh from the grid. The landlord consents to the installation but does not fund it. The solar provider takes the asset risk. The tenant takes the energy savings.

What landlords actually think about warehouse solar

The assumption that landlords will resist solar is increasingly outdated. The 2027 MEES deadline — requiring all let commercial buildings to have an EPC rating of Band C or above to remain legally lettable — has transformed the calculus for property owners. A rooftop solar installation directly contributes to EPC score improvement, and many assets that currently sit at Band D–E will need solar (or other energy efficiency measures) to remain on the market.

Major institutional landlords have gone further. Prologis has committed to installing solar on all viable rooftops across its 100M+ sqft UK portfolio. SEGRO operates an in-house solar programme offering tenants discounted PPA rates from its own installations. Tritax BigBox has incorporated solar into lease agreements as a standard option on new builds. For tenants on estates managed by these REITs, the path to solar is smoother than ever — the landlord may already have a solar provider relationship in place.

Private landlords with smaller portfolios are also increasingly supportive, particularly as solar improves asset values. A warehouse with rooftop solar generating a proven energy saving trades at a premium versus an unimproved equivalent, and landlords who actively improve EPC ratings are building more lettable, future-proof assets.

The situations where landlords resist tend to involve short leases (under 5 years remaining), planning constraints on listed or sensitive buildings, or disputes about who owns the SEG (Smart Export Guarantee) export tariff revenue on excess generation. A well-drafted PPA agreement addresses all three.

How the PPA conversation with your landlord actually works

In practice, the tenant-PPA route follows a consistent process:

1. Tenant commissions a solar assessment — a specialist installer surveys the roof, assesses structural loading, grid connection point and DNO capacity, and produces a generation model. This is free and creates no obligation.
2. Tenant receives indicative PPA terms — the solar provider issues indicative heads of terms covering PPA unit rate, term length (typically 15–25 years), performance guarantees and end-of-term provisions.
3. Tenant approaches landlord — with specific scheme details rather than a vague request. Landlords are far more likely to grant consent when presented with engineering drawings, a planning assessment, confirmed grid connection terms and a named, accredited installer.
4. Landlord licence issued — the landlord grants a licence to install, attach and operate the solar system on the roof. This is a standard legal document that takes 4–8 weeks with solicitors.
5. Installation proceeds — typically 4–10 weeks for a 200–500kW system on an occupied warehouse.
6. Tenant pays reduced electricity rate from day one.

What happens at lease end — the question everyone asks

The most common concern from logistics tenants is: "what happens to the solar when we leave?" This is a legitimate question, and the answer depends on what's in your PPA agreement — which is why getting the heads of terms right matters before signing.

The three standard outcomes at lease end under a PPA are:

The critical risk to avoid is an uncommitted outcome at lease end where the panels remain but the PPA billing rights are unclear. Your solicitor should ensure the PPA agreement has clear assignment and termination provisions before you sign.

The numbers: what a warehouse tenant actually saves

Let's look at a representative example: a 3PL operator in a 120,000 sqft distribution centre in the East Midlands, spending £480,000 per year on electricity at 29p/kWh.

Short leases: what's the minimum term for solar to work?

The standard PPA term is 15–25 years. If you have 5 years remaining on your lease, this creates an obvious mismatch — no solar provider will commit to a 20-year PPA on a building where you're out in 5. However, there are routes forward:

• Lease renewal — if you're planning to renew at the end of the current term, a combined lease extension + PPA negotiation often works well. Landlords may grant a longer lease in exchange for the EPC improvement from solar.
• Shorter PPA terms — some providers offer 10-year PPAs, though at a slightly less favourable unit rate. 10 years is typically the minimum that pencils out for the finance provider.
• Landlord-funded solar — for leases under 10 years, consider approaching the landlord to fund the installation directly and service it through the lease. They get the EPC improvement and SEG revenue; you get the reduced electricity cost through a discounted electricity agreement.

Key questions to ask your solar provider before signing a PPA

Before committing to a PPA agreement, ensure you have clear answers to:

1. What is the indexation mechanism? Does the PPA rate rise with RPI, CPI, a fixed percentage, or electricity market rates?
2. What performance guarantees are in place? What happens if generation falls below projections?
3. Who handles O&M (operations and maintenance)? All inverter, panel and monitoring costs should sit with the provider.
4. What are the assignment provisions? Can the PPA transfer to a new tenant or landlord without your involvement?
5. Is there an exit/buyout option? Can you purchase the system outright at year 5 or 10 if financing conditions improve?
6. Who receives the SEG (Smart Export Guarantee) revenue on excess exported electricity?

FAQ: Solar for warehouse tenants