solar panels for commercial property in Derby

Serving Derby and the wider Derbyshire area, including Belper, Ilkeston, Ashbourne.

Derby is a city of around 261,400 people built on advanced manufacturing, and that shapes its commercial property stock more than most. The aerospace, rail and automotive supply chains anchored by Rolls-Royce on Sinfin Lane and Raynesway have filled the city’s industrial estates with large single-let and multi-let sheds — exactly the kind of asset where rooftop solar makes the strongest case for an owner. This page is written for the people who hold those buildings: landlords, investors, asset managers and owner-occupiers deciding whether solar protects value or just adds cost.

Why Derby’s commercial stock has an EPC problem coming

Since 1 April 2023 it has been unlawful to let a commercial property in England and Wales below EPC E — that applies even to sitting tenants, not just new lettings. That is the only binding MEES rule in force today. What sits behind it matters more for asset value: the BPF reported in October 2025 that roughly 83% of commercial buildings across seven major UK cities fall below EPC B, and the government’s interim response of 18 June 2026 proposes EPC B by 2031 for privately-rented non-domestic buildings over 1,000 m², where cost-effective and subject to secondary legislation. That last point catches a lot of Derby industrial space directly — many of the units on Pride Park, Wyvern Way and Spondon comfortably exceed 1,000 m².

The older “EPC C by 2027” and “EPC B by 2030” headlines were scrapped or never became law, so ignore them. The point for a Derby owner is direction of travel: an asset that scrapes EPC E today is exposed to lettability and valuation risk as the bar rises. Solar typically lifts a commercial EPC by one to three bands — never a guaranteed jump, but often the cheapest band-mover per pound on a building with a large roof and a poor fabric score. MEES penalties already bite: up to 10% of rateable value (capped at £50,000) under three months, rising to 20% (capped at £150,000) at three months or more, plus a public breach register. We cover the detail in our MEES and EPC guide for commercial property.

The split incentive — and how owners get past it

The reason most landlords never install solar is the split incentive: the landlord pays for the system, but the tenant — who buys the electricity — gets the savings. On Derby’s predominantly single-let industrial estates this is solvable, because there is usually one occupier with a clear daytime load. Five ownership routes get the right party paying and the right party benefiting:

• Common-parts / landlord supply — the landlord owns the system and supplies shared services or a single occupier directly. Cleanest on multi-let estates with shared infrastructure.
• Landlord-to-tenant PPA — the landlord funds and owns the array and sells the power to the tenant under a power purchase agreement, usually below grid price. The landlord keeps the asset and the income.
• Roof or airspace lease — you “sell the roof”: a third party funds and operates the system, pays you rent for the roof space, and you carry no capital cost. Common where the owner wants the EPC benefit without the capex.
• Green leases — the lease itself allocates who pays, who benefits and who maintains, so solar is written into the letting rather than bolted on.
• Owner-occupier — if you both own and occupy (common among Derby’s manufacturing SMEs), you take 100% of the economics with no split to engineer.

Which route fits depends on your tenancy structure, lease length and FRI terms. Under most FRI leases the occupier is the rates payer and the electricity buyer, which is precisely why the supply arrangement has to be designed deliberately rather than assumed. Our guide to the split incentive walks through each, and our multi-let commercial buildings page and industrial and logistics property page cover the asset types most common across Derby’s estates.

Self-consumption is the single biggest driver of return, and it is where Derby’s tenant mix helps. A building running plant or refrigeration through the day will self-consume 50–70% of generation from solar alone, and 60–80% with a battery added — far better economics than an office that empties at night. Spare generation exported to the grid earns a supplier-set Smart Export Guarantee rate of roughly 12–16p per kWh, a useful top-up but never the headline. The asset case is built on displacing grid electricity at the meter, not on export.

Local cost, payback and the grid gate

Commercial solar in Derby runs at roughly £700–£1,100 per kWp installed (ex-VAT — commercial installs have been zero-rated for VAT since April 2022), falling as system size grows. A 100 kWp array on a Pride Park warehouse roof typically lands around £82,000–£110,000; a 250 kWp system on a larger Raynesway or Spondon unit, £150,000–£240,000. At a Midlands yield near 950 kWh per kWp per year, and with self-consumed solar displacing grid electricity at roughly 24–28p per kWh, payback usually falls in the 4–8 year range — and at the faster end for high-load manufacturing sites running plant through the day. The Annual Investment Allowance (£1m, permanent) lets a company write off 100% of qualifying solar capex in year one, and rooftop solar plus co-located storage is exempt from business rates in England until 31 March 2035 — together these can shave one to two years off payback.

The real constraint in Derby is rarely the roof or the budget — it is the grid. Any commercial array above roughly 50 kW needs a G99 connection agreement from the DNO, and on parts of the East Midlands network around the heavier-load industrial estates, available capacity is the gating factor on system size and timeline. We always run the DNO question before sizing, because there is no point designing a 300 kWp system the local network will not accept. The planning side is more forgiving: the 1 MW cap on commercial rooftop solar was removed on 21 December 2023, and rooftop installs are permitted development under Class J with a 56-day prior-approval check — not a free pass, but rarely a blocker. Detail on both sits in our planning and grid guide.

What it looks like on a Derby asset — illustrative

Consider a 4,000 m² single-let logistics unit on Wyvern Way, let on an FRI lease to a distribution tenant with average commercial energy spend in the region of £44,000 a year — the local benchmark. A 250 kWp rooftop array might generate around 237,000 kWh annually. With a daytime warehousing operation self-consuming 60–70% of that, the tenant’s grid draw drops materially while the landlord holds an asset that has lifted the building’s EPC and de-risked it against the proposed 2031 standard. Structured as a landlord-to-tenant PPA, the owner funds the system, sells the power below grid price, and books both the income and the value protection — the tenant simply pays less for cleaner electricity. These figures are illustrative; real numbers depend on roof orientation, the DNO connection offer and the lease, which is exactly what we model before anyone commits.

Derby in context

Derby City Council has committed to net zero by 2035 under its Derby Climate Change Strategy, and the city’s advanced-manufacturing base — together with its partial East Midlands Freeport status — keeps decarbonisation high on the agenda for occupiers and their landlords alike. For an owner, the practical question is narrower than the policy debate: does solar protect the lettability and capital value of this specific building, and which ownership structure makes the economics work. That is the question we engineer around. See typical commercial solar costs for current figures, or request a quote with your building’s roof area, postcode and tenancy structure and we will model the routes that fit your asset.