Green energy finance in Derby: commercial solar funding

Commercial solar finance for businesses across Derby and the wider Derbyshire area, including Belper, Ilkeston, Ashbourne.

Green energy finance in Derby usually means asset finance for a commercial solar array: hire purchase, a finance lease or an equipment loan, repaid over three to seven years. On an illustrative £96,000, 120 kW system at 8.5% APR over seven years the repayment is about £1,505 a month, below the value of the power the array can generate. This site is not a lender and not an installer; it explains how the funding works.

Derby is an advanced-manufacturing city, and that shapes how its businesses pay for solar. A precision-engineering unit on Sinfin Lane, a logistics operator on Raynesway or a manufacturer on the Spondon estate runs an energy-intensive site on a tight capital budget, so the question is rarely whether the panels pay back. It is how to fund the system without tying up the cash the business needs for tooling, stock and headcount. The average commercial energy spend across the city is around £44,000 a year, and for many supply-chain firms it is well above that. For a nearby comparison, see the Nottingham asset finance guide; the installed cost per kWh is worked through in what commercial solar costs per kWh.

Derby facts that change the numbers

• Yield. The European Commission’s PVGIS models about 995 kWh per kWp a year in Derby at the optimal tilt and about 894 at a 10-degree flat-roof tilt (13% system losses, PVGIS-SARAH2), against 1,044 in Cardiff. A 120 kW array therefore generates roughly 119,000 kWh a year at the optimal tilt.
• Grid. Derby is in the East Midlands distribution area of National Grid Electricity Distribution, so a larger array’s G99 connection application goes to them.
• Planning. In England, solar PV on the roof of a non-domestic building is permitted development under Part 14, Class J of the General Permitted Development Order 2015 (SI 2015/596). Class J sets no kW cap, but on a flat roof the array may not stand more than 1 metre above the highest part of the roof or sit within 1 metre of the roof edge, and it is not permitted on a listed building or a scheduled monument. Roof arrays above microgeneration size fall under Class J(c), which needs the planning authority’s prior approval on glare for neighbours.
• Business rates. In England, plant used to generate or store power from photovoltaics or other mainly renewable sources is excepted from rating valuation for any day before 1 April 2035 (SI 2022/405, in force 1 April 2022), so an on-site array should not raise the rateable value of the building.
• Council. Derby City Council is working to net zero by 2035 under its Climate Change Action Plan 2025 to 2027, which it approved in November 2024 (derby.gov.uk).
• Grants and export. On 3 November 2026 there was no national capital grant for commercial rooftop solar and none of the local routes we confirmed open covered businesses in this part of the East Midlands; the grants and funding page lists what was open. The Smart Export Guarantee applies, and it goes to whoever owns the system.
• Allowances. Solar PV is special-rate expenditure: the Annual Investment Allowance covers up to £1 million a year, with a 50% first-year allowance above that. It does not qualify for full expensing. The owner of the system claims them, which is why the funding route matters.

Why Derby businesses finance solar rather than buy outright

A commercial rooftop array on a unit at Pride Park or Sinfin Lane is a five- or six-figure purchase. Paying cash for it removes a chunk of working capital and concentrates that capital in an asset that returns its value slowly, over years of avoided electricity cost. For a manufacturing or distribution business — the dominant profile in Derby — that capital is almost always worth more deployed in the operation.

Asset finance solves the timing problem. Instead of one large payment up front, the cost is spread across the life of the system. Because generation starts cutting your electricity bill from the day of commissioning, a well-structured agreement means the saving and the repayment overlap — a business can be cash-flow positive on the system while still paying for it.

The second reason is certainty. A fixed-rate finance agreement turns an unpredictable, rising electricity bill into a known monthly cost for the term — and for a finance director budgeting years out, swapping a volatile line item for a fixed one is valuable in its own right.

A worked example — hire purchase on Sinfin Lane

Take an engineering firm on the Sinfin Lane industrial estate carrying the city’s average £44,000 annual electricity spend. It installs a 120kW rooftop array at an indicative cost of £96,000, on hire purchase over seven years at an illustrative 8.5% APR.

On indicative terms the repayment lands at roughly £1,505 a month. At about 119,000 kWh a year, and assuming all of it is used on site at 22p to 28p per kWh (an assumption, not a tariff), the array displaces roughly £26,000 to £33,000 of grid electricity a year, or £2,190 to £2,780 a month, plus Smart Export Guarantee income on any surplus. On those assumptions the saving sits above the repayment from the first month, and at the end of the term the business owns the system outright.

This is illustrative, not a quote — the actual figures turn on your roof, your tariff, your usage profile and the rate you qualify for. You can compare your own numbers with the finance calculator and see how installation pricing breaks down on the cost page.

Which finance routes suit local firms

There is no single right structure — the best route depends on whether you want to own the asset, your tax position, and what you want on your balance sheet.

• Hire purchase — the most common choice for owner-managed Derby businesses that want to end up owning the system. You take title from the outset for capital-allowance purposes, pay across the term, and the asset is yours at the end. Best when you have taxable profits to set the allowances against.
• Equipment loan — an unsecured or asset-backed loan to buy the system outright. Like hire purchase, the business owns the array and claims the allowances, but the funding sits separately from the equipment. Useful when you want a clean ownership position from day one.
• Finance lease — the lessor holds title and typically claims the capital allowances, passing the benefit back through lower rentals. This can suit a business that cannot fully use the allowances itself, for example one with limited taxable profit in the relevant year.
• Operating lease — lower rentals, no ownership, and the rentals are deductible as an operating cost. There are no capital allowances for the lessee here, so it suits firms prioritising off-balance-sheet treatment over ownership.
• Capital purchase — paying cash where the working-capital case allows it. The business owns the system and claims the full allowances, so the structure still needs setting up correctly.
• Sale-and-leaseback or refinance — if you have already bought a system outright, you can release the capital back out and lease it back, freeing cash for the operation.

For most Derby supply-chain firms with steady profits, hire purchase or an equipment loan is the natural starting point, because both keep ownership — and therefore the allowances and export income — with the business.

Capital allowances and ownership versus PPA

This is where the structure you choose has real financial consequences, so it is worth being precise.

Solar PV is special-rate expenditure. It qualifies for the Annual Investment Allowance (AIA) at 100% on up to £1m of qualifying spend a year, and for the 50% first-year allowance on expenditure above that threshold. It does not qualify for 100% full expensing — that relief is for main-rate plant only. Both the AIA and the 50% first-year allowance are permanent features of the regime, so the relief is there for whoever owns the asset to claim.

And ownership is the whole point. If you fund the system through hire purchase, an equipment loan or a cash purchase, your business owns it and claims those capital allowances. Under a finance lease the lessor usually claims the allowances and passes the benefit to you through lower rentals. Under an operating lease there are no allowances for you as lessee, though the rentals are deductible.

A Power Purchase Agreement (PPA) sits at the far end of that spectrum. Under a PPA a third-party funder owns the panels on your roof, claims the capital allowances and keeps the Smart Export Guarantee income, while you simply buy the power they generate. You avoid the upfront cost, but you hand away the tax relief and the export revenue and tie yourself into a long electricity-supply contract.

The comparison comes down to this: owning the system through asset finance keeps the allowances and SEG income with your business, where a PPA gives both away to the funder. For a profitable Derby manufacturer, that difference compounds across the life of the system. This is set out in full on the capital allowances page, and the two approaches are weighed side by side at asset finance vs PPA.

Why the council target matters to a Derby supplier

Derby City Council’s 2035 net-zero target (above) is the council’s own, and it applies to the council’s estate and influence rather than to private firms. Where it bites on a manufacturer is in procurement: customers and prime contractors in the Rolls-Royce supply chain can ask suppliers to evidence their carbon position, and on-site generation is one of the clearer ways to do that. The same finance routes apply across the neighbouring towns this guide covers (Belper, Ilkeston, Ashbourne, Burton upon Trent and Long Eaton) and in nearby Nottingham.

Next steps for Derby businesses

If your business runs on a Derby industrial estate and you are weighing up solar, the funding route you choose will shape the return for years. This site is not a lender and not an installer; it explains how asset finance can let a business own a system on terms that fit its cash flow, and how the structure keeps the capital allowances and the export income with the business.

Use the finance calculator to compare cash, hire purchase, a lease and a PPA from your own figures. Send your project details through the quote form; the enquiry goes to SEO Dons Ltd, which operates this site, and is used only to reply to you.