How much do solar panels for logistics cost?

Warehouse solar is priced per kilowatt of installed capacity, and the figure falls as the system gets bigger. For a UK logistics building in 2026, expect roughly £700 to £900 per kW. Large distribution centres and port warehouses buying at scale often land near £600 per kW, and the smallest last-mile depots sit toward the top of the range because the fixed costs of scaffolding, design, and grid connection are spread over fewer panels. In plain numbers, a 500 kW distribution centre array runs about £350,000 to £450,000, a 1 MW big-box system around £700,000 to £900,000, and a last-mile depot of 100 to 400 kW between £90,000 and £340,000.

The thing that makes logistics solar different from most commercial sectors is that roof area is rarely what limits the system. A modern 100,000 to 500,000 square foot shed can physically hold 1 to 5 MW of panels. What actually sets the size is your daytime electricity baseload and the capacity your DNO will let you connect. We always start by pulling your half-hourly meter data, because plenty of warehouses turn out to have a surprisingly low daytime baseload between order peaks, and there is no point installing capacity you cannot use on site. Self-consumed solar is worth far more than exported solar, so we size to your load, not to your roof.

What changes the price

Three things move the number most. First, roof condition. If your roof is profiled steel in good order, panels go straight on. If it is an older asbestos cement roof, which is common on pre-2000 industrial stock, it cannot take rooftop PV and needs replacing first. The good news is that a combined re-roof and solar project often makes the re-roof pay for itself through the energy savings. Second, electrical infrastructure. Many warehouses retain generous supply capacity from their industrial past, which keeps connection costs low, but a constrained site may need switchgear upgrades or a contestable connection. Third, the grid. Systems above 17 kW per phase need a G99 application to the DNO, and large installs over 1 MW sometimes need a bespoke network study and reinforcement works.

The hidden costs worth knowing about

A fair quote should include the items that catch people out. DNO connection fees, the structural survey to confirm the roof can carry the array under BS EN 1991-1-4 wind loading, access equipment, and any sprinkler clearance design to LPC standards. On a logistics building, the sprinkler and insurer requirements are not optional extras, they are part of doing the job properly, and we build insurer pre-design review into every project so there are no surprises before fabrication. Where a re-roof is needed, that is a line item we set out clearly rather than burying it.

How to fund it

There are three routes, and the right one usually depends on whether you own or lease the building. Buying outright, with cash or asset finance, means you own the asset, claim the full capital allowances, and keep every kilowatt-hour of saving. Solar PV qualifies as plant and machinery, so most installs are fully expensed in year one under the 100 percent Annual Investment Allowance up to the £1m threshold, with 50 percent First Year Allowance above. For a limited company that is an effective tax saving worth around a quarter of the capex in the first year. Asset finance spreads the cost over five to ten years and is frequently cash-flow positive from month one for a daytime-occupied warehouse, because the monthly energy saving exceeds the finance payment.

A power purchase agreement, or PPA, is the third route and it suits tenants on shorter leases. A third party owns and operates the system, you pay per kilowatt-hour consumed at a rate below grid retail, and there is no capex and no balance-sheet impact. The lease risk sits with the system owner rather than you. We work with both owner-occupiers and tenants, and where you lease, we provide the green-lease addendum template aligned with the BBP Green Lease Toolkit and engage your landlord directly. Full detail on funding routes and the tax reliefs is on our grants and funding page.

How payback is measured, and against what

You will see several numbers quoted. Simple payback is the capex divided by the annual saving, the figure most people lead with. For UK warehouse solar that is typically five to six years, and faster for cold chain, where 24/7 refrigeration pushes self-consumption above 90 percent and payback often comes inside four to five years. We also model the internal rate of return and net present value over the 25-year asset life, because a five-year payback on an asset that runs for 25 years is a strong long-run return, with IRRs commonly in the mid-teens and higher for cold-chain sites. The benchmark that matters is your grid retail tariff. Every kilowatt-hour you generate and use yourself avoids both the energy cost and the network charges that have risen 40 to 80 percent since 2022, which is why the real-world saving is usually better than the irradiance alone would suggest.

Timeline and cash flow

Most warehouse installs run six to nine months from first conversation to commissioning, and the G99 grid connection is almost always the longest single item, which is why we submit it as soon as the structural survey is back. Crucially, the roof installation happens above your operations. Material handling, picking, and despatch continue normally. The only outage is the final grid synchronisation, four to eight hours, which we schedule for a weekend or planned shutdown. We have delivered installs through peak season with zero operational impact for clients who could not pause.