Solar Panels for Logistics: 2026 Cost & Payback Guide

Solar on a logistics roof is one of the few large, controllable savings left on a distribution P&L, but the headline price tells you almost nothing on its own. What matters is the cost per kilowatt installed, how much of the generation you actually use on site, and the tax treatment. This guide sets out realistic 2026 numbers for UK logistics and distribution sites, and the levers that move payback.

What commercial solar costs per kWp in 2026

For a distribution centre or logistics depot, installed cost typically lands between £600 and £900 per kWp, falling toward the bottom of that range at scale. A large clear-span roof carrying a 1 MW array will usually price near £600 to £700 per kWp; a smaller last-mile depot at 100 to 250 kW sits closer to £850 to £900 because fixed costs (scaffolding, design, grid application) spread over fewer panels. As an indicative guide, that puts a typical distribution-centre project somewhere between £350,000 and £2.4m depending on roof area and system size.

These figures are illustrative and depend on roof type, the fixing system, cable runs and any grid-reinforcement works. A standing-seam or trapezoidal steel roof is cheaper to fix than an older asphalt or asbestos roof that needs remediation first.

Why self-consumption decides your payback

The single biggest driver of payback is not the panel price, it is self-consumption: the share of generation you use on site rather than export. Every kilowatt-hour you consume displaces grid electricity at the full retail price plus network charges, often 25 to 35p. Every kilowatt-hour you export earns only the Smart Export Guarantee rate, frequently around 5p. A logistics site with strong daytime load (materials-handling charging, conveyors, lighting, increasingly chilled zones) self-consumes a high proportion of generation, which is exactly what makes the economics work.

This is why we size from your half-hourly meter data, not your roof area. A roof filled to its edges that exports half its output at 5p pays back far more slowly than a right-sized system matched to genuine daytime demand. As fork-lift and yard fleets electrify, daytime baseload rises, pulling self-consumption and payback in the right direction.

Typical payback and the tax lever

With self-consumption in a healthy range, simple payback for a logistics solar project usually sits near 5 to 5.5 years, after which the electricity is effectively free for the system’s remaining 15-to-20-plus-year life. The biggest financial lever is tax: commercial solar qualifies as plant and machinery, so the Annual Investment Allowance lets most businesses write off the full cost against profit in year one up to the £1m cap, worth up to a quarter of the project value back as tax saved for a limited company, with full expensing or a 50% First Year Allowance available above that.

Our cost guide sets out worked numbers by system size, and the savings calculator gives an instant indicative figure from your electricity spend.

Funding routes that change the maths

Beyond buying outright, two routes are common in logistics. A power purchase agreement (PPA) removes the capex entirely: a third party funds and owns the system and you buy the power at a fixed rate below grid, which suits shorter leases or tight balance sheets. Asset finance spreads the cost while you keep ownership and the capital allowances. If your site sits in a Freeport or Investment Zone, Enhanced Capital Allowances may apply. Leased buildings unlock the work through a green-lease clause that shares the benefit between landlord and tenant. The grants and funding page walks through each route.

What to do next

Get your last 12 months of half-hourly data, confirm your roof type and any DNO capacity already on site, and model the system against genuine daytime load. That gives you a real payback rather than a roof-fill estimate. When you are ready, request a free feasibility and we will return a fixed-price proposal, or read the related distribution-centre and cold-chain pages.