Commercial Solar PV for UK Businesses

Commercial solar panels built around your business, not a catalogue

UK businesses now pay 25p to 45p per kWh on commercial electricity contracts, roughly double the rate of three years ago. For a building that runs through the working day, on-site solar is the most reliable way to take a permanent slice out of that bill. A well designed commercial solar PV system generates power exactly when a commercial building uses it most, so 55 to 85 percent of what it produces is consumed on site and never bought from the grid. That self-consumption, not the raw size of the array, is what decides your return.

Sized from your meter data, not a rule of thumb

A good installer starts every design from your half-hourly meter data and roof drawings, then models the system in PVSyst and shares the file. The aim is annual generation equal to 60 to 85 percent of your consumption, enough to make a real dent in the bill without exporting large volumes of low-value power. As a guide, one kWp of panels needs about five to six square metres of unshaded roof and generates 900 to 1,000 kWh a year in the UK, so a 1,000 square metre warehouse roof typically supports 150 to 180 kWp. Our savings calculator gives you an indicative figure in seconds, and the cost guide sets out real prices by system size.

Funded the way that suits your balance sheet

Most commercial installs do not need capital up front. Asset finance spreads the cost over five to seven years and is usually cash-flow positive from month one, because the finance payment is smaller than the bill it replaces. A Power Purchase Agreement needs no capex at all: a funder owns the system and you buy the power at a fixed rate below grid. If you buy outright, 100 percent Annual Investment Allowance lets a profitable company deduct the full cost from taxable profit in year one, and VAT is reclaimable for VAT-registered businesses. A good installer models cash, finance and PPA side by side, with the return on each; see the grants and funding page.

Every commercial building is different

An office with weekday occupancy, a warehouse with forklift charging and refrigeration, and a factory on a 24-hour process line all size and pay back differently. That is why the design should be built around the sector rather than swapping a noun on a template. Explore the profile for offices, warehouses and industrial units, manufacturing, retail, agricultural buildings, hospitality and the public sector, each with its own typical sizing, payback and compliance notes.

Commercial solar power across the UK

Commercial solar power is relevant to businesses across England, Wales and Scotland, from single sites to multi-site estate rollouts. Local grid capacity, Distribution Network Operator timescales and council net-zero targets all shape a project, so each of our area guides covers the local picture, from industrial estates and typical commercial energy spend to G99 connection lead times.

An honest specialist, not a clipboard sales call

The right installer should be MCS certified and NICEIC, RECC or TrustMark registered, and OZEV approved for any EV charging work. If your roof, load profile or tenure do not suit solar, a reputable installer will say so. When you are ready, request a quote or read the answers to common questions on our FAQs page.