solar panels for industrial units in London

Serving London and the wider Greater London area, including Croydon, Bromley, Dartford.

Why solar PV makes sense for London industrial units

London holds the densest concentration of industrial and logistics floorspace in the UK, and it also has the highest commercial electricity prices in the country. That combination makes solar PV on an industrial unit roof a stronger proposition here than almost anywhere else. A typical London SME running a single industrial unit spends in the region of £95,000 a year on grid electricity, well above the national average, and last-mile operators serving the capital often run 24-hour shifts that push consumption far higher.

The Greater London Authority has set a 2030 net zero target through the London Environment Strategy, one of the most demanding timelines among UK regions. The London Plan, the city’s statutory spatial framework, expects rooftop solar on all major new commercial development under Policy SI 2, and supports retrofit PV across the existing estate. For owners and tenants of London industrial units, that means planning support is broadly favourable and customer expectations around Scope 2 emissions are already baked into many supply contracts.

London’s industrial roofs are an underused asset. Land here is scarce and expensive, which has historically pushed warehousing into tight multi-storey and multi-let formats, but the flat roofs above those units remain almost entirely empty. Putting that space to work generates electricity exactly where the building consumes it, with no land cost and no grid import charges on the self-consumed portion.

London’s industrial geography, where solar makes the most sense

Park Royal is the largest industrial estate in Europe, spanning roughly 700 hectares across the boundaries of Ealing, Brent, and Hammersmith and Fulham. It hosts well over 1,700 businesses, with food manufacturing, film and TV production support, print, and last-mile logistics making up a large share of tenants. Many Park Royal units are clear-span warehouses with substantial flat roof areas that suit 200 kW to 1 MW arrays, and the estate’s high daytime baseload from chillers, ovens, and production lines means most generated power is consumed on site rather than exported.

Old Kent Road, in Southwark, is one of London’s oldest industrial corridors and is now the subject of a major regeneration plan. Existing waste transfer, builders’ merchant, and light industrial operators here run energy-hungry plant during daytime hours, a near-perfect match for solar generation. The Greenwich Peninsula combines newer commercial sheds with the redevelopment around the O2, and its riverside industrial units carry the kind of large unobstructed roofs that solar designers prize.

Brent Cross, on the boundary of Barnet, mixes retail logistics with the wider Brent Cross Town regeneration, while Stratford in the east hosts a growing cluster of distribution and urban logistics units serving the eastern boroughs and the Olympic legacy area. Across all of these, the binding constraint on a London solar project is rarely roof space. It is far more often the available capacity on the local UK Power Networks circuit, which is why early grid engagement matters more in the capital than almost anywhere else.

The Greater London Authority’s net zero target and what it means for your project

The GLA’s 2030 net zero ambition sits behind a dense set of policy levers that touch commercial property directly. The London Plan requires major development to be net zero carbon, with solar PV explicitly named as a preferred on-site measure. For retrofit on an existing industrial unit, most rooftop solar falls under Permitted Development through Class A Part 14 of the GPDO 2015, so planning permission is rarely needed unless the building sits in a conservation area or is listed, both uncommon for industrial stock.

The London Energy Efficiency Fund and the Mayor’s wider energy programmes have historically focused on public buildings and social housing, so direct grants for private industrial solar are limited. The real financial driver in London is the cost of grid electricity itself. With commercial tariffs in the capital frequently above the national mean, every kilowatt-hour generated on your own roof and consumed on site avoids the full retail price, which is what pulls London paybacks below the figures seen in cheaper-energy regions.

There is also a procurement angle. London boroughs and the GLA increasingly weight tenders towards suppliers with auditable carbon reductions, and the capital’s blue-chip occupier base, finance, media, retail, applies the same pressure down its supply chain. For a London industrial operator serving those customers, on-site solar is becoming a contract-retention factor, not just an energy saving.

Local cost data, what London industrial operators actually pay

A London industrial unit of 30,000 to 80,000 sq ft typically spends £60,000 to £180,000 a year on electricity, with last-mile and cold-chain operators at the upper end because of round-the-clock running. Larger distribution buildings near the M25 corridor can spend well above £300,000. Against those numbers, a rooftop array sized to the daytime baseload often returns a meaningful share of the bill from the first year.

Indicative installed cost per kW for a London industrial unit in 2026:

• £850 to £1,150 per kW for systems below 100 kW, common on smaller multi-let units
• £750 to £950 per kW for systems of 100 to 500 kW, the typical single-unit warehouse band
• £700 to £880 per kW above 500 kW, for large distribution sheds

London projects can carry a modest premium over regional work because of access constraints, congestion charging on plant deliveries, and tighter site logistics. Set against that, the high local tariff usually more than compensates. Limited companies expensing the install under the 100% Annual Investment Allowance see an effective 25% reduction in net cost in year one. For more on financing routes and worked examples, see our cost guide, and review the grants and funding page for capital allowance and Freeport detail.

Grid connection is the item to watch. UK Power Networks covers most of London, and G99 applications for systems above 17 kW per phase can take several months in capacity-constrained inner boroughs. We submit the application immediately after the structural survey so the connection clock runs in parallel with the rest of the project.

A London install in practice, a Park Royal multi-let unit

Take a representative recent project: a 600 kW rooftop array on a Park Royal multi-let industrial building occupied by a food production tenant and a parcel logistics operator. The building is a steel-portal structure with around 6,000 sq m of usable flat roof, running ovens, chillers, and conveyor lines through standard daytime hours. Pre-install electricity consumption sat near 1.4 million kWh a year across the two tenancies.

The system uses roughly 1,100 panels feeding multiple string inverters tied into the building’s existing three-phase supply. First-year generation reached 540,000 kWh, in line with the yield model. Self-consumption ran close to 90% because the tenant load profile matches the solar curve so well, with only a small surplus exported under the Smart Export Guarantee. Annual savings landed near £108,000 in year one through avoided grid import at London tariffs, putting simple payback inside 5.6 years.

Beyond the bill, the landlord used the install to differentiate the units in a competitive London letting market, and both tenants now reference on-site renewable generation in their own customer sustainability reporting. That dual benefit, lower energy cost for the occupier and a more lettable asset for the owner, is a recurring theme in London where every commercial edge counts.

Postcodes and industrial areas covered across London

We deliver solar PV for industrial units across all London postcode areas:

• West London: W and parts of NW around Park Royal, Acton, and Wembley industrial stock
• North London: N postcodes including the Edmonton and Tottenham industrial corridors
• East London: E postcodes covering Stratford, Bow, Barking-side logistics, and the Lea Valley
• South East London: SE postcodes including Greenwich Peninsula, Charlton, and the Old Kent Road corridor
• South West London: SW industrial pockets and the routes towards Croydon
• Central: EC and WC for the rare commercial roofs in the City fringe

Most London sites are reachable for same-day survey visits, and our teams are experienced with the access, parking, and out-of-hours working that capital projects often require.

Other commercial areas adjoining London

London’s industrial property market spills well beyond the GLA boundary, and many of our clients run multi-site estates across the home counties. We also deliver solar PV for industrial units in:

• Croydon, town centre logistics and the Purley Way commercial corridor
• Bromley, light industrial estates serving south east London
• Dartford, the riverside logistics cluster along the A282 and Crossways
• Watford, north-west fringe distribution and trade-counter units
• Slough, the Slough Trading Estate, one of the largest privately owned trading estates in Europe

Each falls under a different council with its own climate plan, and the nearest major centres of Reading, Luton, and Brighton round out a service area where we run consistent design, install, and reporting standards across every site.

Get a free quote for your London industrial unit

We have delivered commercial solar across London and the home counties for years, and we know how the capital’s grid, tariffs, and access constraints shape a project. Every quote starts with a free desk-based feasibility study from your half-hourly meter data and roof drawings, with no site visit needed for the initial proposal. We will share an indicative system size, generation forecast, and return figure within 7 working days.

If the numbers stack up, our engineers carry out a one-day structural and electrical survey, then issue a fixed-price proposal with full yield modelling and financial analysis. Most London industrial installs run from first conversation to commissioning in around 6 to 9 months, with the UK Power Networks G99 connection usually the longest single item.

Whether you run a Park Royal food unit, an Old Kent Road yard, or a Stratford last-mile depot, we will tell you honestly whether your roof suits solar before you spend anything. When you are ready, request a quote and we will get the feasibility moving.