Solar panels for cold storage in London

A guide to cold storage solar in London and the wider Greater London area, including Croydon, Bromley, Dartford.

Why solar PV makes sense for London cold storage operators

London is the single largest cold chain market in the UK, and not by a small margin. The capital’s nine million residents, its restaurants, hospitals, supermarkets and the foodservice trade that feeds the City and the West End all depend on refrigerated and frozen stock moving through warehouses ringed around the M25 and tucked inside the inner-London industrial estates. Those buildings run their compressors and condensers around the clock, and electricity is by far the largest line on their operating budget. That is exactly the profile that makes solar work hardest. A cold store consumes nearly everything its roof can produce, so almost every kilowatt-hour you generate displaces grid power at the full London retail rate rather than being exported cheaply.

A typical refrigerated facility serving the capital spends well into six figures a year on grid power, and a London SME cold store can easily sit above the £95,000 mark the wider commercial market averages. Every percentage point of self-consumption you capture from a rooftop array is money kept out of an energy bill that only goes one direction.

London’s cold chain geography, where the roofs are

The capital’s refrigerated warehousing clusters in a handful of industrial pockets, and each has its own character for solar. Park Royal, straddling Ealing, Brent and Hammersmith and Fulham, is London’s largest industrial estate and the beating heart of London’s food production and chilled distribution. It hosts a dense concentration of food manufacturers, caterers and cold stores serving the West End and the airports. The buildings here range from older heritage units with asbestos cement roofs that need a combined re-roof before solar, to modern composite-panel cold stores that are near-ideal for a non-penetrating ballasted array.

Greenwich Peninsula and the Old Kent Road industrial area carry the inner south-east London cold chain, with last-mile chilled depots and food logistics operators serving central London restaurants and the rapid-grocery sector. Stratford and the wider Lower Lea Valley host distribution serving east London and the Olympic-legacy growth corridor, while Brent Cross anchors north-west London logistics. Beyond the boroughs, much of the heavy cold storage that supplies London actually sits just outside the boundary, around Dartford, Slough and the Watford gap, and many London operators run multi-site portfolios that span the capital and these edge-of-M25 hubs.

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

The Greater London Authority has set a target for London to reach net zero by 2030, a full 20 years ahead of the national statutory deadline. For a cold storage operator, the Mayor’s current planning position on rooftop renewables is worth checking directly.

For a cold store operator this matters in two practical ways. First, in England, roof-mounted solar on a non-domestic building is normally permitted development under Class J of Part 14 of the GPDO 2015; an array above 50 kW needs the council’s prior-approval decision on design and external appearance, including glare. A cold-store array is usually above 50 kW, so that decision should be planned for, but planning is rarely the main obstacle. Second, UK Power Networks connection timescales in the capital remain the main item on any project programme for a large rooftop array.

Local cost data: illustrative figures for London cold storage

A mid-sized London refrigerated facility typically spends £90,000 to £400,000 a year on grid electricity, with the largest multi-temperature distribution hubs serving the supermarket trade running well above that. Network charges (TNUoS and BSUoS) are a component of the delivered electricity price and change each year; every kilowatt-hour generated and used on site avoids both the energy and network components, which matters to any 24/7 operation.

For a London cold store solar install in 2026, indicative cost per kilowatt sits at:

• £750 to £950 per kW for systems of 400 to 800 kW, the single-facility range used in the illustrative model (a modelling assumption, not a quote or a market survey)
• £700 to £850 per kW for systems above 1 MW at the larger distribution hubs, also an illustrative modelling assumption
• A premium where high roofs need mobile elevated work platforms, common in the denser inner-London estates

Illustratively, a London limited company installing under the 100% Annual Investment Allowance could see an effective tax saving of up to 25% in year one. Our cost guide breaks down the full picture, and the grants and funding page covers how the allowances stack with other routes such as Freeport, which are worth checking. The Industrial Energy Transformation Fund closed in July 2025 and no successor fund is planned, so it cannot be counted on; check GOV.UK for any scheme open now. The binding constraint in London is rarely roof area, it is the UK Power Networks G99 connection, which on capacity-constrained inner-London networks can run several months. The G99 application is normally submitted immediately after the survey to start that clock early.

An illustrative London example, a Park Royal chilled distribution facility

Consider a chilled distribution facility in Park Royal supplying London’s foodservice and restaurant trade. The building is a modern composite-panel cold store of around 4,800 square metres, running multi-temperature chambers 24 hours a day to service early-morning deliveries into central London. Annual grid consumption sits near 1.1 million kWh, with a heavy overnight baseload from continuous refrigeration.

In this illustrative example, a 620 kW rooftop array across the usable roof would be expected to generate roughly 560,000 kWh a year in the London climate. Because the refrigeration load never stops, the illustrative model assumes about 90% of that generation is used on site (to be tested against twelve months of half-hourly meter data), so most of it displaces grid electricity at the full retail rate. At an assumed current London tariff that would be expected to save in the region of £130,000 a year, putting simple payback inside five years in the site’s simple model (not a quote). A design like this would typically use a non-penetrating ballasted mount to protect the insulated roof envelope, with structural loading checked against the building’s capacity; ask the site’s insurer and a fire-protection engineer about roof loading, clearances and sprinkler compatibility before design.

Postcodes and industrial areas across London

Cold storage solar is relevant across all London postcode areas, with the heaviest demand in the industrial belts:

• West: W and parts of NW around Park Royal, the capital’s largest food and cold chain cluster
• North: N and NW around Brent Cross and the Edmonton and Tottenham industrial corridors
• East: E around Stratford, the Lower Lea Valley, and the Barking and Dagenham logistics estates
• South-east: SE around Greenwich Peninsula, the Old Kent Road industrial area, and Charlton
• Central and city fringe: EC and WC for smaller chilled units serving the central restaurant trade

On busy inner-London estates, access and logistics for roof work need planning so that installing does not interrupt the cold chain.

Other cold storage areas adjoining London

A great deal of the cold storage that feeds London sits just beyond the GLA boundary, and many operators run sites on both sides of it. Refrigerated warehouse solar is also relevant in:

• Dartford, the Crossways and Thames-side logistics estates feeding south-east London
• Slough, the Slough Trading Estate, one of Europe’s largest, with significant food and chilled logistics
• Watford, north-west London’s distribution gateway on the M1 corridor
• Croydon and Bromley, south London’s last-mile and chilled depot concentration
• Reading and the wider Thames Valley, where M4 corridor cold chain supplies the western approaches to the capital

Each falls under a different local authority, so a portfolio spanning them can face different local requirements from site to site.

Frequently asked questions about London cold storage solar

Is London electricity expensive enough to make solar on a cold store worthwhile? It can be, on the site’s illustrative model. A 24/7 refrigerated facility tends to use most of what a rooftop array produces, and every kilowatt-hour generated and used on site displaces grid electricity at the full retail rate. Higher grid prices mean a shorter payback; the site’s simple model gives illustratively four to five years for a London cold store (assumed tariff and self-consumption; not a quote).

How long does UK Power Networks take to approve a grid connection in London? UKPN is the DNO across most of London, and G99 connection timescales on capacity-constrained inner-London networks can run several months. The G99 application is normally submitted immediately after the structural survey to start the clock as early as possible, since the connection is usually the longest item on the programme.

Can I install solar on a cold store I lease in Park Royal or Slough? Yes. Tenant-installed solar is standard practice and needs landlord consent, which most institutional landlords grant under the BBP Green Lease Toolkit framework. For shorter leases a power purchase agreement that shifts the asset risk to a third party is often the better fit. Engage the landlord early.

Will installation disrupt our refrigeration? No. The roof installation happens above your operations, so the cold chain, picking and despatch carry on as normal. The only outage is usually a few hours for final grid synchronisation, which is normally scheduled for a weekend or planned shutdown.

Send an enquiry about your London cold storage solar project

This guide covers commercial solar across London and the M25 cold chain belt, from Park Royal to the Old Kent Road, from Stratford to Slough. A sound first assessment is a desk-based feasibility study built from half-hourly meter data and roof drawings, with no site visit needed at that stage, and it gives an indicative system size, a generation forecast and an internal rate of return.

If the numbers work, the next steps are normally a structural and electrical survey and then a proposal with full yield modelling and contract terms from whoever you appoint. A sound proposal says plainly whether a cold store suits solar, including the roof condition and the grid connection position. Send an enquiry and we reply by email.