Solar panels for cold storage: clean power for round-the-clock refrigeration
Solar panels for cold storage can make financial sense on a building that runs round the clock, and the reason is simple: a refrigerated or chilled facility never switches off. Whether you run food, pharmaceutical or wider cold-chain logistics, the compressors, condenser fans, lighting and controls draw power day and night, so much of the electricity your panels generate tends to be consumed on site rather than exported at a lower price. Self-consumption is the single biggest driver of solar payback, and the illustrative model assumes a high share of generation, about 90%, is used on site; test that against twelve months of half-hourly meter data. Network charges (TNUoS and BSUoS) are a component of the delivered electricity price and change each year, and every kWh generated and used on site avoids the energy and network components. With customer Scope 2 and Scope 3 mandates flowing through to operators, on-site solar can also provide auditable evidence of carbon reduction.
How a cold-storage system is sized
A refrigerated warehouse system is usually designed in the 400 to 1,800 kW range, roughly 740 to 3,300 panels across about 2,400 to 10,800 square metres of roof. A system that size would be expected to generate in the region of 370,000 to 1.65 million kWh a year and save between 85 and 380 tonnes of CO2 annually in the illustrative model. Cold storage is a building type where the array tends to be sized against the baseload rather than the roof, because round-the-clock refrigeration tends to give a high self-consumption share. The first step is to pull the half-hourly meter data to confirm the load. Roof area is rarely the binding constraint; the real limits are the existing baseload and DNO capacity. Because cold stores are typically built from insulated panel construction, the mounting approach must protect that thermal envelope, which can shape the layout.
Costs, payback and tax relief
In the site's illustrative model, a cold-storage project lands between £280,000 and £1.45m depending on size, at an illustrative £700 to £900 per kW (a modelling assumption, not a quote or a market survey). Simple payback in that model is illustratively around 4.5 years (assumed tariff and self-consumption; not a quote), after which the modelled saving continues for the rest of the system's life. The biggest lever is tax: solar PV qualifies as plant and machinery, so the 100% Annual Investment Allowance lets most systems be claimed in full in year one up to the £1m cap, with a 50% First Year Allowance on qualifying spend above that, subject to current legislation. For a limited company that relief can be worth up to a quarter of the project value back as tax in year one; the figures are illustrative. Because the model assumes a cold store uses most of what it generates on site, the return is driven by avoided import; the Smart Export Guarantee applies to generators up to 5 MW, the supplier sets the export rate, and it is a minor line for a 24/7 load because little is exported, so compare each supplier's published SEG tariff. Our cost guide works through the numbers by system size.
Funding routes for cold-storage operators
The Industrial Energy Transformation Fund (IETF), operated by DESNZ, closed in July 2025 and no successor fund is planned, so it cannot be counted on; check GOV.UK for any scheme open now. Capital allowances are the core relief, and a Freeport or Investment Zone may offer enhanced capital allowances, so it is worth checking whether the site falls inside one. Tenants can use the Green Lease Clause route, supported by a BBP-aligned lease addendum, which unlocks installation on a leased building. The full set of routes is on our funding routes page.
Compliance and sector considerations
Two compliance points are specific to cold storage. First, F-gas Regulation 2014/517 governs the refrigeration plant, and a sound design works with any heat-pump retrofit rather than against it. Second, roof penetration design must protect the integrity of the insulated panel construction, because a poorly detailed fixing is a thermal-bridge, condensation and watertightness risk. Beyond that the standard logistics regime applies: ask the site's insurer and a fire-protection engineer about roof loading, clearances and sprinkler compatibility before design; permitted development under Class J of Part 14 of the GPDO 2015 in England (an array above 50 kW needs the council's prior-approval decision on design and external appearance, including glare); a G99 grid application and the network operator's approval before connecting; and wind loading designed to BS EN 1991-1-4. Customer and audit schemes may ask about energy use and resilience; check the relevant standard.
How a cold-storage project is approached
Cold storage is best treated as a specialism, not a variation on an ambient warehouse. A sound project sizes the system from the half-hourly meter data, carries out a roof and structural check with a wind-load assessment, and pays particular attention to insulated-panel construction. The G99 grid application is submitted early so the DNO clock runs in parallel with design, the site's insurer and a fire-protection engineer are asked about roof loading, clearances and sprinkler compatibility before design, and a written proposal with a clear workmanship warranty is worth asking for. The build can happen above live operations, with the only outage being the short final grid synchronisation, so the cold chain need not be broken.
An illustrative worked example
As an illustrative composite, and not a real named client: a family-owned operator running a 24/7 cold-storage facility with an energy spend near £390,000 a year could install around 782 kW of roughly 1,440 panels, expected to generate about 725,000 kWh a year. Self-consumption is assumed near 92% in this example on the constant refrigeration load (to be tested against meter data), and the annual saving would be expected to sit around £187,000 for an illustrative payback close to 4.3 years. These figures are purely illustrative and depend on your site, roof, load profile, tariff and lease. If your cold chain spans dedicated chilled handling and broader logistics, see cold chain warehouse solar and distribution centre solar. When you are ready, read the cold storage solar FAQs, then send an enquiry; we reply by email.
