Capital allowances and business rates for cold store solar

Funding solar panels for cold storage in 2026

Cold-chain operators have several routes to consider when paying for a solar array. Refrigerated and chilled facilities can use funding and tax routes, and the combination can take a meaningful slice off the net cost of a project. This guide sets out the routes that apply to solar panels for cold storage in 2026, what each is worth, and which ones are specific to the cold chain.

A quick word on framing before the detail. With an illustrative payback of around 4.5 years in the site’s simple model (assumed tariff and self-consumption; not a quote), funding is not what makes a cold-storage project work. It is what can improve the case further. The routes below can stack, so the right answer is usually a combination rather than a single scheme.

Capital allowances: the main tax route

The most important relief is not a grant at all, it is the way solar PV is treated for tax. Solar qualifies as plant and machinery for UK businesses, which brings two allowances into play.

• 100% Annual Investment Allowance (AIA). Up to £1m of qualifying spend can be deducted in full in the first year. Most cold-storage systems sit within or close to this cap, so a large part of the system can be written off against profit immediately.
• 50% First Year Allowance (FYA). On qualifying spend above the AIA cap, half can be claimed in year one, subject to current legislation.

For a limited company the Annual Investment Allowance and the 50% first-year allowance together can be worth, illustratively, up to a 25% effective tax saving in year one. That figure is illustrative and depends on your profit position, but the principle is solid: the allowance reduces the after-tax cost and so shortens the modelled payback. The official capital allowances guidance sets out the current rules, and a sound proposal models the year-one position so you can see the after-tax cost rather than the sticker price. Our cost guide walks through how the relief lands by system size.

The Industrial Energy Transformation Fund: now closed

The Industrial Energy Transformation Fund (IETF), operated by DESNZ, supported energy-efficiency and decarbonisation projects. It 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 practical advice is simple. Do not build a funding plan around the IETF; before you commit, check GOV.UK for any energy-efficiency or decarbonisation scheme open now, because a live grant can be large enough to change the whole economics of a project.

Smart Export Guarantee: small but worth claiming

The Smart Export Guarantee (SEG) pays you for surplus electricity exported to the grid, and it applies to generators up to 5 MW, with each supplier setting its own export rate. Compare each supplier’s published SEG tariff.

For most cold stores the SEG is a minor line, not a pillar. A 24/7 refrigeration load uses a high share of what the panels generate on site (the illustrative model assumes about 90%; test that against half-hourly meter data), so there is little surplus left to export. It is genuinely worth more for shift-pattern operations that go quiet overnight, where a larger share of generation spills back to the grid. It is still worth registering any eligible system for it, because it costs nothing to claim and it captures real value from whatever you do export.

Freeport and Investment Zone allowances

Location can unlock an extra layer of relief. Buildings inside a designated UK Freeport or Investment Zone may qualify for enhanced capital allowances on new plant and machinery, which is worth checking for any qualifying capex.

The current Freeport sites are Freeport East (Felixstowe and Harwich), Liverpool City Region, Plymouth and South Devon, Teesside, Solent, Thames, Humber and East Midlands. Cold storage clusters heavily around ports and major logistics corridors, so some refrigerated facilities may sit within these zones without the operator realising an allowance could be available. Operators can check Freeport and Investment Zone status for their own site, and the UK Freeport programme lists the current designations. Always confirm current eligibility, because the boundaries and rules evolve.

The green-lease route for tenants

Many cold-storage operators occupy their building on a lease rather than owning it, and that raises an obvious question: can you install solar on a building you do not own? The answer is yes, and the green lease clause is the mechanism.

This is not a grant. It is the contractual route that lets a tenant install solar with the landlord’s cooperation, with clear treatment at the end of the lease. It is increasingly standard in UK industrial property leases, and the Building Better Partnership maintains the BBP Green Lease Toolkit as the industry-standard template. A tenant can use a lease addendum aligned with that toolkit, agreed with the landlord directly, so a leasehold cold store need not be a barrier to going ahead. For shorter leases, a power purchase agreement can shift the asset and its tax position to a third party instead, which suits operators who do not want the capex on their own balance sheet.

How the routes stack for a cold store

In practice a cold-storage project rarely relies on one route. A typical funded case combines the Annual Investment Allowance, SEG registration for any surplus, and Freeport allowances if the site sits in a zone; the IETF closed in July 2025 and no successor fund is planned, so it cannot be counted on. A leasehold operator layers the green-lease addendum on top so the installation can proceed at all.

The right mix depends on your ownership position, your location and your tax profile, which is why a funding plan is best worked out alongside the system design rather than bolted on afterwards. You can see the full set of routes laid out on our grants and funding page, compare the underlying economics on the cold chain warehouse solar page, and if you have a question about your own facility, send an enquiry and we reply by email.