Livestock Farms (Beef/Sheep/Pig/Poultry): Solar panels for dairy farms

Why the wider livestock side of a dairy estate suits solar

Plenty of dairy businesses run other stock alongside the milking herd, whether that is beef finishing on the back of dairy-bred calves, a sheep flock on the grazing, or a separate pig or poultry enterprise as a diversification. Those livestock buildings are usually large, simple and structurally well suited to PV, and the loads are genuine, so they add to the solar case a dairy is already making with its parlour. Free-range egg and broiler operations align especially well with the summer solar peak, when ventilation runs hardest and generation is highest. At the other end of the range, beef yards and sheep enterprises with lower building demand often do better with a ground-mount or a shared array that also serves the dairy. The point is that the livestock side of a dairy estate gives you more roof, more load and more options to spread a single solar investment across.

The livestock buildings on a dairy estate also tend to be exactly the kind of structures that suit PV best: large, modern, clear-span steel-framed sheds with simple pitched roofs and no awkward valleys or rooflights to work around. A broiler or pig shed of that type can carry a substantial array with a straightforward mounting system, and because the roof was built to a known engineering standard the structural survey is usually quick and the result predictable. That contrasts with some older, lower farm buildings where the roof structure limits what can safely be carried. On a mixed dairy and livestock holding, the first step is to identify which roofs are genuinely good candidates and which would need strengthening or a reclad, so the investment goes onto the buildings that will repay it fastest.

What a typical livestock install looks like and how it is sized

Sizing follows the building and the load behind it. A beef yard with modest demand is better matched to a smaller array, or to a ground-mount that also feeds the parlour and the bulk tank, so no generation is wasted. Half-hourly data should be used so the system matches what the unit genuinely draws rather than an optimistic nameplate maximum, and on a mixed farm the livestock and dairy loads should be looked at together so the generation is always being used somewhere on the holding. Pig units, with high winter heating and summer ventilation, often suit a system tuned to year-round demand, while poultry sheds peak with the summer sun.

Costs, payback and tax relief

The 100% Annual Investment Allowance lets most farm businesses write off the full cost against profit in year one across the combined dairy and livestock operation, so the relief is felt immediately rather than spread over years. The Smart Export Guarantee pays for any surplus at a few pence to about 12-13p per kilowatt hour, although a high-baseload poultry or pig unit exports relatively little. For intensive units with very high self-consumption the return is driven by avoided import rather than export, which is the stronger position to be in, and it mirrors exactly how the dairy parlour itself pays back. See the cost guide for worked figures by shed type, including how the economics differ between a constant poultry load and a seasonal beef yard.

That spread is precisely why each building should be modelled on its own load rather than applying a single farm-wide figure. Where a beef yard's own demand is too low to justify filling its roof, a smaller array that the parlour and tank can absorb, or a ground-mount that serves the whole holding, is often the better answer, so the capital is never tied up in panels whose output has nowhere economic to go. The combined relief under the Annual Investment Allowance across the whole farm business means even a slower-paying livestock array still benefits from immediate tax treatment in the year it is installed.

Funding routes in detail

The 100% Annual Investment Allowance is the universal route, expensing qualifying plant in year one up to the one million pound cap, which covers almost every livestock shed install on a farm of this kind. The Smart Export Guarantee pays a few pence to about 12-13p per kilowatt hour for export, though high-baseload poultry and pig units export little because they consume their own generation. Farm grant schemes open and close, and none of the English schemes we read in October 2026 listed solar PV; the dairy farm solar grants page lists each route with its status and the date we read it.

Compliance and sector considerations

Animal welfare regulations are unaffected by a rooftop install, but biosecurity governs how the work is done. Boot dips, restricted access and cleaning protocols apply throughout, and access routes should be planned to keep the install away from clean areas and away from the milking parlour where the two enterprises share a yard. In England, rooftop solar on a farm building is generally permitted development under Class J of Part 14 of the GPDO 2015, not the householder Class A, subject to the Class J limits. In Wales, solar PV on a non-domestic building falls under Part 43, Class A of the Welsh general permitted development order, and in Scotland under Class 6J of the Scottish order; each has its own limits and exclusions, so check the rules for your building before relying on permitted development. As with the dairy buildings, pre-2000 sheds often have asbestos cement roofs, so an asbestos survey comes first, and the roof is often over-clad or replaced before panels go on. A G99 grid application is needed above 16 A (3.68 kW) per phase, and rural networks are frequently capacity-constrained, so an early connection study matters. When comparing installers, ask for their MCS certificate number and check it on the MCS database, and check NICEIC, RECC and TrustMark membership with the issuing bodies. SEO Dons Ltd publishes this site and does not install.

Where to go next

If the milking herd is the priority, see solar for dairy farms, and if you crop as well see arable farm solar. Compare the numbers on the cost guide and the grants and funding page, then send an enquiry or read the dairy solar FAQs.