Agrivoltaic / Mixed Use: Solar panels for dairy farms

Agrivoltaics: solar and dairy grazing on the same ground

Agrivoltaics means generating solar power and farming the same ground at once, and for a dairy farm with a grazing platform or marginal pasture it is the most ambitious option on the table. Sheep grazing beneath elevated panels is the established UK approach, and a grazing flock or dairy youngstock can keep the grass managed under and around the rows while the array generates above. It answers the food versus energy objection directly, because the land keeps producing while it also generates, and that dual-use narrative is increasingly valued by both policymakers and the supermarket buyers behind your milk contract, who do not want to be seen taking productive farmland out of food. For larger dairy holdings with land that is marginal or underused, agrivoltaics is the most transformative solar option for farm income, capable of earning from the same acres twice over.

The policy direction supports it. Defra and the NFU are actively engaged, and the Sustainable Farming Incentive is expected to add clearer agrivoltaic and biodiversity alignment over time, which lets generation income stack with environmental payments on the same hectares that already carry part of the dairy enterprise. As a content area it is still underdeveloped in the UK, which means a well-evidenced dual-use scheme can be put together carefully and defended robustly when it goes to planning.

For a dairy farm specifically, agrivoltaics has an appeal beyond the income. It lets you keep marginal or outlying land in genuine agricultural use, with stock grazing beneath the panels, rather than taking it out of production altogether the way a conventional solar field would. That matters for the milk contract, because the same supermarket buyers who ask for evidence of lower-carbon milk are wary of suppliers who simply convert farmland to energy, and a dual-use scheme that keeps sheep or youngstock grazing answers that concern directly. It also keeps the land within the kind of management that supports an SFI agreement, so the environmental income and the generation income can sit on the same hectares rather than competing for them. The result is a model that fits a working dairy far better than a straightforward ground-mount field would.

What a typical agrivoltaic scheme looks like and how it is sized

Agrivoltaic schemes are large, generally 500 kW to 10 MW and beyond, roughly 920 to 18,400 plus panels on ground-mount structures designed to allow grazing or cultivation underneath. Generation varies widely with layout, panel height and the farming use below, so we model each scheme individually rather than quote a standard yield. Sheep grazing under elevated panels is the most established approach in the UK and the simplest to deliver on a dairy holding; crop agrivoltaics with translucent panels is newer, and we recommend a trial area before committing the whole site. On a dairy farm we look carefully at how the scheme sits relative to the milking platform, so the array uses ground that is genuinely surplus to the herd's grazing needs and does not pull productive grazing away from the cows. Panel height, row spacing and access are all designed around the stock that will graze beneath.

The engineering choices in an agrivoltaic scheme are driven as much by the farming use as by the generation. Raising the panels higher and widening the rows lets larger stock and machinery move underneath and lets more light reach the grass or crop below, but it adds cost and reduces the density of generation per acre; lowering and tightening the array maximises output but suits only sheep and lighter management. There is no single correct layout, only the one that balances generation against the farming use you actually intend, which is why we design from the grazing or cropping plan first and fit the array to it rather than the other way round. For a dairy that wants youngstock or a flock to keep the sward in check, that means a taller, more open structure; for pure sheep grazing on marginal ground, a more conventional elevated array will often do.

Costs, payback and tax relief

Capital projects run from around £350,000 to £8 million plus with paybacks near 7 years where you own the system, but many farms instead lease the land to a developer who funds and operates the array and pays rent, typically £900 to £1,300 per acre per year, comfortably above arable rental value, while the farm continues to graze beneath. Either way the land earns twice over. Ownership can draw on the 100% Annual Investment Allowance for qualifying plant, with relief on larger schemes planned across more than one tax year, and the Smart Export Guarantee covers export from an MCS-certified scheme up to 5 MW. The lease route shifts all the capital and operational risk to the developer, which suits a dairy that would rather invest its capital in the milking enterprise. Our cost guide compares the ownership and lease routes side by side.

The choice between owning and leasing an agrivoltaic scheme is the central financial decision, and it turns on what you want from the land and the capital. Owning the array gives you the full value of the generation, the tax relief and a self-generated supply you can route to the dairy or sell under the Smart Export Guarantee, but it ties up a large sum and brings the responsibility of operating and maintaining a substantial installation for decades. Leasing the land hands all of that to a developer in return for an index-linked rent, typically well above arable rental value, with none of the capital outlay and none of the operational risk, while you carry on grazing beneath. For a working dairy that needs its capital for cows, robots and buildings, the lease is often the more comfortable fit, but a farm with capital to deploy and a strong on-site load may earn more by owning. We model both on your own numbers so the decision rests on the figures rather than on a single attractive rent per acre.

Funding routes in detail

Where you own the array, the 100% Annual Investment Allowance expenses qualifying plant up to one million pounds per year, with relief on larger schemes planned across more than one tax year rather than lost. The Smart Export Guarantee pays four to fifteen pence per kilowatt hour for export, and agrivoltaic schemes typically export a large share of generation because the on-site load is small relative to the array. The Sustainable Farming Incentive is the key stacking opportunity here, because biodiversity and grassland actions at roughly five hundred to five thousand pounds per hectare per year can run alongside the lease or generation income on the same dual-use land, which is precisely the strength of the agrivoltaic model. The Farming Investment Fund is less directly relevant to ground-mount but worth checking on the wider farm. Welsh and Scottish dairy farms should check the devolved schemes, which often carry higher intervention rates than England.

Compliance and sector considerations

Agrivoltaic schemes need full planning permission, and an Environmental Impact Assessment is required above 5 MW. Because these are visible, large projects, early engagement with the local authority, the NFU and the local community matters, and a well-evidenced dual-use case that keeps the land in dairy grazing carries real weight with planners who are wary of losing food-producing land. Tenant dairy farmers need landlord consent for any change of land use, and most institutional landlords have standard agreements; we provide the addendum for private landlords. Grid capacity is the usual constraint, so a G99 connection study early in the process is essential before final sizing. Animal welfare and grazing management under the panels follow normal practice, with the array designed to allow stock access, shelter and routine handling. We hold MCS commercial certification, NICEIC, RECC and TrustMark. Community and stakeholder engagement is a larger part of an agrivoltaic project than of any rooftop install, because a visible ground-mount array invites scrutiny in a way that panels on a parlour roof never do; presenting it clearly as dual-use land that keeps stock grazing and stacks with environmental actions, rather than as farmland lost to energy, is usually the difference between a scheme that progresses smoothly and one that meets local resistance, and we help frame that case with the evidence to support it.

How we approach this kind of project

We start by separating the land that is genuinely surplus to the milking platform from the ground the herd needs, so the scheme never compromises grazing or forage production. We model ownership against a developer lease and set out both clearly, including the risk and capital implications of each. We engage the DNO with a connection study early, manage the planning and environmental work, and design the array around the grazing use beneath it, with panel height and spacing chosen for the stock that will run under it. You receive a fixed-price proposal where you own the system, and the install carries an insurance-backed workmanship warranty.

An illustrative example

As an illustrative composite based on typical UK schemes, and not a real named client or real project: a dairy farm with marginal pasture beyond its grazing platform entered a 25-year lease with a UK developer for an elevated ground-mount array of around 1.8 MW, roughly 3,300 panels, with sheep grazing year-round beneath. The base rent sat near £1,200 per acre per year with a ratchet, SFI biodiversity actions stacked on top, and the land stayed in agricultural use throughout while the dairy buildings carried a separate rooftop array sized for the parlour. The figures are illustrative and depend on your land, grid position and the developer terms available in your region, which is why we model both routes before you commit.

For rooftop-led options on the milking side, where the parlour and tank load drives the fastest payback on the farm, see solar for dairy farms, or arable farm solar for grain-store and machinery-shed roofs. Compare the routes on the cost guide and the grants and funding page, then request a free feasibility for your land and grid position, or read the dairy solar FAQs for the questions farmers most often raise about dual-use schemes.