Agrivoltaics – using the same land for solar generation and agriculture – has moved from research to deployment in parts of Europe and the US, helped by policy that favours dual use over displacing farmland.
It works genuinely well in some configurations and is largely presentational in others. The difference is worth understanding before committing.
Many crops do not use full sunlight efficiently. Above a saturation point, additional light produces no additional photosynthesis, and in hot conditions excess irradiance causes heat and water stress that actively reduce yield.
Partial shading can therefore improve outcomes for shade-tolerant crops, particularly in hot, dry regions: reduced soil evaporation, lower plant stress, less irrigation demand. Panels also provide shelter from hail and heavy rain.
The panels benefit too. Vegetation beneath keeps ground temperature lower than bare soil or gravel, and cooler modules are marginally more efficient.
Elevated arrays over crops. Panels mounted several metres up on widely spaced rows, allowing machinery beneath. Expensive structurally, and the configuration most genuinely dual-use.
Vertical bifacial rows. Panels mounted vertically, often east-west facing, in widely spaced rows with cultivation between. Produces a distinctive twin-peak generation profile – morning and afternoon rather than midday – which can suit grid value and consumption profiles better than conventional south-facing arrays. Land occupation is low and machinery access is straightforward.
Grazing under conventional arrays. The simplest and most widely practised. Sheep grazing beneath standard ground-mount solar is genuinely common, provides vegetation management more cheaply than mowing, and requires little design change beyond cable protection and adequate clearance.
Pollinator and biodiversity planting. Managed habitat beneath and between arrays. Not agriculture in a productive sense, but it delivers real ecological value and often satisfies planning conditions.
Standard close-packed ground-mount arrays at low clearance, described as agrivoltaic because sheep occasionally graze there. Row spacing and height are set for solar yield, shading is heavy, and machinery access is impossible. Nothing is wrong with the solar – it is just not dual use, and calling it that invites scrutiny.
Similarly, high-value crops requiring full sun. Shade reduces yield, and the agricultural loss can exceed the solar gain.
Agrivoltaic configurations generate less electricity per hectare than conventional layouts – wider spacing, sometimes suboptimal orientation – and cost more per kW because of elevated structures.
So the case usually depends on one of three things:
Absent all three, conventional layout on less productive land is usually the better project.
If you hold unused land adjacent to industrial premises – buffer strips, former storage areas, land banked for expansion – the dual-use question is usually simpler. The relevant comparison is against doing nothing.
Grazing or pollinator planting under a conventional array delivers vegetation management, biodiversity credit for reporting, and frequently smoother planning consent, at close to zero additional cost. That is a reasonable outcome without needing to claim it is transforming agriculture.