Agrivoltaics is growing crops or grazing animals under and between solar panels on the same land. It sounds like a compromise, and the interesting finding is that it often is not: the partial shade helps a real class of crops and cuts water loss, while the vegetation cools the panels, and a cooler panel makes more power. Same acre, two harvests, each improving the other.
Why it works both directions.
Plants stop gaining from extra light past their saturation point; the surplus arrives as heat and thirst. In hot climates, panel shade knocks the afternoon extreme off a crop's day, and the softer microclimate under an array holds soil moisture longer, which in dry country is the difference that matters.
The favor returns because photovoltaic panels lose output as they heat up, a fraction of a percent for every degree. Bare gravel under an array cooks it from below; transpiring plants cool it, the way a lawn is cooler than a parking lot. Panels over vegetation run measurably cooler and yield measurably more than panels over bare ground. Neither harvest is quite what it would be alone at its ideal; together they reliably beat the acre split in two.
What grows there.
Shade-tolerant crops are the fit: leafy greens, brassicas, many herbs, and berries that scorch in open July sun can prefer the panel rows. Full-sun row crops like corn are the wrong tenants. The working example at scale today is solar grazing: sheep keeping utility arrays mowed, a real and growing line of business for shepherds. And where farming under the panels is not the goal, pollinator plantings under arrays trade turf-mowing costs for habitat that the neighboring fields cash in as pollination.
The ten-minute tour.
With those words in your pocket (saturation, microclimate, panel cooling, solar grazing), this video is the right ten minutes on why the pairing works and where it is being tried at scale.
For a small operation.
For most growers reading this, agrivoltaics is a lens rather than a product: if an array is coming to your land anyway, the growing space under it is yours to keep or lose at design time. Two racking decisions decide everything and cannot be revisited later: panel height (clearance for the crop, the equipment, or the sheep) and row spacing (the light that reaches the ground between panels). Raising racking costs real money; re-racking costs a project. Ask the agrivoltaic question before the posts go in, not after. And graze or plant under any array only with the wiring done to code and the combiner boxes sealed; livestock and exposed DC do not mix.
The shortest version
Crops or grazing under solar panels, same acre. Partial shade suits shade-tolerant crops and holds soil moisture; transpiring plants cool the panels, which raises their output. Sheep under utility arrays are the working example. If an array is coming anyway, decide panel height and row spacing with growing in mind, because racking is forever.
Words to work from
Take these terms with you. They are the vocabulary of every agrivoltaics study, article, and lease.
- Agrivoltaics
- Agriculture and photovoltaics sharing one piece of land, on purpose.
- Dual-use
- The policy word for the same idea; the term zoning boards and grant programs use.
- Light saturation point
- Where more light stops helping a crop and starts costing it water. The reason shade can be a gift.
- Microclimate
- The cooler, moister, calmer conditions under an array, distinct from the open field beside it.
- Panel temperature coefficient
- How much output a panel loses per degree of heat. The reason plants under panels pay rent.
- Solar grazing
- Sheep keeping arrays mowed. The agrivoltaic business model already working at scale.
- Racking
- The structure holding the panels. Its height and spacing decide what can ever grow beneath.
- Row spacing
- The gap between panel rows, which sets the light reaching the ground between them.
Frequently asked questions.
What crops grow well under solar panels?
Shade-tolerant ones: leafy greens, brassicas, many herbs, and some berries, which in hot climates can do better under partial shade than in open sun. Full-sun row crops like corn and most grains are the wrong fit. The dependable non-crop answers are grazing forage and pollinator plantings.
Do solar panels damage the land under them?
The panels do not; construction can. Compaction from installation traffic and gravel-and-herbicide ground cover are choices, not requirements. Arrays planted and managed as pasture or pollinator ground keep living soil, and sheep-grazed arrays are farmland with steel shade structures on it. What the ground under an array becomes is decided in the site plan.
Can I graze animals under solar panels?
Sheep, routinely: solar grazing is an established service business, and arrays are commonly leased to shepherds. Cattle need purpose-built high racking, and goats are a byword for chewed wiring. Grazing any array assumes the wiring is to code, boxes are sealed, and cable runs are out of reach.
Does agrivoltaics actually pay?
Counted on one ledger, usually yes: the combined value of somewhat-reduced yields from both harvests generally beats splitting the acreage between them, before adding the quieter lines like grazing fees, reduced mowing contracts, water savings, and cooler-panel output. The honest caveat is that each site's crop, climate, and racking height set the numbers.