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Yes—sheep can usually graze safely beneath utility-scale solar arrays when the site is designed and operated for livestock. Their height generally fits standard panel clearance, and managed grazing can replace some mowing and herbicide work. Safety is not automatic, however. The solar operator and grazier must control electrical and moving equipment, build livestock-compatible fences, provide reliable water and forage, use a veterinarian-led flock-health plan, and put responsibilities in a written agreement.
Why sheep are used under solar panels
Sheep are the best-established livestock fit for many standard utility-scale arrays because their size normally works with the clearance beneath panels. The arrangement can produce two outputs from one site: sheep products and solar electricity. The U.S. Department of Energy (DOE) reports that grazing can reduce mowing, herbicide and other vegetation-management work, while shepherds may be paid for providing that service. University of Wisconsin Extension describes possible income from land access and vegetation management for graziers.
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The scale is no longer experimental in the narrow sense. NREL InSPIRE data cited by DOE recorded more than 4,000 MW of U.S. solar generation with sheep grazing underneath as of November 2023. That figure describes capacity associated with grazing, not a guarantee that every array is suitable or that grazing is profitable at every location.
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Safety depends on the interaction between animals, electricity, vehicles and equipment. A site that works for sheep on paper can still fail if wires are exposed, a tracker sweeps through a trough, a gate blocks a service lane, forage is depleted, or nobody knows who responds to an escaped flock. Treat grazing as an operating system for the whole solar site, not as a temporary fence placed around panels.
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Assess the array before any sheep arrive
Do the first inspection with the solar operator, the grazier and, where possible, the person responsible for electrical and vegetation maintenance. Walk every row rather than relying on a plan drawing. Record hazards on a map that both parties can use during an emergency.
- Map the physical layout. Mark panel rows, tracker arcs, inverters, transformers, substations, buried and exposed cable routes, gates, drains, steep ground, culverts, vehicle lanes, laydown areas and likely shelter locations.
- Define no-graze zones. Exclude electrical compounds, moving machinery, service clearances, unstable slopes, open drains, construction areas and any location the operator identifies as unsafe. Mark them visibly in the field and on the shared map.
- Check clearances and movement. Confirm the lowest panel edge, the full range of any tracker, and the space needed for maintenance vehicles. A trough or mineral feeder that is safe at one tracker angle can become an obstruction at another.
- Trace cable protection. Identify every place a sheep could reach a cable, conduit, junction box or grounding component. The DOE advises that wires should be properly encased to prevent animal interaction. Do not assume a buried route is safe if erosion, digging or future maintenance could expose it.
- Plan access. Keep gates, emergency routes and service lanes usable by the operator, fire crews and veterinary vehicles. Decide which gates remain locked, who holds keys, and how access is logged.
- Document the baseline. Photograph panels, fences, gates, cables, equipment and ground conditions before turnout. This record helps distinguish pre-existing damage from a later incident.
Electrical, tracker and fire controls
Protect cables and electrical equipment
All conductors that animals could contact should be properly encased, with the enclosure selected for the solar design and local electrical requirements. Keep sheep away from inverters, transformers, switchgear and substations unless the operator has specifically engineered and approved access. Never use an electrical enclosure, cable tray or panel support as a tie point for a fence, shade cloth, feeder or water line.
Ask the operator to explain how the array is isolated in an emergency. A grazier should know which equipment can remain energized, who is authorized to de-energize it, and how to verify that a work area is safe. Livestock workers should not open electrical cabinets or attempt repairs.
Keep moving trackers clear
Tracker arrays create a moving exclusion zone. The fence line, troughs, mineral feeders and temporary shade must remain outside the travel envelope and maintenance clearance. Do not attach any item to a tracker or its moving components. If the operator changes the tracker operating range, updates the control software or installs new equipment, repeat the walk-through before sheep return.
Prevent vegetation fires
Coordinate mowing, herbicide applications and other vegetation work with the grazier. DOE warns against burning vegetation under or around panels because fire can damage equipment and create electrical hazards. A written site rule should prohibit open burning and specify what happens when dry vegetation, a failed inverter or a lightning event creates an elevated fire risk.
Design fencing that works for sheep and the solar site
Use a permanent perimeter where appropriate and temporary paddocks where rotation is needed. A portable electric net fence is a common choice for sheep, but the energizer location, grounding, voltage and installation must follow the manufacturer’s instructions and local rules. The fence must not intrude into tracker movement, electrical clearances or vehicle lanes.
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Fence installation checklist
- Route the fence around array geometry without creating narrow pockets where sheep can become trapped.
- Provide gates wide enough for sheep handling and maintenance vehicles, and ensure gates cannot swing into panels or equipment.
- Use visible markers at corners, crossings and changes in elevation.
- Keep energizers and batteries protected from weather, vehicle impact and unauthorized access.
- Ground electric fencing as specified by the equipment maker; poor grounding can produce unreliable containment.
- Inspect for broken strands, sagging netting, shorting vegetation, storm damage and animal entanglement.
- Maintain an escape route and a designated capture area that does not require entering an electrical exclusion zone.
Inspect fences at a frequency suited to flock size, weather and site risk. After wind, lightning, flooding, heavy rain or maintenance traffic, perform an additional inspection before relying on the fence.
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Water placement and capacity
Provide clean water where sheep can reach it without entering an electrical exclusion zone. Size storage and delivery for the flock and expected weather, then establish who refills, cleans and checks it. A reliable supply is more important than a convenient location: a trough that is close but inaccessible during tracker movement or a locked gate is not a usable water source.
Use protected hoses, tanks and fittings that will not create trip hazards or be damaged by vehicles. Keep water points on firm ground where possible, and inspect for leaks, algae, contamination, freezing or heat-related deterioration.
Evaluate forage before setting numbers
Inspect forage under, between and around the rows before stocking. Measure what is actually available, account for shade and bare ground, and identify toxic plants. Move the flock or rotate paddocks when forage is depleted; shade does not equal adequate nutrition.
Solar panels can create cooler daytime and warmer nighttime microclimates, but the effect varies with array design and local conditions. UW Extension describes solar grazing as an emerging practice with limited long-term research and no consensus on every best practice. Set stocking density, forage mix, rotation timing and any supplemental feed locally with an agronomist and veterinarian rather than applying a generic rate.
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Plan shade and shelter separately from panels
Panels may alter sunlight and temperature but are not a substitute for a deliberate shelter plan. Identify shade and severe-weather shelter that do not interfere with trackers, electrical equipment or maintenance access. Decide how sheep will be moved if heat, storms, flooding or winter conditions make a paddock unsafe.
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Build a veterinarian-led flock-health plan
Before turnout, inspect each animal and record identification, body condition, lameness status, parasite findings, vaccination history and any condition that could interact with the site. Quarantine or treat animals according to veterinary advice. The American Solar Grazing Association (ASGA) describes its flock-health guide as being developed with veterinarians, extension specialists and practicing solar graziers for managed sheep grazing on solar sites.
Health topics to cover
- Arrival and quarantine procedures for new or returning sheep.
- Vaccination, parasite monitoring and treatment thresholds set by the veterinarian.
- Lameness checks, hoof care and a process for removing injured animals quickly.
- Nutrition monitoring as forage changes through the season.
- Heat-stress recognition, cooling and emergency treatment.
- Medication storage, withdrawal records and disposal.
- Mortality investigation and carcass handling.
- Identification of toxic plants, contaminated water or unusual behavior.
Keep the veterinarian’s contact details at the site and in the operator’s emergency file. The health plan should state who is authorized to call, who transports an animal, and who pays for routine and emergency care.
Daily and seasonal management
Set inspection frequency according to flock size, weather, terrain and equipment risk. A practical visit checks both animals and infrastructure rather than treating them as separate jobs.
- Count or otherwise account for the flock and look for animals isolated, trapped or behaving abnormally.
- Check fence voltage or integrity, gates, corners, drains and areas where sheep could become entangled.
- Verify water cleanliness, flow, tank condition and access.
- Assess forage, body condition, shade and signs of heat stress.
- Look for lameness, injuries, toxic plants, wire chewing and animals in tight spaces.
- Confirm that maintenance vehicles, contractors and chemical applications match the agreed schedule.
Rotate paddocks or move the flock when forage is depleted or ground damage is developing. Record inspections, repairs, treatments, escapes, mortalities, weather events and communications. A shared log gives the operator and grazier the same account of what happened and when.
Predators, dogs and emergency response
Agree on predator policy before sheep arrive. The contract should identify whether guardian dogs are allowed, how they are housed and managed, and who responds to a predator incident. ASGA’s health-planning material emphasizes predators, guarding dogs, communication and veterinary partnership as connected management topics.
Write an emergency procedure that covers:
- an escaped flock, including the capture location and notification order;
- a sheep injured near equipment or in a drain;
- fence failure after a storm;
- fire, smoke, lightning, flooding or extreme heat;
- suspected electrical contact;
- an unplanned maintenance visit;
- loss of water or a contaminated water source.
Include the solar operator’s 24-hour contact, the grazier’s contact, the veterinarian, emergency services and the person authorized to isolate equipment. Define site-entry rules for anyone responding. Never send a person into an electrical area merely to retrieve a sheep; isolate the equipment through the operator’s established procedure first.
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Coordinate grazing with maintenance and chemicals
Maintenance crews need advance notice of where sheep are located, which gates are locked and how to reach equipment without driving through a flock. The grazier needs notice of mowing, herbicide, electrical work, construction, tracker changes and inspections. Establish a minimum notification method—such as a call plus a written message—and record the date, area and expected duration.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallDo not return sheep until the operator and veterinarian, where relevant, agree that a treated or disturbed area is safe. The agreement should specify product information, exclusion periods, signage and who verifies re-entry. Keep all contractors aware that sheep may be present, and require them to close every gate they use.
Write the solar-grazing contract before turnout
A handshake does not define responsibility when an animal, panel or cable is damaged. EnergyCo NSW’s Agrivoltaics Handbook, published 17 December 2025, recommends involving landowners and graziers during early design and using checklists before grazing contracts. The handbook is a planning resource, not NSW policy or formal assessment guidance; local electrical, animal-welfare, pesticide, fire, insurance and planning rules still apply.
Put the following terms in plain language and attach the site map, emergency contacts and inspection form.
| Contract area | Questions the agreement must answer |
|---|---|
| Grazing area | Which parcels and panel rows are included? Which electrical, moving-equipment, drainage and service areas are permanently excluded? |
| Infrastructure | Who owns, installs, inspects, repairs and replaces fences, gates, troughs, pipes, shade and shelter? |
| Stocking and rotation | What flock size or density is allowed? Who decides when sheep move, and how are forage shortages handled? |
| Feed and water | Who supplies forage, supplemental feed, minerals, tanks and refills? What quality and inspection standard applies? |
| Animal care | Who provides routine veterinary care, medicines, transport, mortality handling and records? |
| Predators and dogs | Are guardian dogs permitted? Who manages them and pays for losses or response work? |
| Access and emergencies | Who may enter, which gates are used, how is electrical isolation requested, and who has authority during a fire or escape? |
| Maintenance and chemicals | How much notice is required for mowing, herbicide, construction or electrical work? Who approves re-entry? |
| Insurance and liability | What policies, indemnities, damage definitions and incident-notification deadlines apply? |
| Payment | Is compensation based on area, time, animal numbers, vegetation service or another method? When are invoices or payments due? |
| Inspection rights | Can either party inspect records, fences, animals and equipment, and how are deficiencies corrected? |
| Termination and restoration | What notice ends grazing? Who removes temporary fencing, reseeds damaged ground and restores the site at project end? |
Attach a change-control clause. A new tracker, cable route, gate, chemical program or construction phase can alter the risk assessment; grazing should pause until the map, controls and responsibilities are updated.
Compare potential solar-grazing sites systematically
If you are choosing between arrays, evaluate the whole operating system rather than panel capacity alone. Use the same questions at each site.
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| Comparison axis | What to inspect | Why it matters |
|---|---|---|
| Clearance and tracker design | Lowest panel edge, tracker travel, maintenance clearance and fixed versus moving structures | Determines whether sheep can move without contacting panels or being trapped by moving equipment |
| Cables and electrical protection | Encased wires, exposed routes, equipment compounds and isolation procedures | Controls shock, entanglement and emergency-access risk |
| Fence and service geometry | Perimeter shape, paddock options, gates, corners, drains and vehicle lanes | Determines containment, rotation and safe maintenance access |
| Water reliability | Distance, storage, refill access, winterization and backup supply | Affects labor, welfare and resilience during heat or outages |
| Forage and shade pattern | Available forage, bare ground, toxic plants, shade distribution and seasonal change | Sets realistic stocking and supplementation decisions |
| Predator and veterinary access | Road access, capture areas, shelter and communications | Determines response time when an animal is ill, injured or threatened |
| Labor and transport | Travel time, handling facilities, water work and contractor coordination | Reveals the recurring work behind the grazing service |
| Insurance and liability | Required coverage, indemnities, incident rules and exclusions | Prevents an unclear loss from becoming a dispute |
| Payment terms | Rate basis, invoicing, performance conditions and late-payment rules | Shows whether compensation matches the actual labor and risk |
| Restoration obligations | Fence removal, reseeding, erosion repair and end-of-project standards | Avoids an unfunded obligation when grazing or the solar project ends |
Larger ruminants generally require more clearance than sheep, so a design that suits sheep should not automatically be treated as suitable for goats or cattle.
Troubleshoot common failures
Sheep repeatedly reach a cable or equipment area
Stop grazing in that section, contain the flock elsewhere and notify the operator. Re-map the route, improve physical exclusion and verify that the fix does not interfere with tracker movement or service access. Do not improvise by tying a fence to electrical infrastructure.
A tracker, trough or feeder conflicts with the fence
Pause use of the affected paddock. Compare the fence and equipment positions through the tracker’s full movement range, then relocate the livestock equipment or redesign the paddock with the operator’s approval.
Forage disappears faster than expected
Move or reduce the flock, assess ground and forage conditions with an agronomist, and revise the rotation or supplemental-feed plan. Do not leave sheep in a depleted paddock because the panels provide shade.
A storm damages the fence
Secure the flock away from electrical and vehicle hazards, notify the operator, repair or replace the fence, and record the event. Check water, drains, cables and tracker clearances before returning sheep.
Maintenance workers arrive unexpectedly
Use the emergency contact procedure, confirm who has authority to enter, and move or contain sheep only when the route is safe. Update the notification process after the incident so the same gap does not recur.
A practical go/no-go test
Turnout is appropriate only when every answer below is “yes” or has a named owner and deadline:
- Are panel, tracker, electrical and vehicle exclusion zones mapped and marked?
- Are reachable wires properly encased and electrical isolation procedures understood?
- Can fences contain sheep without blocking service or emergency access?
- Are water, forage, shade and shelter available for the expected conditions?
- Has a veterinarian-led flock-health plan been completed?
- Are predator, escape, severe-weather and veterinary responses written down?
- Have maintenance, herbicide and fire rules been coordinated?
- Have payment, insurance, liability, restoration and termination terms been signed?
If any answer is “no,” delay turnout or restrict the flock to a separately approved area. Safe solar grazing is a managed partnership: suitable panel clearance makes sheep possible, but disciplined design, inspection and communication make the arrangement dependable.
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