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Silicon Ranch has brought 15 cattle onto a 3.25-megawatt solar project in Christiana, Tennessee, using elevated panels and adjusted tracking controls to accommodate grazing. The developer says the design added 3% to project costs and that electricity was sold to Middle Tennessee Electric below the wholesale rates it paid the Tennessee Valley Authority. The approach is an early commercial test; its broader costs and performance remain uncertain.
Silicon Ranch has introduced a 15-cow herd to its 3.25-megawatt solar project in Christiana, Tennessee, testing a design intended to let cattle graze beneath working panels. The developer describes it as the first commercially viable utility-scale U.S. project to combine solar power and cattle farming, a claim that could not be independently confirmed from the source material.
The cattle rotate through 15 paddocks bounded by electric wire, grazing Bermuda grass beneath panels mounted higher than standard. The project is about 45 minutes southeast of Silicon Ranch’s Nashville headquarters. The company brought the herd to the site six months before the original report and said the animals had adapted well.
Silicon Ranch’s agrivoltaics team developed a system called CattleTracker, using moderately elevated steel supports rather than much taller structures. In paddocks where cattle are grazing, the solar trackers enter a setting that limits panel tilt to 20 or 30 degrees, rather than the maximum 60 degrees, keeping lower panel edges above the animals.
Silicon Ranch principal team leader Loran Shallenberger said the equipment changes raised costs by 3% over a standard design. He also said the company sold the project’s power to Middle Tennessee Electric for less than the wholesale rates the utility was paying the Tennessee Valley Authority. Those cost and price details are company-reported; the source does not provide independent project accounts or a longer-term operating record.
The project tests whether solar developers can produce electricity while keeping land in agricultural use, rather than converting it solely to a power site. That may matter in areas where open land is limited or residents oppose solar projects changing rural landscapes. Combining uses could offer farmers another source of revenue while adding electricity generation, though the report does not specify how grazing revenue is divided or quantify the project’s effects on the surrounding community.
For developers, the central question is whether cattle-friendly equipment can be repeated without undermining the economics of solar. Silicon Ranch’s reported 3% cost premium is one early data point, not proof that the model will be affordable across different sites or power markets. Solar developers typically seek to maximize output per acre and control costs, so the design’s performance and maintenance requirements will shape its potential.
The project does not address greenhouse-gas emissions from cattle, including methane released through digestion. It is a land-use approach that can add solar generation alongside existing cattle production, not a solution to livestock emissions. The source does not quantify the project’s emissions or compare them with other land-use options.
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Why Cattle Are Harder Than Sheep
Solar operators already use sheep at some sites to manage vegetation, but cattle pose different design challenges. Their size and behavior can put panels, wiring and other equipment at risk. Terry Jennings, a renewable-energy team leader at the Electric Power Research Institute, said cattle-suitable facilities generally require a more specific design, which can raise project costs.
Silicon Ranch developed its approach after studying the issue with support from a Department of Energy grant, according to the report. Rather than lift the panels on very tall supports, the company adjusted their mounting and tracker controls. The herd is made up of Murray Grey cattle, an Australian breed described in the report as having calm dispositions. The source also notes an earlier 2-megawatt AES project in Massachusetts that sought to test solar and cattle grazing in the community-solar market.
More broadly, agrivoltaics refers to using land for both solar generation and agriculture. Research has found that some grasses and crops can grow well in the shade of panels, but the report says cattle grazing has received less attention. The Christiana installation is therefore an early test of a particular design, rather than evidence that all solar sites can support livestock.
““I thought it would work — I just didn’t think it would work this well.””
— Loran Shallenberger, who leads Silicon Ranch’s Regenerative Energy and Agrivoltaics division
The Model’s Costs and Performance
The Christiana site offers an early operating example, but the source does not provide long-term data on electricity output, equipment damage, repair needs, cattle health or grazing productivity. It also does not establish whether the reported 3% cost premium would apply to projects with different designs, climates, herd sizes or land conditions.
Jennings said research into how cattle interact with solar panels is still relatively new and that uncertainty remains. It is also unclear whether Silicon Ranch plans to expand this design, how many sites could use it, or whether other developers would adopt the approach. The company’s description of the project as the first commercially viable utility-scale U.S. example is attributed to Silicon Ranch in the source, not independently verified there.
Tracking Results Beyond Christiana
The next test is whether the project can continue generating power and supporting cattle grazing without added costs or operational problems that outweigh the reported benefits. Longer-term reporting on electricity production, maintenance, animal welfare and farm economics would help show whether the design works beyond its initial months.
The source does not identify a scheduled review, expansion decision or next milestone. For now, the Christiana installation remains a single commercial-scale demonstration. Any wider rollout will depend on further operating evidence and on whether the added design requirements fit the economics of future solar projects.
Key Questions
Where is the solar-and-cattle project?
It is in Christiana, Tennessee, about 45 minutes southeast of Silicon Ranch’s Nashville headquarters.
How many cattle are grazing at the site?
The project has a 15-member herd that rotates among 15 paddocks, according to the original report.
How are the panels adjusted for cattle?
Silicon Ranch’s CattleTracker design uses moderately elevated panels. In paddocks being grazed, the trackers limit panel tilt to 20 or 30 degrees so the lower panel edges remain above the animals.
Does the project eliminate cattle emissions?
No. The approach combines solar generation with cattle grazing but does not address greenhouse-gas emissions from livestock. The source does not provide an emissions estimate for the project.
Has cattle-friendly solar been proven commercially at scale?
The report describes the Christiana site as an early utility-scale commercial project and attributes the “first commercially viable” description to Silicon Ranch. Long-term operating results and the approach’s wider commercial viability remain unclear.
Source: canarymedia.com
