Solar grazing refers to placing grazing animals in the same field as a solar panel installation. Sheep are commonly used, rather than cows or goats, as they are small enough to safely move underneath the panels and graze consistently which aids vegetation management.

But what are the benefits of solar grazing for farmers, what considerations need to be made, and how do farmers know if it will work for their farmland? Let’s find out.

What Are The Benefits of Solar Grazing?

Combining sheep grazing and solar energy generation provides farmers and landowners with a wide range of new opportunities.

Boost Grazing Behaviour

A 2023 study on the effect of solar panels and rotation frequency on the grazing behaviour of sheep saw those with access to solar panels graze more than those on native farmland. By protecting sheep from climatic conditions, such as keeping them warmer and drier, the sheep spent more time grazing. Find out more here.

Better Vegetation Management

One factor that may hold farmers back from investing in solar PV is navigating ground maintenance. The poles and panels can make it difficult to get a lawnmower around to keep the grass short enough so it doesn’t interfere with the equipment.

By placing sheep within the solar farm, they can efficiently keep the grass and weeds under control. With less vegetation shading the panels, there will be more access to sunlight, so the system will operate at maximum efficiency.

Reduce Carbon Emissions

Following on from the point above, without the need for powered mowing equipment, carbon emissions will immediately reduce. Costs for running and hiring this equipment will also be reduced as sheep can be relied upon in all weather conditions to keep on top of vegetation management.

Improve Soil Health & Eliminate Herbicide Use

Installing solar panels on grassland is ideal for drainage and environmental protection. With sheep effectively managing weeds, there is no longer a need for chemical weedkillers and herbicides, resulting in less toxins in the soil.

The grass also acts as a natural buffer and filter, improving water quality. By slowing rainwater runoff, alongside the solar panels, it reduces soil erosion, lowers flood risk, and limits the movement of contaminants into nearby streams and drainage systems.

The runoff also provides a source of irrigation so can increase vegetation, providing more food for the sheep. Finally, sheep help fertilise the land which ultimately improves soil health and enhances biodiversity.

Enhance Biodiversity

Using sheep for solar grazing can help maintain balance to ecosystems, particularly pollinators, birds and small mammals. Sheep dung is a natural fertiliser because it may contain undigested plant seeds.

As the animal moves around the farmland, it is trampled into the ground which thereby encourages plant species to grow. This biodiverse ecosystem is continuously maintained by the grazing sheep, benefitting both the environment and wildlife.

Increase Income Stream

Many recent articles have claimed that solar grazing offers an economic triple-win.

  1. Land Leasing: Farm or landowners can earn income by renting their land to solar operators for panel installation.
  2. Grazing Contracts: Farmers can receive payment for allowing livestock to graze under and around the panels.
  3. Agricultural Products: Farmers can continue to sell wool, dairy or meat from the grazing sheep.

By combining these revenue streams, farmers can benefit from a significant increase in income, thereby improving financial viability of both solar farms and farms as a whole.

Considerations for Solar Grazing

It’s important to note that not every farm will be suitable for solar grazing; here are some considerations to make when looking into agricultural solar panel installations.

Solar Panel Design & Planning

The layout of the solar panels must accommodate livestock movement while maintaining system efficiency. There must be adequate clearance for the sheep to move freely underneath and in between panels without risk of interference or injury.

The orientation must also reduce shading alongside ensuring enough sunlight reaches the grass. Other planning considerations include regulatory compliance with land use planning, energy generation permits and animal welfare legislation.

Livestock & Solar Panel Safety

For a successful solar grazing operation, it’s vital that both the animals and solar panels are protected. Wiring and inverters must be installed discreetly and adhere to regulatory and industry safety standards to minimise any risk to animals.

Routine inspections and maintenance must be carried out without compromising either the system or animal safety. Maintenance schedules should be coordinated with grazing rotations to minimise disruption and risk.

Grazing Management Practices

Grazing strategies should consider the species, numbers and behaviours of the animals. Sheep are most commonly used, but other species may also be considered depending on vegetation and site conditions.

Controlled numbers and rotational grazing under PV arrays will help prevent overgrazing and reduce vegetation stress. Remember to regularly observe the health and behaviour of the animals so any signs of distress or risk are addressed promptly.

Common Solar Grazing Challenges

While solar grazing offers a “dual use” solution that benefits both renewable energy production and agricultural output, there are some challenges to be aware of.

Seasonal & Operational Variability

Agricultural operations are subject to seasonal changes in grazing availability which may affect livestock and vegetation management.

Adjusting grazing schedules based on seasonal growth patterns and weather forecasts will help with this. Extra preparation using contingency plans for extreme weather events ensures both animals and panels are protected. Plus, renewable energy monitoring will track how seasonal shading or vegetation changes impact panel performance.

Managing Infrastructure Risks

If not accustomed to solar panels, sheep and other livestock can be extremely curious and clumsy which may cause accidental damage to panels or wiring. As well as this, routine maintenance can also disrupt grazing areas.

Start with acclimatisation periods for the animals so they can become familiar with their new surroundings and risky behaviour is minimised. Make sure the number of livestock is appropriate for the size of the solar farm and, where necessary, install fencing as barriers around critical equipment.

Planned maintenance windows can help organise temporary removal or rotation of livestock and clearly marked pathways makes access even easier for equipment servicing.

Agricultural Solar Panel Installations from Noble Green Energy

At Noble Green Energy, we help farmers plan and install solar panel systems for their new ventures. With a new opportunity, like solar grazing, farmers can expand their operations and reap both the economic and environmental benefits.

Want to find out if agrivoltaics farming is right for you? Get in touch with us today.

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