The day-to-day environment of modern pig units rely on systems that keep housing conditions stable: ventilation, temperature control, lighting, water supply and monitoring equipment.

Pig welfare depends on consistency and the Agriculture & Horticulture Development Board (AHDB) notes that building design and controlled environments have a significant impact. Not just on pig welfare, but their health and performance, and identifies ventilation as a key factor in both welfare and productivity.

Although solar energy won’t improve animal welfare on its own, it supports the infrastructure pig farms rely on to maintain stable, well-managed conditions all the while helping reduce energy-cost pressure.

Why Energy Matters to Pig Welfare

Defra’s code of practice frames welfare around providing pigs with a suitable environment and protecting them from suffering and disease. A suitable environment for pig housing is highly dependent on powered systems, especially during the winter months, so that means energy reliability matters.

Ventilation systems need to keep fresh air moving and stale air leaving the building. Temperatures need to stay within an appropriate range for the age and stage of the pigs. Lighting, water systems, alarms and automated equipment all contribute to how stable and manageable the housing is. When those systems are under strain, animal comfort can be affected quickly.

How Solar Can Support Consistent On-Farm Operations

In a nutshell, solar energy supports the operational systems that good animal welfare depends on. By generating some electricity on-site, solar can help farms reduce dependence on purchased power during the day and support the ongoing running costs of systems such as sensors, alarms, monitors and controls.

Some solar PV actually works alongside monitoring technology that tracks factors such as temperature and humidity in barns or sheds. This gives farmers better visibility of housing conditions and can help them spot issues with heating or ventilation earlier, supporting quicker actions and more consistent animal welfare.

Of course, it also helps power the systems that keep pig housing warm, dry and well-managed without relying heavily on costly fossil fuel-based heating. In turn, this can support more stable living conditions and help reduce the risk of health problems linked to damp or cold housing environments.

Welfare Case for Greater Energy Resilience

Animal welfare can suffer when housing conditions become inconsistent and this is where energy resilience matters. If energy costs are volatile, farms may feel pressure when running electrically intensive systems. Plus, if infrastructure investment is delayed because of cost pressure, that can also affect the quality of environment over time.

While solar may not be the complete answer to these pressures, it can help improve cost predictability and support investment in the systems that keep housing conditions stable. A farm that is better able to manage its energy costs is in a stronger position to keep welfare-supporting systems running well.

Operational & Commercial Benefits of Solar PV

The value of solar on pig farms extends to the wider business, with potential benefits including:

Reducing electricity costs over time
Making use of roof space on farm buildings
Improving resilience against energy-price volatility
Supporting long-term planning for housing and infrastructure
Strengthening the commercial case for modern, well-managed pig accommodation

Welfare and commercial performance are closely linked; supporting good welfare is not separate from running an efficient business.

Considerations Before Investing in Solar on Pig Farms

Before investing, farms should think about:

How much electricity they use, and when
Whether there is suitable roof space or land
How solar would fit with existing buildings and infrastructure
Whether the system supports the farm’s long-term strategy
How welfare-critical systems are currently managed

AHDB’s guidance on pig buildings encourages producers to think about futureproofing when making housing decisions. Solar works best when it’s considered as part of that broader operational strategy.

Good animal welfare will always depend on appropriate housing design and well-managed systems, but solar can play a useful supporting role. It helps power the systems that consistent pig welfare relies upon. Its value is practical as much as environmental and can help farms create more stable conditions while also improving operational and energy resilience, and long-term efficiency.

Published

May 15, 2026