Australia's Largest Dairy Cuts Power Costs With Solar

After losing $600 for every hour the power went out, Western Australia's largest dairy decided to take energy into its own hands.

Peninsula Downs has been milking cows for over 70 years across eight properties in the state's South West region. For decades, the farm relied on grid electricity and diesel generators to pump water and grow feed for thousands of cows.

But in 2024 alone, power outages hit the dairy 21 times. Meanwhile, electricity costs jumped 50 percent in just 12 months, making the old system impossible to maintain.

Managing director Ross Woodhouse invested $650,000 of the company's own money into a hybrid solar and battery system. The setup combines solar panels, battery storage, and a backup diesel generator that now runs just 7 hours a day instead of 24.

The solar system will provide two-thirds of the dairy's energy needs. That translates to major savings on both fuel costs and lost production from outages.

The timing couldn't be more critical for Western Australia's dairy industry. The number of dairy farmers in the state has crashed from 400 producers to fewer than 100 today, driven by rising land values, aging workers, and squeezed profit margins.

Land that once cost $1,000 per acre now sells for over $11,000, while returns on those assets remain painfully low. Young people are turning away from the demanding lifestyle and uncertain economics.

The Ripple Effect

Peninsula Downs' solar investment represents more than one farm cutting costs. Agriculture Minister Jackie Jarvis called the move a positive sign for an industry fighting to survive.

"We want to make sure that the fresh milk supply in Western Australia remains," Jarvis said. She noted that farms using lots of diesel or grid power are perfect candidates for going off-grid.

Woodhouse sees renewable energy and automation as essential for the next generation. His goal is for Peninsula Downs to eventually run entirely on renewable power while reducing dependence on manual labor.

The dairy industry needs solutions that work not just for today but for centuries ahead. "It should be here in 400 years' time, exactly the same," Woodhouse said.

When faced with unreliable power and an uncertain future, one farm chose to build its own.