At Vistra’s Brightside Solar Facility in South Texas, lawn maintenance looks a little different. Instead of diesel-powered mowers, a flock of sheep and two sheepdogs handle the job, keeping 430 acres of solar panels clear and operating efficiently. 

Managing vegetation at utility-scale solar facilities comes with unique challenges. Traditional mowing equipment can struggle to navigate tight spaces and large areas, often requiring labor-intensive, diesel-powered machinery. 

At facilities like Brightside, sheep offer a practical alternative. They move easily between rows, graze without damaging equipment, and eliminate the need for heavy machinery. 

“At some of our other solar sites, we’ve run into real issues using traditional mowers. They can’t get under the panels; they kick up rocks, and they’ve even caused damage,” said Brad Masek, Vistra’s renewable operations director. “Putting sheep to work just makes sense. They’re nimble, easy on the land, and they get the job done efficiently.” 

To bring the idea to life, Vistra partnered with a local rancher whose family has raised sheep for generations, selecting animals well-suited to the South Texas environment. 

“Sheep are perfect for the job,” said Vistra Renewables Manager, Kristina Blackwell. “They keep the grass low without causing damage. Cows are too curious, and goats will jump on the panels.” 

Sheepdogs help manage the flock and protect them from predators, ensuring that both the animals and equipment remain safe. 

The results have been clear: reduced equipment risk, lower labor demands, and a smaller environmental footprint by eliminating diesel-powered mowing. The approach also helps preserve the land for continued agricultural use. 

With strong results at Brightside, Vistra has expanded this approach to other solar sites, putting practical, proven solutions to work across its fleet.