September 2014 - Yolo County, California, now produces 152 percent more energy from solar panels than it uses. In 2009, Yolo County partnered with SunPower to install a 1-megawatt (MW) solar power system at the Yolo County Justice Campus. In 2013, the county installed an additional three arrays totaling 5.8 MW of power as part of its County Wide Solar Project. The County owns the system and associated renewable energy certificates.

In July 2014, the EPA recognized Yolo County on its list of green power partners that generate and consume the largest amount of green power on-site, alongside companies such as Walmart and Apple.

Press Release - How a small county in California went grid positive