Nestle Purina PetCare and Perdue Incorporated have unveiled major solar arrays in Arizona and Maryland.

Nestle Purina’s 1,900 panel, 427-kilowatt solar photovoltaic system covers 70,000 square feet of the roof of its Flagstaff, Ariz., pet food manufacturing facility.

The array was developed by REC Solar and will produce nearly 12 million kilowatt hours of solar electricity over its lifetime, Nestle Purina says.

Food and agriculture business Perdue has cut the ribbon on a 5,040 panel solar plant on land in Salisbury, Md., that lies adjacent to its corporate headquarters.

The array’s panels are owned by Washington Gas Energy Services and were installed by Standard Solar Inc. Perdue will purchase electricity generated by the solar panels at guaranteed prices in a 15-year contract.

The Salisbury facility is the second and final part of a wider solar plan carried out by Purdue.

In August, the company announced the completion of a 6,720 panel solar array in Bridgeville, Del. Combined, the two systems will generate 3,700-megawatt hours of electricity each year.

In other renewable energy news, SC Johnson is seeking to build two to three wind turbines at its Waxdale manufacturing facility in Mount Pleasant, Wis., as it aims to generate 100 percent of the facility’s power on site.

The company expects the wind turbines to produce approximately 8 to 10 million kwh of electrical energy per year. This is approximately 15 percent of the energy used at Waxdale.

The remaining 85 percent of the site’s power is supplied by two cogeneration units that were installed over the last decade.