In a contract of about $ 200 million with PSE & G , Petra Solar will make units for 200,000 poles in New Jersey 's six largest cities and 300 rural and suburban communities in PSE & G 's service territory . Over the 3 1 / 2 year life of the contract , Petra will add the green jobs to its employee base of 40-plus employees , most of whom work in the company 's South Plainfield headquarters and manufacturing facility .