New Jersey has become a surprisingly legitimate contender for the nickname "sunshine state," with the highest number of solar energy installations of any state save California. Energy officials this week celebrated the latest New Jersey solar milestone — the state now has more than 4,000 solar installations. The installations, which range from a few panels on private homes to more than 7,700 panels on a field at Rutgers University, combine to produce 90 megawatts, which can generate power to 12,000 households. Seven years ago the state had only six solar installations. "We have had really good policies and have made...