Jonathan Welle December 29, 2016 New Jersey Solar Panels, Solar Panels, buying solar in new jerse How much do solar panel systems cost in New Jersey? Jonathan Welle December 29, 2016 New Jersey Solar Panels, Solar Panels, buying solar in new jerse How much do solar panels cost in New Jersey? With costs falling and strong incentives at the state level, New Jersey remains one of the most robust markets in the United States.