SREC stands for Solar Renewable Energy Certificate. SREC-II’s are part of NJ’s Successor Solar Incentive (SuSI) Program and are a type of clean energy credit generated based of the electricity production of your solar system for a 15-year period. For every 1,000 kWh of electricity produced, an SREC-II credit is issued. Residential SREC-II’s sell for a fixed value of $85. Selling your SREC-II’s are key to realizing a relatively quick ROI for your solar system.