Solar Renewable Energy Certificates (SRECs) or Solar Renewable Energy Credits

http://apps1.eere.energy.gov/states/maps/renewable_portfolio_states.cfm#map 

$$ SRECs are tradable, non-tangible energy commodities in the United States that represent proof that 1 Megawatt-hour  (MWh) was generated from your system. 

 

$$ They are worth about $250-650 + depending on what state you are in. 

1 SREC = 1,000 KWh of solar electricity = 1 MWh of solar electricity produced

 

10 KWp solar capacity = approximately 12 SRECs per year.