1. Tracking the Sun IX: the Installed Price of Residential and Non-residential Photovoltaic Systems in the United States;Barbose,2016
2. 2016 Wind Technologies Market Report;Wiser,2017
3. Lazard's Levelized Cost of Energy Analysis - Version 11.0,2017
4. North Carolina Clean Energy Technology Center, and North Carolina state University, Database of State Incentives for Renewables and Efficiency,2017
5. Business Energy Investment Tax Credit (ITC),2017