I. Introduction
Environmental concerns and less reliance on fossil fuel power generation have caused a transition from centralized energy infrastructures to integration of distributed energy resources (DER) especially solar distributed generation. With recent advances in technology, solar PV is currently the fastest growing renewable energy source in the U.S. [1] becoming more accessible, affordable, and prevalent in the country than ever before. More than one million solar installations are connected to US electric grid today, totaling nearly 30 gigawatts - a 26-fold increase since 2008. The President's Climate Action Plan set the goal of doubling U.S. renewable energy deployment between 2012 and 2020 and installing 100 megawatts of solar on federally-assisted housing [2].