SAN DIEGO, June 8, 2011 /PRNewswire/ -- Envision Solar International, Inc., (OTCBB: EVSI), a leading sustainable infrastructure designer and developer, today announced that the company has broken ground on electric-vehicle (EV) charging enabled Solar Tree® structures with integrated EnvisionTrak(TM) and CleanCharge(TM) systems at Axion Power International's (OTCBB: AXPW) facility in Western Pennsylvania.