![BMW i3 electric car charging in 'EV Charging Only' space, Santa Clarita, CA [photo: Steve J. Myung]](http://images.hgmsites.net/tmb/bmw-i3-electric-car-charging-in-ev-charging-only-space-santa-clarita-ca-photo-steve-j-myung_100607534_t.gif)
As the demand for electric cars grows, utility companies are considering their effect on local power grids—both positive and negative. Recently, California's PG&E and BMW recently wrapped up a pilot program testing experimental vehicle-to-grid technology to see if electric cars could actually aid the grid—and they did. The program...