JEAN GUERRERO:

A hundred percent of the electricity is sold to San Diego Gas & Electric through a cross-border transmission line. The project is part of a statewide scramble for renewable energy. California must get half of its electricity from renewables by 2030.

To help achieve that goal, Energia Sierra Juarez plans to expand its production capacity by close to 700 percent, building hundreds of additional turbines on the mountain range. But the entire project is being challenged in court.

Mark Ostrander lives in Jacumba Hot Springs, footsteps from the border fence. He lives completely off the grid, with solar panels and a vertical axis wind turbine he installed.