Solar power accounted for 100% of the power added to the grid in March and has accounted for as much as 50% of the additions in the first quarter. Giant projects from solar heavies First Solar (FSLR -1.43%) and SunPower (SPWR) are driving the utility industry, and SolarCity (SCTY.DL) is building residential solar at a fevered pace. Erin Miller sat down with Motley Fool contributor Travis Hoium to see what this trend means for our energy future.