Except for one minor problem. Energy is not free and unlimited for us with our current technologies. If we had limitless power, sure, absolutely. Time of scarcity is over.
Solar technology is advancing very fast, and pays itself off eventually making it economical (in the long run). There are funds that will loan money for the panels, and ask for a portion of the electricity savings essentially eliminating risk and ensuring everyone a bit of savings/gains.
As other limited energy sources shrink in supply people will switch over to solar, the faster the limited sources dry up the faster the switch, all the while the solar panels are becoming more economical with technological advancement.