Solar Panels That Plug into Your Wall Are About to Be Everywhere

Plug-in solar panels, which can be easily installed on balconies or lawns without expensive roofing work, are rapidly spreading across the U.S. as more states legalize the technology to reduce regulatory barriers. California is the latest state to pass legislation supporting balcony solar, joining ten others, with systems typically generating 10-30 percent of a home's electricity needs while helping consumers save money and reduce fossil fuel dependence.