Generating a little solar power is now easier than ever—in fact, it’s as easy as installing a window shutter. The PV Solar Shutter features solar cells set in the louvers, which collect power from the sun and use a grid-tie inverter that channels it directly into the home’s electrical system. Cost: $400 for a 3-foot-by-2-foot shutter.Plug ‘N Save Energy Products. 888-623-2221.