Plug-in solar is coming. Here’s how much you could save on electric bills

Plug-in solar is on the way, and it could cut your electric bills. A growing number of states are poised to pass bills supporting the panels, which are designed for DIY installation: Hang one out a window or set it on a deck, plug it into a regular outlet, and power starts flowing back into your home. A new calculator helps you estimate how much you can save on power bills, using your zip code to estimate how much sunshine you get and how much you’re paying for electricity now. The tech co...