These plug-in solar panels can slash your energy bills, but they're legal in just a few US states

These plug-in solar panels can slash your energy bills, but they're legal in just a few US states

Plug-in solar panels are winning fans as a low-cost way to trim power bills without installing a full rooftop array. But in the United States, this simple energy-saving setup is still not fully legal in many states. That means that technology that could save households roughly $13 to $35 a month is spreading much more slowly in the nation than it has abroad. According to ZDNET, plug-in solar, also known as balcony solar or backyard solar, uses s…