Enlarge / GM used a Silverado EV to power a 10,000-square-foot house as a demo of its Home Energy system. (credit: General Motors) LOS ANGELES—Let's face it: The American power grid is a hot mess. The system is outdated and overstressed by amp-sucking appliances, air conditioning units, and extreme weather. Depending on where you live, it's likely only a matter of time before your home will experience a blackout.