Let’s face it—power outages are going to happen. They can last for hours, days or even weeks, and they can cost you if you’re not prepared. Hurricanes, tornadoes and violent storms can disrupt our power supply system. Weather isn’t the only thing that can plunge us into darkness though. Animals, human error and utility failures also can trigger a blackout. Without an expensive transfer switch, you can’t safely plug a portable generator into your home’s electrical panel.