Consumer Reports explains how a transfer switch or interlock device works, so your portable generator is ready for the next storm.

Jump to: Wattage, Volts, and Amps Evaluate Your Power Needs Safety First How to Connect a Generator to Your House Using a Transfer Switch Using A Breaker Interlock Make a Plan And Test Often FAQ ...

If your house already has a transfer switch and you’ve got a smaller generator that’s compatible, you can use that, though you may have to limit which appliances you power with it.