A large portable generator or a permanently installed standby generator can keep your entire home powered and operational for several days, or at least keep a few critical appliances such as a refrigerator running until the power comes back on. Best Inverter Generator for Midsize Homes Pulsar 7,250-Watt Dual-Fuel Inverter Generator Best Inverter Generator for Midsize Homes Pulsar 7,250-Watt Dual-Fuel Inverter Generator Now 8% Off $1,300 $1,199 Amazon Pros Inverter Inverter generators look and operate the same as other portable generators, but have an added component–a power inverter– that converts the alternating current (AC) power generated by its fuel source to DC (Direct Current), then inverts it back to AC before putting it out.