To determine what size Generac generator you need, you can use the Home Standby Sizing Calculator provided on the Generac website. This calculator will provide you with three possible generators to fit your needs, along with estimated installation costs and financing options. You can select "whole house" to get a backup generator recommendation based on your homes size and corresponding outlets and lighting requirements, assuming natural gas appliances in the baseline calculation. If your home is all-electric and includes electric appliances like an electric range, electric clothes dryer, electric water heater, etc., you can add these items below to accurately reflect your homes specific backup power needs.

Generac also offers prepackaged Guardian Series generator systems that provide essential circuit coverage. The generator is paired with a transfer switch containing a predetermined number of circuits based on the generators kW power rating. Each circuit is directly connected to a matched circuit on the homes main circuit breaker panel, providing electricity to that specific appliance or area of the home.

If you need more coverage with less generator, you can pair a smaller generator with one of Generacs load shedding options to create a managed power solution where non-essential circuits are shed when the generator approaches maximum capacity. They are cycled back on when essential circuits no longer require power, so all circuits receive power at different times.

If you need to determine what size portable generator you need, Generac also provides a Portable Generator Sizing Calculator on their website.