FAQs

What size generator is needed to power a house?​

Do the generators have to be maintained?​

Homeowners can often power most household appliances using between 3000 and 6500 watts. If your home has a smaller furnace and city water, you can generally expect that 3000-5000 watts will cover your needs. If you have a larger furnace and/or a well pump, you will likely need a 5000 to 6500 watt generator.

All generators require periodic maintenance, such as oil and filter changes to ensure maximum performance for years of reliable service. Scheduled maintenance kits are available and many Generac authorized dealers offer annual maintenance contracts for a worry-free ownership experience. We recommend you have your unit serviced every 6 months by an authorized independent service dealer. Refer to the owner’s manual for routine maintenance procedures and schedules. 

How long can you run a whole house generator?​

What is the difference between an automatic air-cooled generator and an automatic liquid-cooled generator?

As long as there is a fuel supply of natural gas or propane, a well-maintained backup generator will keep running. If the Generac generator is running on propane, with a 500-gallon tank, it should run 24 hours a day for over a week.

The engines! Air-cooled generators come with engines that use fans to force air across the engine for cooling, while liquid-cooled generators use enclosed radiator systems for cooling, similar to an automobile. Generally, liquid-cooled engines are used on larger kW generators due to the larger engines required for the higher power output.

What is an automatic backup generator?

Why should I buy an automatic backup generator instead of a portable generator?

An automatic backup generator is a back up electrical system that operates whether you are home or away. Within seconds of an outage, it automatically supplies power directly to your home’s electrical circuit breaker box. After utility power returns, the generator shuts itself off and waits for the next outage. It operates on natural gas or liquid propane gas and sits outside just like a central air conditioning unit.

During a utility power outage, an automatic backup generator provides numerous advantages over a portable generator:

  • The American Red Cross recommends permanently installed backup generators as a safer way to provide backup power to a home than a portable generator.
  • With an automatic backup generator properly installed outside, your home is protected from deadly carbon monoxide poisoning that is a much greater risk with portable generators.
  • Running on the home’s natural gas or LP fuel supply, it is less expensive to run than gasoline and sources such as natural gas do not need to be refilled.
  • They start automatically within seconds of a power outage, and eliminate the need to haul a portable generator outside or run extension cords throughout your home.
  • They provide protection 24/7, whether you’re home or away, and they turn themselves off when utility power returns, so there is no need to monitor the unit during an outage.
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