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Back-up Emergency Power Generator

How to Choose the Back-up Standby Generator Size To Meet Your Needs

Generac Back-up Emergency Generators made in America

Each circuit is directly connected to a matched circuit on the home's main circuit breaker panel, providing electricity to that specific appliance or area of the home.
Get more coverage with less generator, up to whole house coverage, by pairing a smaller generator with a load shedding switch. This creates 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.

Cover every circuit in your home or business by pairing a liquid cooled back-up generator and the proper transfer switch to provide full coverage. No circuit is left uncovered, so every appliance is available every minute.








Frequently Asked Questions


What is a back-up generator and what does a back-up generator do?

An automatic standby 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. Industrial units are available that run on diesel fuel as well.

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

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

The American Red Cross recommends permanently installed standby generators as a safer way to provide backup power to a home than a portable generator.
With an automatic standby 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 does 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.

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

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.

Can an automatic standby generator replace utility service?

No...the generator fuel costs would be much more expensive than buying power from the utility company since their cost to produce electricity is divided among thousands of customers.

How do I correctly size a generator for my home?

The most logical way to determine your needs is to envision your home without power. Some outages may be short in duration, while others could last for days or weeks. What would your you, your family or business miss during an outage? A myriad of options are available to suit every need, from essential circuit back-up, managed circuit back-up, to whole house or whole building generator coverage. Which size you select is based on your individual back-up power needs and budget. No mater what size unit your looking for, there is generator designed to meed your back-up power needs.

The most effective and accurate way to size a back-up generator is by running a load calculation as outlined by the NEC Electrical Code. This can be done by a licensed, knowledgeable electrician that is familiar with back-up generator installations. Sizing calculators are available to help you get an idea of the size range that will need to meet your needs. These calculators are intended for estimating purposes only. Actual power requirements of high demand appliances vary widely by brand, model and capacity. Always have an qualified electrician analyze your specific requirements before making a purchase decision.

Location, location, location. Location is an factor in every installation. Placement is often limited and the proposed site must be cleared by contacting the local municipality to verify property set-backs. If the property is overseen by an HOA, approval will need, this is the responsibility of the home owner, and it is recommended to receive this autorrization in writing.

It is recommended, that when sizing your back-up generator, some room is calculated in for expansion. This is vital for commercial applications but is still wise for residential installations, as well. Temperature is a another variable, and with our higher ambient temperatures, we need to pay extra attention to this factor during the sizing process. Maximum power output decreases about 1 percent for each 10° F above 60°F.