Industrial + Commercial + Residential Services

Standby Generators – Residential

Nemmer Electric

254 756-2135

300 South 20th Street
Waco, Texas 76701

Power. Our lives depend on it. From everyday necessities like heating, cooling, refrigeration and lights, to daily essentials like cooking, laundry or kids’ bath times.

Power outages are occurring more frequently than ever and lasting longer with devastating effects. Stand up to unpredictable weather and unforeseen outages with the most trusted name in residential standby power. If the power ever goes out, your standby generator goes on – automatically – protecting you and your home 24/7.


Nemmer Electric recommends Generac and Kohler Residential Standby Generators.


Some frequently asked questions regarding standby generators:
What is an automatic standby generator?

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.

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?

Find Use the easy tools on Generac’s website to help choose the right size standby generator for your home.

Do they have to be maintained?

Yes, simple maintenance is required. All generators require periodic oil and filter changes to ensure maximum performance for years of reliable service. Preventative maintenance kits are available and many dealers offer annual maintenance contracts for a worry-free ownership experience. Refer to the owner’s manual for routine maintenance procedures and schedules.

What type of oil should I use?

An SAE rated high detergent oil that meets API Service Class SF requirements for gasoline engines, similar to your car. Refer to your owner’s manual for details.

What happens if the generator gets overloaded?

Generators are equipped with overload protection. In the rare event of an overload, the generator’s circuit breaker will trip, disconnecting the unit from the load. Simply correct the overload and reset the breaker in the generator.

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