Generac Guides: How Long Do Generac Generators Last?

Vance Electric • November 16, 2021

According to one analysis, the US has more power outages than any other developed nation. What do you do when the power goes out? What if you didn't need to know the answer to that question?

If you have a generator, your power stays on. Generac generators have been providing reliable backup power since 1959. You can count on Generac portable and standby generators for years of service.

Learn more here about how long a Generac generator will last. You'll be ready to make the investment.

How Long Will a Generac Generator Run?

Knowing how long your generator will run non-stop depends on a few factors. The first thing to consider is the type of generator you have.

Generac makes standby and portable generators. A standby generator provides power to your whole house or business. It turns on automatically when the power goes out.

Portable generators run only your important appliances. They're intended for shorter, temporary use.

Generac Standby Generators

A Generac whole house generator connects to your home's natural gas line or liquid propane fuel supply. It can run almost indefinitely on natural gas unless the gas line has a problem or a mechanical issue occurs. It will run just as long on propane if you have your home propane tank refilled regularly.

Generac standby generators for business will run on natural gas, propane, or diesel. How long a diesel generator can run depends on several factors, including:

Generator size
Fuel tank size
Average generator load
Upkeep and maintenance

An authorized Generac dealer will help you find the model with enough running time for your needs.

Generac Portable Generators

In general, a portable generator that holds more fuel will have a longer continuous run time. How long the generator will run depends on several factors:

Generator size
Fuel tank size
Average generator load
Upkeep and maintenance

Generac has several sizes of portable generators to choose from. The more power the generator produces, the more fuel it will use. Common fuel tank sizes range from 20 lbs (5 gallons) to 1,000 gallons.

Generac portable generators typically run on gasoline.

If a generator uses three gallons of fuel an hour at a 25% load, it may use five gallons per hour at 100% load. With a 500 gallon tank, the generator would run for around 100 hours using five gallons an hour. You could run the generator twice as long with a 1,000 gallon tank.

A well-maintained generator will work more efficiently. You'll get more running time.

How Long Do Generac Generators Last?

The typical lifespan for Generac standby generators is 25 to 30 years. For applications outside of standby, engine life depends on:

Run hours
Maintenance cycles
Installation quality

Generac engines are specifically designed for generators. They will run for around 3,000 hours.

Most people only need to run their generator a few days a year. This is why Generac estimates the average generator lifespan to be 25 to 30 years. The US Energy Information Administration reports that the year-average power outage in 2018 ranged from 1.5 hours in South Dakota to almost 30 hours in North Carolina.

The standard Generac warranty lasts for five years. You can purchase an extended seven- to ten-year warranty. The warranty covers repairs from product defects and parts that need to be replaced sooner than normal.

How to Extend the Life of Your Generac Generator

Generac generators are durable, reliable, and long-lasting. To get the most life from your generator, it's important to choose a unit that's the right size for your needs. Regular maintenance will also extend the life of your generator.

Pick the Right Size Generator

Generators have a power output measured in watts. The amount of power determines how many appliances you can run at once. Using a generator that's too small for your needs will shorten the life of the generator.

You can estimate the size generator you need by adding up the wattage of everything you want to power during an outage. Keep in mind that appliances like air conditioners and refrigerators draw more wattage when they cycle on. You'll need to add the running wattage and the starting wattage of these appliances to find their total wattage.

Considering how often and for how long you expect to need the generator will also help you pick the right size. If you have frequent power outages, you'll need a larger unit than if you only lose power occasionally.

Choose a generator that can handle all of your power needs while working at no more than 90% capacity.

Yearly Maintenance

Most Generac generators need maintenance once a year. The owner's manual for your Generac generator will give you a complete maintenance list. You can buy the maintenance kit for your unit from your Generac dealer or directly from the manufacturer.

Some of the maintenance items include:

Changing the oil
Changing the air filter
Change the spark plugs
Check for cracks or instability in the concrete base
Touch up chipped paint and remove scratches

Following a regular maintenance schedule keeps your generator in top working condition. It also keeps your warranty valid. A professional generator technician can perform your yearly maintenance if you prefer not to do it yourself.

Daily Maintenance

During periods when you're running your generator continuously, it's a good idea to give it a break every 24 hours or so. Check daily for:

Dirt and debris inside the unit
Leaks in the fuel and oil lines
Proper oil level

Inspecting your generator daily will help you catch small issues before they become major problems.

Getting the Most from Your Generac Generator

A Generac standby or portable generator will give you years of reliable power. Keeping your unit properly maintained will give your generator an even longer life.

Vancelectric is your trusted dealer for Generac generators. We've been serving northern Virginia and North Carolina since 1998. Our skilled, non-commission staff will install, repair, and maintain your residential or commercial generator.

We can help you choose the best Generac generator for your home or business. Contact us today for all your generator needs.

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Storm Preparedness: Why Backup Power Is a Must-Have for Your Family

By Vanceelectric • March 18, 2025

According to the National Centers for Environmental Information, each of the twenty-seven weather disasters that occurred in 2024 cost more than one billion dollars . Part of the reason these storms are so expensive is that they can knock out power infrastructure, causing outages. That is why it is so essential to have home backup power . But where do you get this type of reliable power backup power? And what safety considerations should you take into account? This emergency power options guide will answer these questions to prepare you for the next storm. The Risks of Power Outages During Storms Power outages during storms create various challenges, many of which can severely impact families. Losing electricity disrupts everyday routines, affecting lighting, heating or cooling systems, and access to communication. This makes staying connected with emergency services, loved ones, and weather updates difficult, leaving families vulnerable during a crisis. Beyond daily inconveniences, power outages also pose significant health and safety risks. Without refrigeration, perishable food can spoil, increasing the risk of foodborne illness. A prolonged outage can become a medical emergency for individuals who rely on medical devices such as oxygen concentrators or CPAP machines. Additionally, extreme temperatures can make homes uninhabitable, leading to dangerous conditions, particularly for children, older people, and those with health concerns. The financial burden of power outages can also be substantial. A sudden power surge can damage expensive electronics and appliances, leading to costly repairs or replacements. Types of Backup Power Solutions Several types of home backup power solutions are available, each with unique benefits and considerations. Portable generators offer a cost-effective and flexible option capable of powering select appliances. However, they require manual setup, fuel storage, and proper ventilation to prevent carbon monoxide poisoning. These generators are ideal for short-term power outages but require careful handling to ensure safety and efficiency. Learn more about in-stock generators . Standby residential power generators provide automatic power restoration during an outage for a more seamless solution. These units are permanently installed and typically run on natural gas or propane, eliminating the need for refueling. Standby generators can power an entire home and offer a reliable, long-term solution. However, they require professional installation and regular maintenance to maintain optimal working conditions. Read about professional generator installations and their benefits. Battery backup power systems provide another alternative, storing electricity during outages. While they are well-suited for short-term power needs, their effectiveness depends on battery capacity. For families looking for a sustainable and long-term solution, combining solar power with battery storage ensures electricity is available even during extended outages. Just make sure you are choosing the right generator . Choosing the Right Backup Power for Your Family Selecting the best backup power solution depends on various factors, including household power needs, budget, fuel availability, and ease of maintenance. Assessing power requirements is the first step in determining which appliances and systems must be operational during an outage. Understanding essential devices' wattage and energy consumption helps identify the appropriate generator size. Find the size generator you need to ensure your home is adequately powered. Budget is another critical consideration. Portable generators have a lower upfront cost but may require frequent refueling and maintenance. Standby generators involve a higher initial investment but provide automatic power restoration and long-term reliability. Battery backup systems and solar power solutions also have varying price points, with potential long-term savings on energy costs. Explore the complete guide to generator installation to make an informed decision. Fuel availability plays a crucial role in backup power planning. Portable generators often run on gasoline, which can be scarce during severe weather events. Standby natural gas or propane generators provide a more consistent fuel source. Battery-powered solutions eliminate the need for fuel but depend on stored energy capacity. Learn about the benefits of a Generac standby generator for a dependable energy source. Some generators require frequent servicing, while others offer automated operation with minimal intervention. Proper installation and routine maintenance ensure the system functions correctly when needed. Get essential maintenance tips to extend the lifespan of your generator. Safety Considerations When Using Backup Power Backup power solutions provide security during power outages, but proper usage is essential to prevent safety hazards. Portable generators can produce carbon monoxide poisoning , which is a significant risk. Therefore, it is crucial to operate them outdoors, away from windows and doors. Homeowners should install carbon monoxide detectors to monitor indoor air quality and prevent exposure to this deadly gas. Electrical hazards are another concern when using backup power. Qualified professionals should always install generators to avoid the risk of electrical shocks, short circuits, or fire hazards. Proper grounding and adherence to local electrical codes ensure safe operation. Find out more about preparing your home for generator installation. Safe fuel storage and handling are also vital when using generators. Gasoline and propane should be stored in approved containers and kept away from living spaces. Spills should be cleaned immediately to reduce fire risks. Routine maintenance, including oil changes and component inspections, helps keep generators in peak condition and ready for emergency use. Learn more about generator repair and warranty services . Additional Storm Preparedness Tips Beyond the benefits of professional generator installation for backup power, families should take additional steps to prepare for storms. Create an emergency kit stocked with the following: Non-perishable food Water First-aid supplies Flashlights Extra batteries A battery-powered radio or alternative communication method helps families stay informed about storm developments and emergency updates. Developing a family emergency plan is also critical. Establishing communication protocols, designating meeting points, and outlining evacuation routes help ensure everyone knows their role during an emergency. Staying informed through weather forecasts and local emergency alerts provides valuable time to implement preparedness measures. Need Home Backup Power? Contact Vance Electric Investing in a reliable home backup power system is a crucial component of storm preparedness. It ensures your family's safety, comfort, and financial well-being during unforeseen power outages. Here at Vance Electric, we know how important it is to get an experienced installer for your backup needs. That is why we offer nearly three decades of experience. So, if you are ready for the electric help you need, contact us today.