When power outages strike, an automatic standby generator can be a lifesaver, keeping your home running smoothly. These powerful devices automatically kick in when the electricity goes out, providing seamless power to your entire house—including essentials like heating, cooling, and refrigeration.
In this guide, we’ll walk you through the process of installing an automatic standby generator so that you can prepare for unexpected blackouts. You can follow along in the video above as This Old House host Kevin O’Connor explores the installation process with expert Scott, demonstrating the impressive capabilities of a 20,000-watt automatic standby generator.
Understanding Automatic Standby Generators
Automatic standby generators are permanent fixtures that provide backup power to your home during outages. Unlike portable generators, these systems are connected directly to your home’s electrical system and natural gas or propane supply.
How They Work
When the power goes out, an automatic transfer switch detects the loss of electricity and signals the generator to start. Within seconds, the generator begins supplying power to your home’s electrical circuits. Once the utility company restores power, the system automatically switches back and shuts down the generator.
Benefits of Automatic Standby Generators
Automatic standby generators have several perks, such as the following:
- Automatic operation
- Immediate power restoration
- Increased home value
- Peace of mind during severe weather events
- Whole-house coverage
Having a generator ensures that your home remains functional during power outages, which can be particularly crucial during extreme temperatures. Additionally, because these systems transfer power automatically, you won’t need to start them during storms or unforeseen outages manually.
Preparing for Automatic Standby Generator Installation
Before installing an automatic standby generator, you’ll need to take several preparatory steps to ensure a smooth, safe process.
Choosing the Right Generator
Start by determining the appropriate generator for your home. You’ll need to get the right size to correctly handle your home’s power demands. Undersized generators can strain to supply adequate power, while oversized units may be unnecessarily expensive. Consider the following factors:
- Number of appliances and systems you want to power
- Square footage of your home
- Local climate and potential for extended outages
Obtaining Permits and Approvals
Many local municipalities require permits for generator installation to ensure safety and compliance with building codes. Failing to obtain necessary permits can lead to fines and might invalidate your homeowner’s insurance.
You can consult your local building department to help you navigate this process, but here are some common permits you might need:
- Electrical permits for wiring
- Plumbing permits for fuel line connections
- Zoning permits that stipulate where you can install the generator
Selecting an Installation Location
Choosing the right location for your generator allows for efficient operation and convenient access for routine maintenance. Install your generator where it is:
- At least 5 feet from all windows, doors, and other combustible structures
- On a level surface
- Easily accessible for maintenance
Avoid placing your generator in areas prone to flooding.
Generator Installation Process
Installing an automatic standby generator involves several key steps only qualified professionals should perform, but here’s a general overview of the process.
Preparing the Site
Proper site preparation prevents future issues with stability and drainage. A durable concrete pad keeps the generator secure and elevated. Here are the steps:
- Clear the chosen area of any obstacles or vegetation
- Create a level surface, if necessary
- Install a pre-cast concrete pad supported by a compacted gravel bed
Securing the Generator
After the site preparation phase is complete, it’s time to place and secure the generator. A professional will do the following:
- Position the generator on the concrete pad
- Secure it with four stainless-steel bolts
- Ensure the unit is level and stable
Properly securing the generator avoids movement or shifting over time, which could damage fuel and electrical connections.
Connecting Fuel and Electrical Lines
With the generator in place, it’s time to connect the necessary utilities. Your installer will take these steps:
- Have a licensed plumber connect the natural gas or propane line
- An electrician should run the line-voltage cable to the generator
- Install a transfer switch beside the electrical meter
The transfer switch is crucial for sending electricity into the house when the power goes out and the generator activates. Hiring professionals for these tasks ensures that the installation adheres to all safety codes and regulations. Remember, proper connections are vital for safe operation.
Automatic Standby Generator Smart Features and Maintenance
Modern automatic standby generators have advanced features that make operation and maintenance easier than ever.
Self-Testing and Diagnostics
These generators conduct regular self-tests, which include the following steps:
- Automatically turning on every two weeks
- Running each test for about 20 minutes
- Sending diagnostic signals to you and your electrician via an internet connection
These self-tests are designed to detect potential problems early, ensuring your generator is always ready to perform during an outage.
Remote Monitoring
Many generators can be connected to the internet, allowing for a high level of convenience and oversight. These generators provide the following features:
- Automatic notifications of power outages or generator activation
- Real-time status updates
- Remote troubleshooting by technicians
Regular Maintenance
Adhering to a regular maintenance schedule will extend the life of your generator and keep it ready to operate when needed. You should follow the manufacturer’s guidelines for best results, but we recommend these general steps:
- Change the oil and filters as recommended by the manufacturer
- Keep the area around the generator clear of debris and vegetation
- Schedule annual professional inspections
Generator Safety Considerations
Always prioritize safety when installing and operating a generator. Here’s some general guidance.
Professional Installation
Always hire licensed professionals for installation to avoid potential hazards and ensure compliance with safety standards. The type of expert you hire will depend on the kind of work you need done. You can use the following list to help you determine who to call:
- Electricians for wiring and transfer switch installation
- Plumbers for fuel line connections
- HVAC technicians for any necessary ventilation work
Professional installations not only keep everyone safe, but they also validate your warranty and ensure compliance with local codes.
Carbon Monoxide Safety
Proper placement and ventilation of your generator prevents carbon monoxide buildup. Follow these safety tips:
- Install carbon monoxide detectors in your home
- Never operate a generator indoors or in an enclosed space
- Place the generator in a well-ventilated outdoor area
Fuel Safety
Handling natural gas or propane requires careful attention. We highly recommend taking the Federal Emergency Management Agency’s generator safety precautions:
- Regularly inspect fuel lines for leaks
- Know how to shut off the fuel supply in an emergency
- Keep the area around fuel connections clear and accessible
Proper fuel safety measures help prevent accidents and create a continuous, safe fuel supply to the generator.
Generator Cost Considerations
The cost of installing an automatic standby generator can vary widely based on several factors. Keep in mind the following when budgeting:
- Generator size and capacity
- Complexity of installation
- Local labor rates
- Permit fees
On average, homeowners can expect to pay between $7,178 and $13,959 to install a generator.* That figure includes the generator unit ($1,458–$8,239), generator installation ($4,520 on average), and transfer switch installation ($1,200 on average). For units that require a natural gas line hookup, expect to pay an additional $15–$20 per linear foot.
Though the initial investment can be significant, the benefits of uninterrupted power supply during outages can be invaluable.
*All cost data for this article sourced from Angi.
Our Conclusion
Installing an automatic standby generator is a significant investment in your home’s safety and comfort. While the process involves several complex steps, the peace of mind and convenience you’ll get during power outages can make it worthwhile.
