How Much Does It Cost to Install a Generac 22kW Generator? (Prices)

Power outages can disrupt daily life and pose significant risks to homes and businesses. From spoiled food and uncomfortable living conditions to potential damage to electrical appliances and equipment, the consequences of extended power outages can be severe. 

Backup generators offer a reliable solution to mitigate these risks and provide uninterrupted power supply during emergencies. This article will explore the significance and cost of backup generators, with a particular focus on the Generac 22kW generator.

Generac Generators

Generac generators are renowned for their reliability and performance. This powerful generator is designed to meet the needs of both residential and commercial applications, ensuring that critical systems and appliances continue to function when the grid fails.

They are equipped with advanced features such as automatic startup, self-diagnostic capabilities, and quiet operation. Generac generators are designed to seamlessly integrate with your electrical system, ensuring a smooth transition to backup power when needed.

One of the standout features of Generac generators is their ability to automatically detect power outages and initiate startup. This hands-free operation ensures that your backup power supply kicks in without any manual intervention, even if you’re not at home. 

setting up generac generator

This level of automation is crucial for maintaining the continuous operation of essential appliances and systems. Generac generators are versatile when it comes to fuel sources. 

They can run on natural gas or liquid propane, offering homeowners and businesses flexibility in choosing the most convenient and readily available option. These generators are designed for hassle-free operation, decreasing the need for refueling during extended power outages.

Cost of Different Generac Generators

Generator ModelDescriptionFully Installed Price
Guardian 26kW Home Backup Generac GeneratorWhole House Switch WiFi-Enabled$10,500
Guardian 26kW Home Backup Generac GeneratorWiFi-Enabled$10,700
Guardian 24kW Home Backup Generac GeneratorWhole House Switch WiFi-Enabled$10,900
Guardian 24kW Home Backup Generac GeneratorWiFi-Enabled$10,300
Guardian 22kW Home Backup GeneratorWhole House Transfer Switch WiFi-Enabled$10,700
Guardian 22kW Home Backup Generac GeneratorWiFi-Enabled$9,900
Guardian 3-Phase 20kW Automatic Standby Generac GeneratorWifi Enabled$10,900
Guardian 18kW Home Backup Generac GeneratorWhole House Switch WiFi-Enabled$10,200
Guardian 18kW Home Backup Generac GeneratorWiFi-Enabled$9,400
Guardian 14kW Home Backup Generac GeneratorWhole House Switch WiFi-Enabled$9,300
Guardian 14kW Home Backup Generac Generator16-circuit Transfer Switch WiFi-Enabled$9,200
Guardian 14kW Home Backup Generac GeneratorWiFi-Enabled$8,600
Guardian 10kW Generac Generator16-circuit Transfer Switch WiFi-Enabled$8,300
Guardian 10kW Home Backup Generac GeneratorWiFi Enabled$7,700
PowerPact 7.5kW Home Backup Generac Generator8-circuit Transfer Switch$6,500

These are various Generac generator models with different features and capacities, along with their fully installed prices. The prices may vary depending on installation requirements and optional features.

Cost Factors for Installing a Generac 22kW Generator

Generator Size and Capacity

The cost of installing a Generac generator is influenced by factors such as the generator’s size and the complexity of the installation. In general, a typical Generac generator installation can range from $3,000 to $20,000.

generac generator

Larger generators tend to have higher installation costs. For instance, a 10 kW generator, including installation, may be priced at approximately $4,500, while the installation cost for a 22 kW generator can go up to $10,000.

The size and capacity of a backup generator play a significant role in its cost. The Generac 22kW generator is suitable for powering an entire household or small to medium-sized business, making it a versatile choice. 

Generac provides an online sizing calculator that can help determine the appropriate generator size for your specific needs. By inputting essential information, such as the number and type of appliances, the calculator can provide a recommended generator size.

Power Needs Assessment

Assessing your power needs is a critical step in determining the appropriate generator size. 

Consider the essential appliances and systems you want to power during an outage, such as heating and cooling systems, refrigerators, lights, and medical equipment. Accurate sizing ensures that your generator can meet your specific requirements without overloading.

Choice of Power Source (e.g., Natural Gas, Propane)

The choice of fuel source can affect both the installation cost and long-term operation of your Generac generator. Natural gas is a convenient option if you have access to a gas line, while propane [1] offers versatility and can be stored for extended periods. 


The availability and cost of your chosen fuel source should be considered when calculating overall expenses.

Power Source OptionsCost
Natural Gas$2,000 – $21,000
Liquid Propane$2,000 – $21,000 (portable models: $600 – $2,600)
Diesel$3,000 – $20,000
Gasoline$500 – $3,000
Solar$2,000 – $25,000 (whole-home units at least $10,000)
Battery Backup$10,000 – $25,000 (smaller backup batteries available for critical components for as little as $2,000)

Electrical Upgrades or Modifications

In some cases, your electrical system may require upgrades or modifications to accommodate the generator seamlessly. These enhancements can include installing transfer switches, subpanels, or additional wiring. 

electricians working on generac 22kw generator

These upgrades are essential for ensuring the safe and effective operation of your backup generator.

Cost CategoryCost RangeDescription
Electrical Subpanel$530 – $2,000Cost range for upgrading an electrical subpanel
Circuit Add-On$500 – $1,000The average cost for adding a circuit
Burying Utility LineVariesCost associated with digging a trench for utility lines
Wireless Monitor$200 – $400Cost of a wireless monitor for remote generator status
Smart Load Manager$150 – $300Cost of a smart load manager for power distribution

Permit Requirements

Local building codes and regulations may require permits for generator installations. Permit costs can vary depending on your location and the complexity of the installation. It’s essential to factor in permit expenses when budgeting for your Generac 22kW generator installation.

The cost ranges from $50 – $200 for obtaining permits for installation

Installation Costs

Professional installation is highly recommended for Generac generators to ensure safety and proper functioning. Installation costs encompass various aspects, including labor, materials, and any required electrical work. 

Specific FactorsCosts
Energy needs assessmentUsually free of charge
Constructing the concrete pad and preparing the site$50 – $75 per square foot
Fuel tank installation or utility line connection$50 – $100 per hour
Adding new wiring, upgrading the electrical panel, and improving the transfer switch$65 – $85 per hour
Material and equipment costs$300 – $2,000

Please note that these costs are approximate and can vary based on factors such as location, specific requirements, and contractor pricing. It’s advisable to contact an electrician or generator installation expert for a more accurate estimate of your specific needs and circumstances.

connecting generac generator to house

DIY vs. Professional Installation

While some homeowners may consider a DIY installation to save costs, it comes with significant risks. Improper installation can lead to electrical hazards, damage to the generator, and potential safety issues. 

DIY installations may also void warranties, leaving you without manufacturer support in case of problems. Professional installation by certified technicians is the recommended approach for generators. Trained installers have the expertise to ensure a safe and compliant installation. 

They can address electrical requirements, handle necessary permits, and perform load testing to confirm proper operation. Professional installation provides peace of mind and ensures that your backup generator functions reliably.

The Installation Process

Professional installation of a Generac 22kW generator typically follows these steps:

installing generac generator
  1. Site assessment to determine the generator’s location
  2. Obtaining necessary permits and approvals
  3. Installation of the generator and transfer switch
  4. Electrical connections to the main panel
  5. Testing to ensure proper operation
  6. Final inspection and documentation

A site assessment is crucial to determine the best location for your generator, ensuring safety, accessibility, and compliance with local regulations. Obtaining the necessary permits is essential to avoid potential legal issues and ensure that your installation meets all building codes and standards.

Ongoing maintenance costs

While the initial installation cost is a significant consideration, it’s essential to account for ongoing maintenance expenses. Regular maintenance is crucial to keep your Generac generator in optimal condition and extend its lifespan. 

Regular maintenance is essential to ensure the reliability and longevity of your Generac 22kW generator. Neglecting maintenance can lead to costly repairs and potential breakdowns during critical moments. 

generac generator properly installed

Routine maintenance tasks for Generac generators include:

  • Regularly checking oil levels and changing the oil as needed
  • Replacing air and oil filters
  • Inspecting and cleaning spark plugs
  • Testing the battery and ensuring proper connections
  • Verifying the operation of automatic transfer switches
  • Conducting load bank testing to assess the generator’s performance under load

By adhering to a maintenance schedule, you can enjoy peace of mind knowing that your backup power source is ready when needed. Maintenance costs typically include tasks such as oil changes, filter replacements, and battery checks.

Summary of Costs

ItemCost Range
22kW Generac GeneratorStarting at $6,300
Labor and Materials$1,500 – $5,000
Total Generator Installation (average)$5,500
Size & Power OutputVaries based on generator size
Power SourceVaries based on fuel type
Electrical Upgrades or ModificationsVaries based on requirements
Permits$50 – $200
InstallationDepends on complexity
Maintenance$80 – $300 per year
Total Installation Cost (Average)$7,800 – $11,300


When considering generator installation, it’s essential to factor in all costs, including generator size, installation expenses, and ongoing maintenance. Choosing professional installation ensures safety, compliance, and warranty protection.

Investing in a Generac 22kW generator offers numerous benefits, such as its reliability, convenience, and versatility. With a Generac generator, you can enjoy peace of mind, knowing that your essential systems and appliances will stay powered, no matter what challenges arise.


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