Generac Generator FAQs: Everything You Need to Know

Frequently Asked Questions (FAQs)

Welcome to our collection of FAQs. Here, we address the most common inquiries regarding Generac generators, their installation, maintenance, and overall performance. Explore our FAQs for quick answers or contact us for personalized assistance.

Welcome to our comprehensive Generac Generator FAQs resource. As an authorized Generac dealer specializing in both residential and commercial installations, we’ve compiled answers to the most common questions our customers ask. Whether you’re considering a whole home standby generator, wondering about installation requirements, or need information about maintenance and operation, you’ll find clear, detailed answers here. Our team of certified Generac technicians brings years of experience to every installation, ensuring your home or business stays powered even when the grid goes down. Browse through these FAQs or contact us directly for personalized assistance with your power protection needs

What size generator do I need for my home?

Consult our FAQs for more tips on how to choose the right generator size tailored to your specific needs.

Sizing your generator correctly is crucial for proper performance. For most average-sized homes (2,000-3,000 sq ft), a 16-22kW generator can power essential appliances and systems. Larger homes with additional power demands may require 22-48kW units. During your free consultation, our technicians will assess your specific needs by calculating your electrical load requirements based on your home’s square footage, appliances, and your personal preferences for what you want powered during an outage.

How do Generac generators compare to other brands?

Generac is the #1 selling home standby generator brand in America with over 70 years of experience. Their generators offer superior reliability, comprehensive warranty coverage, and innovative features like Mobile Link™ remote monitoring. Generac manufactures their own engines specifically designed for generator use, unlike competitors who often adapt automotive or industrial engines. This specialized design results in better performance, longer lifespan, and more efficient operation during extended power outages.

What makes Generac stand out in the market?

Generac leads the generator industry through continuous innovation, superior engineering, and comprehensive support. Their exclusive features include:

• True Power™ Technology providing less than 5% harmonic distortion for sensitive electronics
• Quiet-Test™ self-test mode that runs at lower RPMs for reduced noise and fuel consumption
• Mobile Link™ remote monitoring system allowing you to check generator status from anywhere
• Generac’s G-Force Engine specifically designed for generators, providing reliable power in the harshest conditions

What’s the difference between standby and portable generators?

Standby Generators:

• Permanently installed and connected to your home’s electrical system
• Automatically activate during power outages (no manual starting)
• Run on natural gas or propane for extended operation
• Power most or all of your home’s electrical systems
• Operate more quietly and efficiently
• Higher initial investment but greater convenience and protection

Portable Generators:

• Temporary power solution that must be manually set up
• Typically run on gasoline that needs regular refilling
• Power limited circuits through extension cords or manual transfer switch
• Generally louder and less efficient
• Lower upfront cost but more maintenance and manual operation

Pre-Purchase Information

What are the upfront costs for Generac generators?

Common FAQs we receive are about the cost for a Generac Generator. The total investment for a Generac home standby generator system typically ranges from $7,000 to $15,000+ depending on:

• Generator size and model
• Installation complexity
• Local permit requirements
• Electrical panel upgrades (if needed)
• Fuel source connections

We provide detailed, transparent quotes with no hidden fees during our consultation process. We also offer seasonal promotions and financing options to make protecting your home more affordable.

Are there financing options available?

Yes! We offer multiple financing options with competitive rates and flexible payment terms through our financing partners. Options include:

• 0% interest plans (for qualified buyers)
• Low monthly payment options
• No down payment required in many cases
• Easy online application process
• Quick approval decisions

During your consultation, we can answer any FAQs and help you explore which financing solution best fits your budget and needs.

How long does installation typically take?

Most residential Generac generator installations are completed within 1-2 days. The process includes:

• Day 1: Concrete pad installation, generator placement, and fuel line connection
• Day 2: Electrical connections, transfer switch installation, and system testing

Factors that can affect timeline include weather conditions, permit processing, and any necessary electrical panel upgrades. Our team will provide you with a specific timeline based on your individual installation requirements.

What permits are required for installation?

Generator installations typically require electrical, mechanical, and sometimes zoning permits. Requirements vary by municipality, but often include:

• Electrical permits for transfer switch installation and connections
• Mechanical permits for fuel line connections
• Zoning permits addressing placement, noise ordinances, and setback requirements

Our team handles the entire permitting process for you, including application submission, documentation, and scheduling any required inspections.

Do I need site preparation before installation?

Our installation process includes standard site preparation. This covers:

• Level ground preparation
• Concrete pad installation
• Basic landscaping adjustments
• Fuel line trenching and connection
• Electrical connection planning

For homes with challenging terrain or special requirements, additional site preparation may be necessary. Our technicians will assess your property during the consultation, answer any FAQs, and advise on any special considerations.

Installation Process

What’s involved in a typical Generac installation?

Our professional installation process includes:

1. Site Evaluation: Determining optimal generator placement and assessing electrical needs
2. Permit Acquisition: Handling all necessary permits and compliance documentation
3. Site Preparation: Installing a level concrete pad and preparing the area
4. Generator Placement: Carefully positioning and securing your generator
5. Fuel Connection: Connecting to natural gas line or installing propane tank
6. Electrical Integration: Installing transfer switch and connecting to your electrical panel
7. System Testing: Comprehensive testing of all systems and functions
8. Customer Orientation: Complete walkthrough and operational training

Where should my generator be placed on my property?

Optimal generator placement balances code requirements, efficiency, and aesthetics:

• Code Requirements: Local ordinances typically require generators to be at least 5 feet from doors and windows and 18 inches from your home’s structure
• Efficiency Considerations: Closer proximity to your electrical panel and fuel source reduces installation costs
• Noise Factors: Placement away from bedrooms and neighboring properties minimizes noise impact
• Accessibility: Sufficient clearance for maintenance and service (minimum 3 feet on all sides)
• Aesthetics: Strategic placement to minimize visual impact, sometimes utilizing landscaping

Our technicians will recommend the optimal location based on these factors and your property’s specific characteristics.

How is the generator connected to my home’s electrical system?

Your Generac generator connects to your home through an automatic transfer switch (ATS), which is installed beside your main electrical panel. The process works as follows:

1. The ATS constantly monitors utility power
2. When an outage occurs, the ATS signals the generator to start
3. Once the generator reaches proper voltage/frequency (typically within 30 seconds), the ATS transfers your electrical load from the utility to the generator
4. When utility power returns, the ATS transfers your home back to grid power and signals the generator to shut down after a cool-down period

The entire process is automatic, requiring no manual intervention.

What fuel options are available for Generac generators?

Generac home standby generators can run on:

Natural Gas:

• Connects to your home’s existing natural gas line
• Unlimited run time without refueling
• Lower fuel cost per kilowatt-hour
• Generally lower maintenance requirements
• Ideal if natural gas service is already available

Liquid Propane (LP):

• Stored in above-ground or underground tanks
• Excellent for areas without natural gas service
• Clean-burning with minimal maintenance impact
• Tank sizes typically range from 250 to 1,000 gallons
• Runtime depends on tank size and generator load

Dual-Fuel Capability:

• Some models can run on either natural gas or propane
• Provides flexibility and backup fuel options
• Automatic switching available on select models

We’ll help you determine the best fuel option based on your location, preferences, and available infrastructure.

Maintenance & Operation

How often does a Generac generator need maintenance?

Generac recommends the following maintenance schedule:

• Monthly: Visual inspection and brief self-test run (automatically performed by the generator)
• Every 6 Months or 200 Hours: Oil and filter change, battery inspection, general system check
• Annually: Comprehensive inspection including spark plugs, fuel system, cooling system, and electrical connections

Our maintenance plans can be customized to handle all required service, ensuring your system remains ready for any power emergency.

What maintenance can I do myself versus requiring a technician?

DIY Maintenance:

• Visual inspections for debris, pests, or physical damage
• Checking oil levels (when the unit is cool)
• Keeping the surrounding area clear of debris and vegetation
• Monitoring for unusual noises during self-test cycles
• Checking and cleaning the exterior

Professional Maintenance:

• Oil and filter changes
• Spark plug inspection and replacement
• Fuel system adjustments and cleaning
• Battery testing and replacement
• Transfer switch testing and servicing
• Firmware updates and diagnostic testing

While some homeowners with mechanical experience may handle basic maintenance, professional service ensures warranty compliance and optimal performance.

Our FAQs detail how much fuel storage you should have based on your generator’s specifications.

How loud are Generac generators during operation?

Generac home standby generators operate at approximately 60-70 decibels at normal load, comparable to a central air conditioning unit. Factors affecting noise levels include:

• Generator Size: Larger units may produce more sound
• Load Level: Higher electrical demands can increase noise
• Installation Location: Proximity to structures can amplify or dampen sound
• Sound Attenuation: Optional sound enclosures are available for noise-sensitive locations

The Quiet-Test™ self-test mode runs at just 57-60 decibels, quieter than a normal conversation, to minimize disturbance during routine testing.

How quickly does the generator activate during a power outage?

Generac generators typically detect an outage within seconds and begin the startup sequence immediately. The complete transition timeline is:

1. Outage detection: Immediate (within milliseconds)
2. Engine startup: 5-10 seconds
3. Generator stabilization: 10-15 seconds
4. Transfer switch activation: 5 seconds
5. Total time to restored power: Approximately 30 seconds

During this brief transition, we recommend surge protectors for sensitive electronics. Once running, your generator provides continuous power until utility service is restored.

What’s included in your maintenance packages?

Our comprehensive maintenance plans include:

Basic Plan:

• Biannual scheduled maintenance visits
• Oil and filter changes
• Basic system inspection
• Priority scheduling for service calls
• 10% discount on parts and labor for repairs

Premium Plan:

• Quarterly scheduled maintenance
• All fluid changes and filters
• Comprehensive system inspection and testing
• Priority emergency response
• 15% discount on parts and labor
• Annual transfer switch testing and servicing
• Mobile Link™ remote monitoring alerts to our service team
• Battery replacement every two years

Ultimate Plan:

• All Premium Plan services
• Guaranteed 24-hour emergency response
• Parts and labor for all repairs included
• Annual system software updates
• Extended warranty options
• Free loaner portable generator during extended repairs

Warranty & Service

What warranty coverage comes with a Generac generator?

Generac provides industry-leading warranty protection:

• 5-Year Limited Warranty: Standard on all home standby generators, covering parts, labor, and travel for the first two years, and parts only for years 3-5
• 10-Year Extended Limited Warranty: Available for purchase, providing comprehensive coverage for a decade of protection
• Warranty Transferability: Coverage can transfer to new homeowners if you sell your property

As an authorized Generac dealer, we handle all warranty service with factory-certified technicians and genuine Generac parts.

What’s covered under the warranty versus what’s not?

Covered Under Warranty:

• Manufacturing defects in materials and workmanship
• Electronic control systems and components
• Engine and alternator assemblies
• Transfer switch components (if purchased together)
• Labor and travel costs (first two years of standard warranty)

Not Typically Covered:

• Routine maintenance items (filters, oil, spark plugs)
• Damage from improper maintenance or operation
• Acts of nature beyond normal operating parameters
• Cosmetic issues not affecting performance
• Battery replacement after the first year
• Damage from improper installation (if not installed by an authorized dealer)

We provide detailed warranty documentation at installation and can explain coverage specifics for your chosen model.

How do I schedule service or maintenance?

Scheduling service is simple:

1. Call our dedicated service line
2. Email us
3. Fill out our website’s online form

For emergency service, our 24/7 response team is available by phone. Maintenance plan customers receive priority scheduling and dedicated support.

What’s the expected lifespan of a Generac generator?

With proper maintenance, Generac home standby generators typically provide:

• 15-20 years of reliable service for residential units
• 20-25 years for commercial-grade systems

Factors affecting lifespan include:

• Frequency and duration of use
• Adherence to maintenance schedules
• Environmental conditions
• Load management practices
• Fuel quality and type

Explore our FAQs to understand the maintenance needs of your new generator.

Many of our customers’ generators have exceeded these estimates with our professional maintenance program.

Emergency Preparedness

How much fuel storage do I need?

Fuel requirements depend on your generator’s size and the electrical load it’s supporting:

Natural Gas:

• Connected to municipal supply, so no onsite storage needed
• Verify your gas meter can support both your home and generator simultaneously
• We can coordinate with your gas utility if meter upgrades are needed

Propane (LP):

• 500-gallon tank typically provides 7-10 days of continuous operation at full load
• The same tank can last 14-20 days at 50% load
• For extended outages or primary power applications, multiple or larger tanks may be recommended

Our technicians can calculate your specific fuel consumption based on your generator model and expected electrical load.

How long can a Generac generator run continuously?

Generac standby generators are designed for extended operation:

• Natural Gas Systems: Can run indefinitely as long as the gas supply remains connected
• Propane Systems: Run time limited by tank size (typically 1-3 weeks on a standard residential tank)

All standby generators require periodic maintenance shutdowns during extended operation, typically:

• Brief shutdown every 24 hours of continuous running for self-diagnosis
• Oil change may be required after 200 hours of continuous operation

Our systems include provisions to minimize disruption during these maintenance cycles.

What items/appliances can I power during an outage?

Depending on your generator’s capacity, you can power:

10-14kW Systems:

• Essential circuits only: refrigerator, freezer, sump pump, furnace, well pump, essential lighting, and basic electronics

16-22kW Systems:

• Most of a medium-sized home: all essentials plus central air conditioning (limited size), electric range, washer/dryer, and additional convenience circuits

22-48kW Systems:

• Entire home power: all appliances and systems including multiple HVAC systems, electric vehicle chargers, and large luxury homes

During your consultation, we’ll create a detailed load management plan based on your specific priorities and electrical needs.

Can a generator power my entire home/business?

Yes, with proper sizing and installation, Generac generators can power your entire property. Whole-home coverage typically requires:

• Residential: 16kW+ for smaller homes, 22-48kW for larger homes
• Commercial: 25-150kW depending on business type and size

For properties with extremely high power demands, options include:

• Load management systems that prioritize essential systems
• Multiple generator installations working in parallel
• Hybrid solutions combining generators with battery backup

As a BBB A+ rated business, we are confident that our engineers can design a system that meets your complete power requirements or create a strategic partial-coverage solution based on your priorities and budget.

If you have additional questions that are not answered in our FAQs, feel free to reach out to our knowledgeable team who can provide you with the information you need.