Power outages are inconvenient. When they last for hours or affect heating, cooling, refrigeration, medical equipment, internet access, sump pumps or other important systems, they create much bigger problems.
A permanently installed standby generator gives homeowners another option. Instead of bringing out a portable generator and connecting equipment manually, a standby system can detect a utility outage and automatically provide backup power to selected loads or, when properly sized and designed, much of the home. Generac describes home standby systems as permanently installed outdoor units that typically operate on natural gas or liquid propane and work with transfer-switch technology to supply backup power when utility power is lost.
Your home’s electrical demand, the equipment you want to keep running, generator placement, fuel availability, transfer equipment and local permitting requirements all need to be considered.
If you are thinking about standby generator installation in Louisville, KY, here is what to know before moving forward.
Start With What You Want the Generator to Power
One of the first decisions is what you expect your generator to do during an outage.
Some homeowners primarily want to keep essential equipment running. That might include refrigerators, selected lighting, outlets, a sump pump, internet equipment or certain heating equipment. Others want broader backup power that allows the home to operate much more normally during an extended outage.
That distinction matters because the electrical load the generator is expected to carry directly affects system design.
A generator should be sized according to the actual electrical loads it may need to support, including larger equipment and motor-starting requirements. Load-management technology can also be used in some systems to control when certain larger loads operate instead of requiring everything to run simultaneously.
At Laswell, a member of our team will schedule an on-site visit to learn more about your needs and your property.
Whole-Home Backup and Essential-Load Backup Are Not the Same Thing
The phrase whole-home generator can sometimes create the impression that every appliance and electrical load will run simultaneously exactly as it does on utility power.
The actual system design depends on the generator capacity, the home’s electrical demand and whether load management is incorporated.
Some homeowners may want enough capacity for extensive whole-home coverage. For others, prioritizing the systems that matter most during an outage can provide the backup power they need without designing around every possible electrical load.
A professional generator assessment should identify what you want to keep operating and determine how those loads can be supported safely and reliably.
This is also an opportunity to think ahead. If you expect to add an EV charger, new HVAC equipment, a finished basement, a pool or other substantial electrical loads in the future, that information should be part of the planning process.
Your Electrical Panel Is Part of the Conversation
A standby generator becomes part of your home’s electrical system, so the existing service and panel configuration need to be evaluated as part of the project.
That does not mean every generator installation requires an electrical panel replacement.
Instead, an electrician needs to understand the existing service, how power is distributed throughout the home and how the generator and transfer equipment will integrate with that system.
The National Electrical Code addresses optional standby systems under Article 702. Transfer equipment is an important part of these installations because the normal utility source and standby source must be arranged so they are not inadvertently interconnected.
If the home’s electrical system has other capacity or condition issues, those can be identified during the assessment rather than discovered after the generator has already been selected.
The Automatic Transfer Switch Is a Critical Part of the System
The generator itself gets most of the attention, but the automatic transfer switch is what allows a standby system to respond without someone manually changing the home’s power source.
When utility power is interrupted, an automatic standby system can start the generator and transfer the appropriate electrical loads to generator power. Once utility service returns, the transfer switch changes the home back to utility power and the generator shuts down.
That automatic operation is one of the major differences between a permanently installed standby generator and relying on a portable generator during an outage.
It also means the generator, transfer equipment and home’s electrical system need to be designed as one coordinated system.
Generator Placement Requires Planning
A standby generator cannot simply be placed wherever there happens to be room outside.
The installation location needs to account for the manufacturer’s requirements, access for future maintenance, the electrical connection, fuel connection and site conditions.
Generac recommends selecting a stable, well-drained location with sufficient access for servicing the equipment. Its installation guidance also specifies clearances that must be followed for the particular generator and site.
The best location will vary from one property to another. A site evaluation allows the installer to look at the home, utilities and surrounding conditions before recommending placement.
Fuel Source Is Another Important Consideration
Residential standby generators commonly operate on natural gas or liquid propane, depending on the generator and what is available at the property.
The fuel side of the project needs to be considered alongside the electrical installation. Generator size, fuel demand, existing infrastructure and the distance between the generator and fuel source can all affect the installation plan.
That is another reason it makes sense to evaluate the complete project before selecting equipment.
Permits and Inspections Are Part of a Professional Installation
Permanent generator installation involves more than setting equipment beside the house and connecting wires.
Louisville Metro states that electrical work covered by Kentucky Building and Electrical Codes requires an electrical permit before work begins. Work requiring a permit must also be inspected before final approval.
Requirements can vary depending on the property and jurisdiction, particularly for homeowners outside Louisville Metro.
Working with an experienced installer helps ensure those requirements are considered as part of the project rather than treated as an afterthought.
What Happens During a Standby Generator Installation?
The exact process varies from home to home, but a professional installation generally starts well before the generator arrives.
First, the home’s backup-power goals and electrical loads are evaluated. That helps determine the appropriate generator capacity and whether load management should be part of the system.
Next comes site planning. The installer determines an appropriate generator location and evaluates the path for electrical and fuel connections.
Once the equipment and installation plan are established, required permitting can be completed and the installation scheduled.
The generator is then positioned on the prepared site, connected to the home’s electrical system through appropriate transfer equipment, and connected to its fuel source. Generac’s installation guidance describes site preparation, transfer-switch installation, electrical and fuel connections, and a simulated outage test as parts of a typical standby-generator installation.
Testing is important because the finished system needs to do more than simply start. The generator and transfer equipment should work together properly when utility power disappears and when it returns.
Does a Standby Generator Need Maintenance?
Yes. A standby generator may spend most of its life waiting for an outage, but it still contains an engine, battery, filters and other components that need periodic attention.
Generac recommends following the maintenance schedule for the specific unit, including items such as oil and filter service. The appropriate service interval can vary by generator and usage.
Regular maintenance is particularly important because a backup generator has a job that is easy to forget about until utility power is already gone.
Should You Install a Standby Generator?
A standby generator may be worth considering if extended outages would create significant problems for your home, if you want automatic backup rather than managing a portable generator, or if there are important systems you want to keep operating when utility power is unavailable.
Standby Generator Installation in Louisville, KY
If you are considering a standby generator, Laswell can help you understand the options before you make a decision.
Since 1995, Laswell has served homeowners throughout Louisville, surrounding Kentucky communities and Southern Indiana. Our team provides standby generator installation along with residential electrical services designed around the needs of each property. Laswell’s existing generator guidance also notes that the team evaluates power needs and handles generator installations from planning through completion.
Frequently Asked Questions About Standby Generator Installation
Does a standby generator turn on automatically?
An automatic home standby system can detect the loss of utility power, start the generator and use an automatic transfer switch to supply the designated electrical loads. When utility power returns, the system transfers back to utility service.
Can a standby generator power my entire house?
It can, depending on the generator, the home’s electrical demand and the system design. Other installations are designed around essential loads or use load management to control larger equipment. Proper sizing should be based on the loads the generator is expected to serve rather than simply the size of the house.
Does installing a generator mean I need a new electrical panel?
Not necessarily. The existing electrical service and panel should be evaluated to determine how the generator and transfer equipment will integrate with the home. A panel upgrade would depend on the condition and configuration of the existing electrical system and the requirements of the planned installation.
Where does a standby generator go?
Standby generators are installed outdoors. The specific location depends on manufacturer requirements, available space, maintenance access, site conditions, and proximity to electrical and fuel connections.
Does Louisville require a permit for generator electrical work?
Louisville Metro requires permits for electrical work covered by Kentucky Building and Electrical Codes, and permitted work is subject to inspection. Requirements outside Louisville Metro may differ by jurisdiction. If a permit is required, Laswell will take care of the process for you.
How do I know what size standby generator I need?
Generator sizing depends on the electrical loads you want to support, including larger appliances, HVAC equipment, motor-starting requirements and any load-management strategy being used. A load evaluation is the appropriate starting point.
