A standby system is the version of backup power you do not have to be home for. It sits outside on its own base, monitors the incoming supply, and when that supply drops it starts, takes over, and hands back when utility power returns — without anyone dragging anything out of a shed. We install these systems for homeowners throughout our Middle Tennessee service area, and Generac is the equipment we most often install.
What Is a Whole-House Standby Generator?
A whole-house standby generator is a permanently mounted engine and alternator, wired into the home’s electrical system through a transfer switch that isolates the house from the utility before the generator picks up the load. It runs on a fuel supply already at the property rather than on fuel you carry, and it starts without a person present.
The phrase “whole house” is worth being precise about, because it is where most disappointment starts. A standby system can be sized to carry an entire home, or sized to carry a chosen set of circuits well. Which one you get is a decision made at the planning stage, not a property of the words on the box.
Whole-House Standby Generator or a Portable Generator Inlet?
Both are legitimate answers, and they suit different households. A standby system is automatic, permanent, and the right call when nobody will be home to start anything, when outages are frequent enough to be a pattern, or when something in the house genuinely cannot go dark. A generator inlet and panel interlock is the right call when you already own a portable unit, when you are willing to start it yourself, and when a smaller set of circuits will do.
We install both, which means we have no reason to talk you into the larger one. If you describe the property and what you need running, we will tell you which of the two fits — including when the honest answer is the smaller job.
What a Complete Standby Generator Installation Includes
- The generator itself. We supply and install the unit as part of the project, rather than leaving you to source equipment and find someone to wire it afterward.
- A transfer switch. This is the component that makes the system safe and legal: it guarantees the house is never connected to the utility and the generator at the same time.
- Panel and circuit integration. Deciding what the system carries, arranging those circuits so the switch can serve them, and making the result something the next electrician can read.
- Assessment of the existing service first. An older or fully loaded panel changes the plan, and occasionally an electrical panel upgrade belongs in the same project. If that is the case you hear it during planning.
- Permit and inspection coordination where the local authority requires it.
- A handover. What the system does on its own, what it expects from you, and what the indicators mean when something is not right.
What Size Standby Generator Does a House Need?
The size comes out of a load calculation, not out of the square footage of the house. What matters is what has to run at once and what it draws when it starts: heating and cooling equipment, well and sump pumps, a water heater, refrigeration, a kitchen, and whatever medical or work equipment the household cannot be without.
Motor loads are the reason this needs doing properly. Equipment that idles at a modest draw can demand several times that in the instant it starts, and a system chosen on the total of the nameplate figures alone will stall on a compressor.
This is also the conversation where “whole house” gets settled honestly. Some homes are straightforward to carry entirely. Others are far better served by a system that runs the essentials very well, and it is worth knowing which of those your house is before anything is ordered.
What Affects the Cost of a Whole-House Generator?
We do not publish figures for this work, because a number quoted before anyone has seen the property is a guess wearing a suit. What we can tell you is what actually moves it, so you can judge your own situation before you call:
- How much of the house the system carries. The single largest factor, and the one most within your control.
- The condition and capacity of the existing service. A panel with room and a modern service is the cheap case; one needing replacement first is not.
- Where the unit can sit. Distance from the electrical service, the route the conductors have to take, and what that route runs through.
- The fuel arrangement the property can offer. What is already available at the site, and what it would take to get fuel to where the generator can stand.
- How the house is switched. Serving selected circuits and serving everything are different pieces of work.
- Site conditions. Access, ground, drainage, and how close the unit ends up to windows and living space.
- Permit and inspection requirements in your jurisdiction.
Two houses on the same street can land in genuinely different places on every one of those. That is why the estimate follows a site visit.
Does a Standby Generator Need a Transfer Switch?
Yes. A permanently installed standby generator requires a transfer switch, and it is not an optional extra to save on. The switch is what prevents the generator from ever feeding the utility side, which is the failure mode that endangers the crews working to restore your power — the same principle behind the mechanical interlock we fit to portable-generator installations.
Which type of switch suits your home depends on what the system is being asked to carry. That is decided during planning, alongside sizing, and it is part of the same conversation rather than a later surprise.
Common Questions
Do you install standby generators?
Yes. We install complete whole-house standby systems, including the generator unit itself, the transfer switch and the panel work that ties it into the house. We also install generator inlets and interlocks for portable units, so if you are still deciding between the two, describe the property and what you need to keep running and we will tell you honestly which one fits.
Do you install Generac generators?
Generac is the equipment we most often install on standby projects. If you have already settled on a particular unit, tell us what it is when you call and we will work to it.
Will a standby generator run my whole house?
That depends on how the system is sized, and it is a decision rather than a given. Some homes are practical to carry in full; others are better served by a system that runs the essential circuits properly. The load calculation settles it before anything is ordered.
Why Bring Power Line Electrical Contractors In for This
A standby installation is a large piece of residential electrical work with a safety component that reaches past your property line. A system that can energize the utility side is a hazard to line crews, and the equipment that prevents it only works if it is installed and set up correctly.
The work is carried out under Tennessee Electrical Contractor #82227 by a licensed, bonded and insured contractor, and it is inspected where the jurisdiction requires it. Our hours are 5:00 AM to 7:00 PM every day of the week.
Backup power is also rarely the only thing worth looking at after a bad storm season. Whole-home surge protection addresses the other half of the problem — the restoration surge that follows an outage — and if the outage left something behaving oddly, electrical troubleshooting is the place to start.
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