Published October 29, 2026 · Sources checked October 29, 2026 · By the HomeProFax editorial team
The transfer switch is the part of a standby system that decides where your home’s power comes from. On Generac’s product pages, checked October 29, 2026, 200-amp automatic transfer switches list from $549 to $1,499 for the hardware, depending on the type. Installation labor is extra and usually sits inside the overall installation price. Our 2026 guide puts total installation labor at $3,000–$5,000.
What a transfer switch does
During normal operation, the switch connects your home to the utility. When utility power fails, an automatic switch detects the outage, signals the generator to start, and moves your circuits over once the generator is ready. When utility power returns, it switches back and lets the generator cool down. Generac describes the transfer switch as “the piece of your backup power system that will automatically kick your generator into action after a loss of utility power,” and says installers mount it “next to your main breaker box” (Generac, accessed Oct 29, 2026).
The switch also keeps generator power from flowing back into utility lines. That is one reason transfer equipment for optional standby systems is covered by the National Electrical Code (NFPA 70) and inspected as part of the permit.
Transfer switch list prices (Generac, Oct 29, 2026)
These are the manufacturer’s “MSRP starting at” prices for 200-amp, single-phase automatic switches. Dealer prices can differ, and none of them include labor.
| Model | What it is | MSRP starting at |
|---|---|---|
| RBU200A3 | Service-entrance rated, upgradeable integrated meter. Generac calls it a low-cost option for builders to make a home “generator-ready.” | $549 |
| G0099300 | 200A automatic, non-service-entrance rated, NEMA 3R enclosure, 5-year limited warranty | $799 |
| G0099410 | 200A automatic, service-entrance rated, integrated meter socket | $1,419 |
| G0099390 | 200A automatic, service-entrance rated, integrated 20-space load center and whole-home surge protection | $1,499 |
Other brands sell comparable switches. This guide uses Generac only because its pages publish list prices we could verify. It is not a brand recommendation. For brand choice, see our sister site’s Kohler vs. Generac comparison.
Service-entrance rated vs. non-service-entrance rated
Non-service-entrance rated
These switches are installed after your existing main breaker. The main panel keeps its own service disconnect, and the switch sits between it and the circuits it feeds. In the list above, this is the $799 model.
Service-entrance rated
These switches include the service disconnect, so they can be installed where utility power enters the home, ahead of the panel. That lets one switch back up the entire service. Generac says its integrated-meter designs combine the meter socket and the switch in one enclosure, which “meets NEC® emergency disconnect requirements” and takes up less wall space (Generac G0099410). Generac also warns that you “must verify that this transfer switch is approved by your local Utility Service Provider” before choosing an integrated-meter model, because the utility’s meter goes into it.
Load-center and surge-protection versions
The $1,499 model combines the switch with a 20-space load center (expandable to 40 circuits with tandem breakers) and a factory-installed whole-home surge protector (Generac G0099390). It costs more as hardware but can replace a separate subpanel or surge device, so compare it against the total of those parts.
Whole-home switching and load management
A whole-home switch can only power everything at once if the generator is big enough, so many installs add load management. That means the system briefly sheds large loads such as central air when demand gets close to the generator’s capacity. Generac says its RBU200A3, once upgraded with the transfer mechanism, can manage “up to four individual HVAC loads” with no extra accessories (Generac RBU200A3). Our calculator prices a whole-home or load-management switch as an $800–$2,000 add-on (editorial estimate). Matching generator capacity to your loads is a sizing question, covered in detail by the generator sizing guide.
Manual switches and interlocks are a different setup
You will also see manual transfer switches and panel interlock kits, usually paired with portable generators. With these, someone has to be home to start the generator, plug it in, and move the switch or breakers by hand. They suit a different budget and a different level of convenience. They are not substitutes for the automatic switch a home standby generator is built to use. If you are deciding between a portable and a standby setup, our standby vs. portable generator guide compares the two. This page only prices the automatic switches used with standby units.
How the switch install fits the project timeline
Switch work usually happens on installation day, along with setting the unit and connecting fuel. The installer then simulates an outage to confirm the switch transfers on its own. Generac says the installation itself “usually takes hours,” but preparing for it “takes multiple weeks” because of dealer availability, site and gas line preparation, and permits (Generac). An integrated-meter switch adds a step, because the utility has to approve the equipment and coordinate the meter. Ask early so the utility’s schedule does not hold up an otherwise finished job.
What changes the installed price
- Switch type. Hardware list prices alone span $549 to $1,499 across the four Generac models above.
- Location of the meter and panel. A switch beside the meter and main panel needs shorter conductor runs. Generac notes that siting the generator close to the electric meter saves on installation cost (Generac).
- Utility involvement. An integrated-meter switch means the utility has to approve it and usually pull and reset the meter, which affects scheduling.
- Electrical labor. BLS reports a median electrician wage of $30.38 per hour in May 2025 (BLS, accessed Oct 29, 2026). Contractor billing rates include overhead and will be higher. BLS also notes that “most states require electricians to be licensed.”
- Permits and inspection. Fees are set locally. The switch is part of what the electrical inspector checks.
- Compatibility. Generac’s switch pages say they are designed for its generators with specific controllers (Evolution, Power Zone 200 or Power Zone 410). Your installer should confirm the switch matches the generator’s controller.
Questions to ask your installer
- Which exact transfer switch model is in the quote, and is it service-entrance rated?
- Will the switch back up the whole home or selected circuits? If selected, which ones?
- Is load management included, and which appliances will it control?
- Does my utility need to approve the switch or reset the meter, and who arranges that?
- Who pulls the electrical permit, and is the inspection fee included?
- What warranty covers the switch? Generac lists a 5-year limited warranty on the G0099300, G0099410 and G0099390.
How the switch fits the total budget
For a complete system, our 2026 guide puts a whole-house generator at $6,000–$25,000 installed, typically $10,000–$15,000. Generac says its systems average $8,000–$16,000 including the generator (Generac). The switch is one line in that total. See our installation cost breakdown for the other lines, the installation cost page for labor ranges, and the calculator to price your setup.
Frequently asked questions
How much does a generator transfer switch cost?
On Generac’s own product pages (checked Oct 29, 2026), 200-amp automatic transfer switches list from $549 to $1,499 for hardware, depending on whether the switch is service-entrance rated, includes a meter socket, or adds a load center and surge protection. Installation labor is extra and is usually part of the generator installation price.
What does service-entrance rated mean?
A service-entrance rated switch can be installed where utility power enters the home, ahead of the main panel, and it includes the service disconnect. Generac says its integrated-meter versions are designed to meet NEC emergency disconnect requirements. Your utility must approve integrated-meter switches before installation.
Do I need an automatic transfer switch for a standby generator?
Home standby generators are built to work with an automatic transfer switch. That switch senses an outage, starts the generator and moves your circuits over without anyone at home. Generac’s installation overview describes it as the part that “will automatically kick your generator into action.”
Can I install a transfer switch myself?
Transfer switch work connects to your home’s service and is governed by the National Electrical Code. BLS notes most states require electricians to be licensed, and nearly every jurisdiction requires a permit and inspection. Plan on a licensed electrician.
Sources
- Generac RBU200A3 upgradeable integrated-meter switch, MSRP page (accessed Oct 29, 2026)
- Generac G0099300, MSRP page (accessed Oct 29, 2026)
- Generac G0099410, MSRP page (accessed Oct 29, 2026)
- Generac G0099390, MSRP page (accessed Oct 29, 2026)
- Generac, “Backup Generator Installation” (accessed Oct 29, 2026)
- Generac 22–28 kW spec sheet, Rev. D 08/13/2026
- BLS Occupational Outlook Handbook: Electricians (accessed Oct 29, 2026)
- NFPA 70, National Electrical Code
Not sure what size you need? Use the generator sizing calculator · Choosing a brand? Read Kohler vs. Generac.
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Generator figures marked as from the 2026 cost guide (whole-house generator $6,000–$25,000 installed, typically $10,000–$15,000; unit $3,000–$6,000; installation $3,000–$5,000; 10–14 kW $6k–$10k, 18–26 kW $10k–$15k, 26+ kW $15k–$25k) come from the HomeGeneratorCost 2026 guide. Add-on ranges, load wattages and city factors are editorial estimates. Get written quotes from licensed installers.