What it does
A transfer switch is the traffic cop between three things: your utility power, your generator, and your home's electrical panel. Its job is simple and critical — connect your home to exactly one power source at a time, and never both. When utility power fails, it switches you to the generator. When utility power returns, it switches you back.
Why "never both" matters
If generator power and utility power connected at the same time, two bad things happen: the power sources fight each other (damaging both), and your generator sends electricity back out onto the utility lines — called backfeeding. Lineworkers repairing those lines expect them dead. Backfeeding can kill. The transfer switch's core safety job is making backfeeding physically impossible.
Automatic vs. manual
Automatic transfer switches (ATS) do everything themselves: sense the outage, start the generator, switch the load, switch back when power returns, shut the generator down. This is what comes with standby generator installations, and it's what makes the system truly hands-off.
Manual transfer switches require you to act: you start the generator yourself, walk to the switch, and flip it. They're far cheaper and they're the standard safe way to connect a portable generator to your home's circuits. The switch still provides the critical safety function — isolating your home from the grid — you just provide the labor.
Service-rated vs. sub-panel
A service-rated transfer switch sits between your meter and your main panel and can switch your entire electrical service — this is the whole-home setup. A sub-panel (or essential-circuits) switch feeds only a smaller panel of chosen circuits — cheaper, and the standard approach for budget backup systems. Which one you need depends on how much of your home you want to back up.
Can you add or upgrade one later?
Yes. If you have a generator but an undersized or aging transfer switch, we can replace it. If you have a portable generator and you're tired of extension cords, a manual transfer switch installation is one of the best upgrades you can make. See our transfer switch services or Send the form to talk through your setup.