Surge Protection and Backup Power in Austin
For storm season, freeze outages and the equipment you cannot afford to lose when the grid goes down.
Central Texas thunderstorms arrive hard in spring and early summer, and lightning nearby sends surges through the lines into homes. Winter brings its own risk: a hard freeze can strain the grid and leave whole neighborhoods without power for days, as many Austin households remember. Surge protection guards what is plugged in; a backup power hookup keeps the refrigerator, the heat and the internet running when the power is out.
Protection and Backup Options
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| Option | What it protects or powers | Best for | Things to know |
|---|---|---|---|
| Plug-in surge strips | The devices plugged into them | Computers, TVs, chargers | Wear out after big surges; replace them every few years |
| Panel-mounted whole-home surge protector | Every circuit in the panel, at the service | Any house, first layer of defense | Needs a good ground and a breaker space; installed at the panel |
| Generator inlet with interlock | The circuits you choose, from a portable generator | Homeowners with a portable generator | Generator stays outdoors; you switch circuits by hand at the panel |
| Transfer switch | A fixed set of circuits | Homes that want a set list ready to go | Manual or automatic; takes wall space beside the panel |
| Standby generator hookup | Part or all of the house, automatically | Medical equipment, long outages, home offices | Needs a fuel supply, a pad and a transfer switch; gas work goes to a plumber |
Choosing Which Circuits to Back Up
A portable generator cannot run the whole house. Start with what matters most in a long outage:
- The refrigerator and any freezer
- The furnace or heat pump blower, for heat in a freeze
- A well pump or sump pump, where the house has one
- The internet modem and router
- A few lights in the kitchen, the hall and the bathroom
- Medical equipment, first of all
Central air and electric ranges and water heaters draw far more than most portable generators make, so they usually stay off the list. A load calculation sets what the generator can carry.
Portable Generator Safety
- Run it outdoors only, well away from doors, windows and vents. Never in a garage, even with the door open.
- Carbon monoxide has no smell. Keep a working CO alarm on each floor.
- Never backfeed the house through an outlet with a double-ended cord. It can electrocute a lineworker on the street and start a fire inside.
- Use an inlet and an interlock or a transfer switch, or heavy cords run directly to each appliance.
What the Install Involves
A whole-home surge protector mounts at the panel on its own breaker, close to the ground and neutral bars so its leads stay short. A generator inlet goes on an outside wall near where the generator will sit, wired back to a generator breaker in the panel, with the interlock plate fitted to the panel cover. Both are worth adding while the panel is open for other work. If the panel is old, full or one of the problem brands, the panel may need attention first.
Questions About Surge and Backup
Interlock or transfer switch: what is the difference?
Both make sure the house cannot be fed by the generator and the utility at the same time. An interlock is a sliding plate on the main panel that only lets the generator breaker turn on when the main breaker is off; you then choose which circuits to run. A transfer switch is a separate device with its own set of circuits, either switched by hand or automatically for a standby generator. Interlocks take less room and fewer parts; transfer switches suit standby units and homes where the circuits to back up are settled.
Who connects the gas to a standby generator?
A plumber, or the gas company for the meter side. The electrical work covers the transfer switch, the wiring between the generator and the house, and the circuits it serves. The gas line to the generator is a separate trade with its own permit.
Do I still need surge strips with a whole-home protector?
Yes, for sensitive electronics. The panel-mounted protector takes the brunt of a surge from outside; plug-in strips catch what is left and surges made inside the house by motors and compressors. The two work as layers.