Portable generator hookups in Austin, TX
A portable generator only backs up your home safely when it feeds through a proper transfer method. We install the transfer switch, interlock kit and inlet box so your generator powers your circuits without ever backfeeding the grid.
A portable generator hookup is the permanent, code-compliant connection that lets you run a portable generator into your home's electrical system during an outage. The core of it is a transfer method that separates your home from the utility while the generator runs: either a manual transfer switch for a chosen set of circuits, or a breaker interlock kit that lets the generator back feed the whole panel one main at a time. We pair that with an exterior power inlet box and a correctly sized generator cord so you plug in outside and flip to generator power from inside, with no backfeeding and no guesswork.
This is the right call if:
- You own a portable generator and have been running extension cords through a window, and you want a safe, permanent hookup.
- You want to keep a well pump, refrigerator, heat or HVAC running when the grid goes down.
- You are on a rural or lake property served by Pedernales Electric Co-op where outages run longer.
- You want to decide in advance which circuits to back up and have them ready at the flip of a switch.
- Someone suggested backfeeding through a dryer or range cord and you want to know the right way instead.
- You are preparing for the next Texas ice storm or summer peak-demand outage before it happens.
Portable generator hookups options
Manual transfer switch for critical loads
A manual transfer switch mounts next to your panel and carries a fixed set of circuits you choose in advance, such as the well pump, furnace blower, fridge and a few outlets. During an outage you flip each circuit from utility to generator, and because the switch physically isolates those circuits, generator power can never travel back onto the utility line. This is the cleanest option when you want a defined critical-loads setup.
Breaker interlock kit on your panel
An interlock kit is a sliding metal plate that lets you turn on a dedicated generator breaker only after the main breaker is off, so the two can never be on at the same time. It lets a larger portable generator feed the whole panel, and you choose which breakers to leave on so you stay within the generator's capacity. It is a flexible, lower-cost path when your panel and its brand support a listed interlock.
Power inlet box and generator cord
The inlet box is the weather-rated outdoor receptacle you plug the generator into, wired back to the transfer switch or interlock breaker. We mount it where the cord reach, drip loop and generator placement all work for your home, and size the inlet, cord and breaker to the generator's output. No more running cords through a cracked window.
Dedicated circuits for the loads you want backed up
Sometimes the circuit you care about, like a well pump or a chest freezer in the garage, is buried on a shared circuit. We can add or reorganize dedicated circuits so the loads you want during an outage land where the transfer method can reach them. We size each one to its real draw.
Generator sizing to your real loads
The right hookup starts with what you actually need to run. We add up the running and starting watts of the loads you want, with attention to the surge a well pump or air handler pulls at startup, and tell you whether your generator fits or what size to look for. Oversizing wastes fuel and undersizing trips the generator.
What waiting can cost you
Backfeeding can kill a lineworker
Feeding a generator through a dryer or range cord with no transfer method, known as backfeeding, pushes power backward through your meter and onto the utility line. A lineworker who believes the line is dead can be electrocuted, and your generator can be destroyed when utility power returns. This is why a proper transfer switch or interlock is required and backfeeding is never acceptable.
An outage is the wrong time to improvise
Running cords through windows, overloading a single circuit or guessing at wiring during a storm leads to tripped generators, melted cords and fire risk. A permanent hookup installed ahead of time means you plug in, flip the switch, and your chosen circuits come to life.
Carbon monoxide from poor placement
A portable generator produces carbon monoxide and must run outdoors, well away from windows, doors and vents, never in a garage or against the house. Part of the install is working out safe placement and ventilation so exhaust stays outside.
Our process
- 01
Loads and generator review
We walk your home, ask what you need to keep running in an outage, and look at your generator and panel. We total the running and starting watts so the plan matches your generator's real capacity.
- 02
Transfer method and placement plan
We recommend a manual transfer switch or a breaker interlock based on your panel and your goals, and we pick a safe spot for the inlet box and the generator with ventilation and cord reach in mind.
- 03
Flat-rate price before work
Because the scope of the hookup is known once we have reviewed your panel and loads, you get a clear written price covering the transfer switch or interlock, the inlet box, the cord and any dedicated circuits, approved before we start.
- 04
Installation
We install the transfer method, mount and wire the exterior inlet box, add any dedicated circuits, and label exactly which circuits run on the generator so there is no confusion during an outage.
- 05
Permit and inspection
Where your City of Austin or county jurisdiction requires it, we pull the permit and meet the inspector so the work is documented and closed out properly.
- 06
Test and walkthrough
We run the system on your generator, confirm the transfer method isolates the utility correctly, and walk you through the exact steps so you can do it confidently on your own in the dark.
What is included
Every portable generator hookups job from Magnify Electric includes the same standards, start to finish.
- A load review so the hookup matches what you actually need to run and your generator's capacity.
- A listed manual transfer switch or breaker interlock kit appropriate for your panel.
- A weather-rated exterior power inlet box and a correctly sized generator cord.
- Clear labeling of every circuit that runs on the generator.
- Safe placement and ventilation guidance so exhaust stays well away from the home.
- Permit handling and inspection where your jurisdiction requires it.
- A test on your generator and a plain-language walkthrough of the steps.
Cost factors
We give you a flat-rate price after we see the job. These are the things that move that number up or down.
Transfer switch vs. interlock kit
A manual transfer switch for a set number of circuits is a different job and cost than a panel interlock kit. Which one fits depends on your panel brand, your goals and how many circuits you want to back up.
Panel location and cord run
How far the inlet box sits from the panel and where the generator can safely run affect the wiring and conduit. A long run or an exterior wall with obstructions adds to the scope.
Dedicated circuits needed
If a load you want backed up shares a circuit today, adding a dedicated circuit for it adds to the work. We tell you up front which loads need this.
We install generator hookups for rural and lake properties around Spicewood, Briarcliff, Marble Falls and Horseshoe Bay served by Pedernales Electric Co-op, where a long outage means a well pump and a fridge have to keep running, and for homes across Lakeway, Bee Cave and Austin that got caught without heat in past winter-freeze outages and want to be ready for the next one.
Rated by Central Texas homeowners
Real reviews from our Google Business Profile, in our customers' own words.
Chris and Caden did an amazing job installing my EV charger and helped assist me with other electrical questions I had around my house!! Very professional and kind. I highly recommend them!
Chris and Caden did a great job of installing a dedicated circuit and outlet for us. They were very thorough in checking out the existing circuit outlets and also patient with explaining everything before starting. I appreciated especially the quality of their work, their professionalism, and their willingness to throw in extra work where they saw fit at no charge. In short, I couldn’t be happier about the job they did.
Chris and Caden were awesome - they installed an entire new main panel and a new subpanel very effectively. We knew exactly what to expect at every step in the process, and now everything is up to code! If we need any additional electrical work, we will absolutely call Magnify Electric.
Trayvon is such a professional. He answers any and all questions. Does an amazing job in whatever is needed, and you’d never even know he had been here as he tidies up impeccably. He is our family’s electrician. I’d give 10 stars if able!
Felt lucky to have found Magnify Electric. Christian fixed the issue we were having with our hardwired smoke alarms, installed a whole-house surge protector, and fixed a longstanding light switch issue. He did everything with excellence and efficiency. He did a great job of communicating throughout the process. Thanks so much!
Showed as scheduled. Had to coordinate with PEC and everything went very smoothly. Christian was very professional and completed the job quickly. Very satisfied with the results. I would recommend them to do any electrical work in my home.
Portable generator hookups questions, answered
Can't I just back feed my generator through the dryer outlet?
No. Backfeeding through a dryer or range cord is dangerous and against code. With no transfer method, generator power travels backward through your meter onto the utility line, where it can electrocute a lineworker who thinks the line is dead, and it can destroy your generator when power comes back. The safe and legal way is a transfer switch or a breaker interlock, which physically prevents the generator and the grid from being connected at the same time.
What's the difference between a transfer switch and an interlock kit?
A manual transfer switch carries a fixed set of circuits you choose in advance and you flip each one over during an outage. An interlock kit is a plate on your panel that lets a generator breaker turn on only when the main is off, so you can feed the whole panel and pick which breakers to run. A transfer switch is simple and defined; an interlock is more flexible and often lower cost. We recommend the one that fits your panel and how you want to use the generator.
What can I run on a portable generator during an outage?
It depends on your generator's wattage and the starting surge of your equipment. Most homeowners prioritize a well pump, the refrigerator or freezer, the furnace blower or a heat source, and a few lights and outlets. A well pump and an air handler pull a large surge at startup, so we size the hookup and the backed-up loads to what your generator can actually start and hold.
What size portable generator do I need?
We total the running watts of the loads you want plus the surge watts of the biggest motor that starts, usually the well pump or HVAC blower, and that number guides the size. Many Hill Country homes with a well land in a range that needs a mid to large portable unit. We give you a straight answer on whether your current generator fits or what to shop for.
Will this work for my well pump on a PEC rural property?
Yes, and a well pump is one of the most common reasons lake and rural homeowners on Pedernales Electric Co-op want a hookup, since an outage with no water is a real problem. The key is sizing: a well pump draws a heavy surge when it kicks on, so the generator and the transfer method have to handle that start. We confirm your pump's requirements before we quote.
Where does the generator have to sit when it's running?
Outdoors, on a dry level spot, well away from windows, doors and vents, and never in a garage or carport or up against the house. A portable generator produces carbon monoxide, which is deadly indoors. Part of our install is choosing the inlet box location so a safe generator spot and the cord run both work for your home.
Do I need a permit for a generator hookup?
Often yes. Adding a transfer switch, interlock or inlet box is electrical work that many jurisdictions require a permit and inspection for, whether you are in the City of Austin or a county office. We handle the permit and meet the inspector where it is required so the work is documented and done right.
How much does a portable generator hookup cost?
It depends on whether you choose a manual transfer switch or an interlock kit, how far the inlet box is from the panel, and whether any loads need new dedicated circuits. We give you a flat-rate price after reviewing your panel, your generator and the loads you want to back up, and you approve it before we start.
Licensed, local and upfront
Upfront
Flat-rate repair pricing you approve
Licensed
TECL 29321, Master 269417
Local
Family-owned in Spicewood since 2012
Backed
Work guaranteed and done to code
Serving Austin and the Hill Country
We are based in Spicewood and cover the lake communities, the Hill Country and greater Austin. Find your town below for local details.
Headquarters: 22503 State Highway 71 W, Spicewood, TX 78669
Related services
Panel upgrades and repairs
An interlock kit needs a sound, compatible panel, which is where we check first.
Learn more →Whole-home surge protection
Storm outages come with surges, so many homeowners add protection at the same time.
Learn more →Outlet and receptacle service
We can add dedicated circuits and outlets for the loads you want to back up.
Learn more →Troubleshooting and repair
If a circuit trips the generator, we trace the real cause rather than guess.
Learn more →Ready for portable generator hookups?
Tell us what you need and we will get back to you within one business day. For anything urgent, call us now and talk to a real person.