Every Central Texas homeowner who has sat through a long outage ends up at the same question. Do you buy a portable generator and haul it out when the lights go, or do you install a standby unit that starts on its own?
Both are real answers. They suit different households, and the honest version of this comparison starts with a question about you rather than about the equipment: what are you willing to do at 2 a.m., in bad weather, to keep the power on?
The real difference is who does the work
A portable generator lives in the garage. When the power goes out you roll it outside, start it, connect it, refuel it every few hours, and shut it down when utility power comes back. You are part of the machine.
A standby generator sits outside on a pad, permanently wired into your electrical system through an automatic transfer switch and fed by natural gas or propane. It senses the outage, starts itself, carries the loads it was sized for, and hands the house back to the utility when power returns. Nobody has to be home.
Almost every other difference between the two follows from that one.
What an outage actually looks like here
Central Texas gets two kinds of outages and they don’t behave the same way.
Summer is grid strain. Heat pushes demand up, something fails, and the power is off while it is 100 degrees outside. These outages tend to be shorter, and a portable generator handles them reasonably well if you are home to run it.
Winter is the harder one. Ice brings lines down, crews can’t get to everything at once, and the outage can run for days. Refueling a portable in freezing rain, in the dark, several times a day, is genuinely hard work. Stations without power can’t pump gas either, so the fuel you have on hand when the storm arrives may be all the fuel you get.
If you are weighing the two, weigh them against the February outage, not the July one. The July version flatters the portable.
Fuel decides this more often than people expect
A standby generator runs on natural gas or propane. If your home is on a gas line, that is a fuel supply that doesn’t need your attention during a storm. Out in the Hill Country, plenty of homes aren’t on gas at all, and propane is the norm. A standby unit runs on propane without any trouble, but the tank has to be sized for the job and kept full, which is worth planning before the unit goes in rather than after.
A portable runs on gasoline. That means storing fuel safely, rotating it so it doesn’t go stale, and going out to get more in the middle of the event you bought it for.
Two safety issues worth stating plainly
Carbon monoxide is the first. A portable has to run well away from the house, never in a garage, breezeway, or against an open window, and that rule does not relax because it is raining.
Backfeeding is the second, and it is the one we see improvised most often. Connecting a portable to your house wiring through a dryer outlet or a homemade cord pushes power back onto the utility line outside, where line crews are working. It also puts your equipment at risk. If you want a portable to run circuits inside the house, the safe way is a manual transfer switch or a panel interlock, installed by a licensed electrician. That is real electrical work, and it is the one part of a portable setup we would tell you not to improvise.
A standby installation includes a transfer switch by design, and it is permitted and inspected like any other part of your electrical system.
How much either one can run
Both can be right-sized, and both can be undersized. Backup capacity is about the loads you want covered, not the square footage of the house. The air conditioner, the well pump, the range, and anything with a motor that has to start under load are the parts that drive the answer.
We walk through that math in our standby generator sizing guide. The same thinking applies to a portable, with a much smaller ceiling.
Where battery backup fits in
A home battery is the third option, and for some houses it is the better one. It is silent, it needs no fuel, and it carries the loads over the instant the grid drops, which matters if you work from home or have medical equipment. What it won’t do is run indefinitely. A generator runs as long as it is fed.
Homes that want both use a battery for the first hours and a generator for the long tail. If that is the direction you are leaning, our whole-home backup page covers how the two work together.
So which one
A portable is a sound choice if your outages are usually short, you are typically home, you are comfortable with the routine, and you have a licensed electrician install a proper transfer switch or interlock.
A standby is the better fit if you travel, if someone in the house depends on powered equipment, if you are on a well, or if you would rather not be the person outside in the ice at 2 a.m. It costs more up front and it asks almost nothing of you afterward.
There is no wrong answer here, only a mismatch between the equipment and the household. We install and service standby generators across Central Texas as a licensed electrical contractor, Generac certified and supporting Kohler, and we would rather size one correctly than sell you more machine than you need. You can see the full picture on our generators page.
Thinking about backup before winter? Request your estimate and we will walk your panel, your loads, and your fuel options with you. Or call us at (210) 394-3961.
