Houston's Power Outages Aren't Just a Hurricane Problem, Here's How Battery Backup Actually Handles Each Kin
Ask a Houston homeowner when they worry about losing power, and most people say hurricane season. That's fair, but it's only part of the picture. In the last two years alone, Houston has lost power at scale for three completely different reasons: a direct hurricane hit, a summer heat wave that strained the statewide grid itself, and a winter freeze that knocked out power in some neighborhoods even while the grid as a whole held up fine. A home battery backup system that comes with your solar panels has to handle all three, not just the one everybody talks about. Here's what actually happens to your power in each scenario, and how TerraOne's battery fits into a Houston home's plan for all of them.
What Actually Happens to Your Power During a Houston Outage
In Houston's deregulated electricity market, the company that bills you for electricity and the company that keeps the physical wires running are two different businesses. CenterPoint Energy is the transmission and delivery utility, the one responsible for the poles, lines, and local grid, regardless of which retail electricity provider is on your bill. When the power goes out at your house specifically, it's almost always a CenterPoint delivery issue, a downed line, a damaged transformer, ice on the wires, not a problem with your electricity plan.
That distinction matters because Texas actually has two separate layers of grid risk. One is statewide: whether ERCOT, the operator that manages the Texas grid, has enough power generation to meet demand across the whole state. The other is local: whether the physical lines running to your specific block are intact. A storm or a heat wave can strain the first. A single fallen tree limb can cause the second, even on a day when the statewide grid is perfectly fine. A battery at your home protects you either way, because it doesn't care why the grid went down, only that it did.
Hurricane Season: What Beryl Actually Showed Houston
Hurricane Beryl made landfall in July 2024 and left an estimated 2.2 to 2.6 million CenterPoint customers without power, with some households waiting more than a week to get their lights back. It wasn't a generation problem, ERCOT's statewide grid was fine. It was a distribution problem: trees and debris took down thousands of local lines across the Houston area faster than crews could repair them.
CenterPoint's response has been the Greater Houston Resiliency Initiative, a multi-phase plan that includes trimming vegetation along more than 2,000 miles of power lines, installing stronger poles, and a roughly $5 billion infrastructure investment planned through 2028, with a stated goal of avoiding more than 500,000 outages in a Beryl-scale storm going forward. That's a real, well-funded effort, but it's also a multi-year one, and it doesn't help a specific household during this year's storm season or next year's. A battery that switches on automatically the moment your power drops is the part of the plan that's already finished.
Summer Grid Strain: When the Grid Itself Is the Risk
The second kind of Houston outage risk isn't local at all, it's statewide. On July 22, 2026, ERCOT set a new all-time demand record of 91.1 gigawatts, about 6% above the previous record set in 2023, driven by extreme heat and rising electricity demand across Texas. On days like that, ERCOT can ask homes and businesses to conserve electricity during peak afternoon and evening hours, and in a worse scenario, it can mean rotating outages if supply gets too tight.
This is the one kind of Houston outage that has nothing to do with your neighborhood's power lines and everything to do with millions of Texans running air conditioning at the same time. A home battery that's already charged from the day's sunlight doesn't depend on the statewide margin between supply and demand at 6pm on the hottest day of the year.
Winter Freeze: The Lesson of Uri, and What Changed Since
Winter Storm Uri in February 2021 is still the reference point for how badly a Texas winter can go. Extreme cold knocked out roughly half the state's generating capacity at once, ERCOT ordered the largest manually controlled rolling blackout in U.S. history, and more than 4.5 million Texans lost power, some for as long as four days. The state passed new weatherization requirements for power plants afterward, and ERCOT has since inspected hundreds of generating facilities for winter readiness.
Winter Storm Fern, which hit North and Central Texas in January 2026, was the first real test of those reforms during a multi-day hard freeze, and the statewide grid held: ERCOT didn't call for conservation and didn't issue an emergency alert. But local outages still happened, including well over 100,000 customers in areas along the Texas-Louisiana line, from the same kind of ice-loaded lines and equipment failures that cause outages in any winter storm, in any state. The generation reforms since Uri appear to be working. They were never designed to prevent a downed line at your specific address, and they can't.
How TerraOne's Battery Backup Actually Works During an Outage
Every TerraOne installation includes a 40 kWh whole-home battery at no extra cost. It stores the solar energy your panels produce during the day, and it switches on automatically the moment CenterPoint's grid drops, no manual start, no fuel, no generator noise in the driveway. For most homes, it covers a full day of essential loads under normal use, and it recharges from your panels as soon as the sun is back out, so a multi-day outage with intermittent sunlight doesn't mean you're limited to a single charge.
In Texas specifically, TerraOne's battery includes a Virtual Power Plant component: up to 20% of its capacity can be called on to support grid stability during a statewide peak-demand event like the one ERCOT saw in July 2026, with the other 80% always reserved for your home. That trade-off is disclosed upfront, and it's part of why the model works at scale, your battery helps flatten the exact kind of demand spike that causes summer strain in the first place, while still keeping the majority of its capacity dedicated to keeping your own lights on.
What the battery isn't built for is an extended, multi-day outage with heavy continuous draw, several appliances running around the clock with little sun to recharge it. For that scenario, especially for a household with a medical necessity like an oxygen concentrator or other life-sustaining equipment, pairing the battery with a generator, or applying for Critical Care or Chronic Condition status through your utility for priority restoration, is a more reliable primary plan. That designation requires a physician's certification and doesn't guarantee uninterrupted power, but it does put the utility on notice. We'd rather say that plainly than oversell what a battery alone can guarantee in the worst case.
What To Do When the Power Goes Out in Houston
Check CenterPoint's Outage Tracker first. It shows whether the issue is a known local outage with an estimated restoration time, which tells you whether you're waiting on a repair crew or dealing with something inside your own home.
Confirm your battery switched over. With TerraOne, this happens automatically, but it's worth knowing which circuits in your home are on backup power so you're not surprised by what is and isn't running.
Prioritize what actually needs power. Refrigeration, medical equipment, and communication devices first. Central AC draws the most from the battery, so during an extended outage, cycling it rather than running it continuously stretches your charge further.
Know your medical backup plan before you need it, not during a storm. If anyone in the household depends on powered medical equipment, apply for Critical Care or Chronic Condition status with your utility ahead of time, not after the power is already out.
Have a generator plan for the worst case. A battery handles the outages that happen most often, a short local repair, a summer conservation event, a routine winter cold snap. For the rare multi-day, low-sun scenario, a generator as a secondary backup covers the gap.
How To Find Out If TerraOne Is Right for Your Home
The right backup plan depends on your home's actual usage, your roof, and what you're trying to protect against, a once-a-year hurricane risk looks different from a household running medical equipment every day. Our team can walk through what a 40 kWh battery would realistically cover for your specific home before you commit to anything.
