Why Texas is the only state that needs an ERCOT-specific plan
Most of the United States is served by one of two large interconnections that span dozens of states and allow utilities to import electricity from far away when local generation fails. Texas runs its own grid, operated by the Electric Reliability Council of Texas, and that grid has limited ties to the rest of the country. When generation fails statewide, there is no neighbor to call. This is the single most important reason a Texas preparedness plan looks different from a plan written for Ohio or Georgia.
The practical consequence is that outages in Texas can last longer than the rolling four to six hours common in other regions, and they can occur in both seasonal extremes. Winter freezes can knock out natural gas generation and wind turbines simultaneously. Summer heat domes push air conditioning demand past the limits of the available megawatts. Both scenarios have happened in the past five years, and both required households to function without grid power for two to four days at a stretch.
Step one: tier your household loads before you buy anything
The single biggest mistake in suburban preparedness is buying equipment before defining what you actually need to power. Walk through your house with a notebook and place every device into one of three buckets.
- Critical loads: refrigerator, one HVAC zone or a window air conditioner, medical equipment like CPAP machines or insulin coolers, cell phones, and one light per occupied room
- Important loads: internet router, laptop chargers, microwave for short bursts, garage door opener
- Optional loads: dishwasher, clothes washer and dryer, electric oven, secondary televisions, hot tub
A typical critical load for a four-person home runs about 300 to 500 watts continuously, plus surge spikes when the refrigerator compressor cycles. That is far less than most homeowners assume, and it changes the equipment recommendation entirely. You do not need a whole-home generator. You need enough storage and inverter capacity to carry the critical bucket for 72 hours, plus a way to recharge that storage from solar or a small generator during daylight hours.
Step two: choose the right power architecture for a suburban lot
Three architectures dominate suburban grid-failure planning. Each has tradeoffs that matter more in Texas than in milder climates.
Architecture A is a portable lithium battery station in the 2 to 5 kilowatt-hour range, paired with 400 to 800 watts of folding solar panels. This setup costs roughly $1,500 to $3,500, weighs under 100 pounds, fits in a closet, and silently runs the critical load list for 18 to 36 hours per full charge. With solar recharging during the day, it can sustain critical loads indefinitely as long as the sun cooperates. It is the right choice for households with manageable critical loads and no medical-grade requirements.
Architecture B is a dual-fuel inverter generator in the 3 to 5 kilowatt range, running on either gasoline or propane. It costs roughly $1,000 to $2,500, but it requires fuel storage, produces exhaust that must vent outdoors, and creates noise that is unwelcome in dense neighborhoods. It carries heavier loads than Architecture A but cannot run indefinitely without continued fuel deliveries, which become scarce after 48 hours in a regional outage.
Architecture C is a permanently installed home battery system, such as a Tesla Powerwall, paired with rooftop solar. This is the most capable solution and the most expensive, typically $15,000 to $35,000 installed after federal tax credits. It is the right answer for households with medical dependencies, work-from-home obligations, or members who cannot tolerate temperature extremes. It is overkill for households whose primary goal is to keep the fridge cold and the phones charged.
Estimate Your Out-of-Pocket Risk
Your hurricane deductible is a percentage of your dwelling limit — not a flat dollar figure. Run the numbers for your home.
You would pay before coverage kicks in
$20,000
Out of pocket on a covered hurricane claim.
Step three: the water plan no Texas home should skip
Power planning gets all the attention, but water failure is what forced thousands of Texas households out of their homes during the 2021 freeze. Municipal water systems depend on grid power to maintain pressure. When the grid fails and pumping stations go offline, lines depressurize and contamination advisories follow even after pressure returns.
Store one gallon of water per person per day, with a minimum 14-day supply for any household that owns its home. For a family of four, that is 56 gallons. Use food-grade water storage containers rotated every six months, or commercial sealed water jugs with a multi-year shelf life. Add a backup filtration option such as a gravity-fed ceramic filter, which can render rainwater or pool water potable in a sustained outage. The combined cost of the storage plus the filter is under $250 and protects against the single most likely cause of household evacuation during a regional grid event.
Step four: the freeze playbook
In a winter event, the priority order is shelter temperature, water lines, food storage, and communication, in that order. Close off all but one room and concentrate occupants and any portable heat source in that single room. Open cabinet doors under sinks to allow warm air to reach plumbing. Drip both hot and cold taps at the lowest fixture in the house to keep water moving through the pipes. If indoor temperatures fall below 50 degrees Fahrenheit and the outage exceeds 24 hours, drain the pipes by shutting off the main valve and opening all fixtures, because frozen pipes are the single largest insurance claim category in a Texas freeze.
Step five: the heat dome playbook
Summer events require a different sequence. The priority order is heat stress prevention, food preservation, hydration, and communication. Move occupants to the lowest floor and the most-shaded interior room. Run one window air conditioner or a portable air conditioner off your battery or generator system rather than trying to cool the whole house. Wet a cotton sheet, hang it in a doorway, and run a small fan behind it to create evaporative cooling that drops perceived temperature by 8 to 12 degrees. Refrigerator and freezer doors stay shut except for one consolidated retrieval every six hours, which preserves cold for 36 to 48 hours without external power.
Step six: communication when towers are stressed
Cellular towers have backup batteries that last 4 to 8 hours under normal load, but they degrade faster when every household in a region is using mobile data simultaneously. Plan for degraded service. Designate one out-of-state contact who serves as the family clearinghouse. Each household member texts that single number when they reach safety, and the contact relays status. Text messages succeed in network conditions where voice calls fail because text uses a lower-bandwidth control channel.
What to do in the first 24 hours after power returns
When grid power restores, do not reconnect everything at once. Surges during restoration damage sensitive electronics. Wait 15 minutes for voltage to stabilize, then bring devices back online one at a time, starting with the refrigerator and HVAC. Inspect every plumbing fixture for leaks caused by freeze damage that only manifests after pressure returns. Photograph any spoiled food before discarding, because most homeowners policies reimburse food loss under the or Additional Coverages section up to a stated sublimit, often $500 to $1,000.
The plan you can build this weekend
A complete 72-hour plan for a four-person suburban Texas home, built from Architecture A, costs roughly $2,000 to $3,000 and fits inside a single hall closet. Doing nothing costs nothing today but exposes the household to the same outcome 246 Texans suffered in February 2021. The 72-hour window is the gap that almost always closes before federal mutual-aid arrives. Closing that gap is the entire job.