Before each winter, ERCOT publishes a Seasonal Assessment of Resource Adequacy comparing expected generation against expected demand, including extreme scenarios. It is a planning document, not a forecast of whether your power will stay on. For most households the practical takeaways are simple: watch for conservation appeals, know what your plan does during a price spike, and understand that a cold snap raises your bill whether or not the grid holds.
What the assessment actually is
ERCOT runs the grid for most of Texas. Ahead of each season it publishes an assessment setting expected available generation against expected peak demand, then models what happens under tougher conditions: unusually low wind, high unplanned outages, extreme sustained cold.
It is published on the ERCOT website and updated as the season approaches. Read the current one rather than a news summary of it, because headlines compress the extreme scenarios and the base case into one number.
What it tells you: whether planners expect a comfortable margin, a tight one, or a risk of emergency conditions under defined stress cases.
What it does not tell you: whether your street loses power. Most outages are local. A tree on a line, a failed transformer, ice on a distribution circuit. Those have nothing to do with statewide generation margin.
The two different things people mean by “will the grid hold”
| Concern | What actually drives it | Who handles it |
|---|---|---|
| Statewide emergency conditions | Generation against demand across ERCOT | ERCOT, through conservation appeals and emergency steps |
| My street losing power | Local equipment, ice, wind, a vehicle hitting a pole | Your utility: Oncor, CenterPoint, AEP Texas or TNMP |
The second is far more likely in any given winter, and it is not what the seasonal assessment is about.
What a conservation appeal means for you
When conditions tighten, ERCOT issues a public call to reduce usage during specific hours, usually the morning and evening peaks in winter.
It is voluntary. It is also worth doing, because the alternative to enough voluntary reduction is involuntary reduction.
Practical steps during an appeal, in rough order of effect:
- Turn the thermostat down a few degrees rather than off.
- Delay laundry, dishwashing and EV charging until the peak hours pass.
- Avoid using the oven during the named window if you have an alternative.
- Close blinds and curtains at night to keep heat in.
None of these are dramatic. The effect comes from many homes doing them at once.
The part that affects your bill, not your lights
This is the part most winter grid coverage skips.
During extreme cold, wholesale prices can rise sharply. What that does to your bill depends entirely on your plan type.
| Your plan | What a price spike does |
|---|---|
| Fixed rate, inside contract | Your energy rate does not move. Your bill still rises with usage |
| Month-to-month or variable | Your rate can move, and winter is the worst time to be exposed |
| Wholesale-indexed | Directly exposed to market prices, which is how households were hurt in past events |
| Time-of-use | Depends on whether the cold hours fall inside or outside your cheap window |
If you are on a variable or month-to-month rate heading into winter, that is the single thing worth fixing before a cold front, not after.
What protects you when things go wrong
Two protections are worth knowing before the season starts.
- Extreme weather and disconnection. Under PUCT Substantive Rule 25.483, during an extreme weather emergency in your county, your provider must not authorise disconnection for non-payment. The definition follows National Weather Service advisory criteria and is applied county by county.
- Deferred payment plans. For bills that come due during such an emergency, your provider must offer a deferred payment plan on request.
Neither clears a balance. Both buy time.
A sensible winter checklist
- Check what plan type you are on, and your contract end date.
- If you are on a variable or month-to-month rate, deal with that now.
- Register for outage alerts with your utility, in calm weather.
- Save your utility’s outage number in your phone, not your provider’s.
- If anyone in the home depends on powered medical equipment, ask about a critical care designation before the season, not during an event.
Steps one and two are the ones that change what winter costs. Aggregate Energy handles renewal timing for a pool of households, which removes the most common reason people are sitting on a variable rate in January. Check your ZIP code to see what applies in your area.
Frequently asked questions
1.Where can I read ERCOT’s winter assessment
On the ERCOT website, under seasonal resource adequacy. Read the current edition rather than a news summary.
2.Does a tight assessment mean my power will go out?
No. It describes statewide generation margin under modelled conditions. Most outages are local equipment problems instead.
3.What should I do during a conservation appeal?
Lower the thermostat a little, delay laundry, dishwashing and EV charging past the named hours, and avoid the oven if you can.
4.Can my power be shut off for non-payment in a freeze?
Not during an extreme weather emergency in your county, under PUCT Rule 25.483.
5.Does a fixed rate protect me from winter price spikes?
It protects your rate per unit while you are inside the contract. It does not cap your bill, because usage still rises.