Demand Response: Getting Paid to Wait

Prices and rates in this article were checked October 2026.

Section 1: Why does the grid pay you to use less at peak? (Introduction)

Demand response pays you to use less power during grid peaks, usually by nudging a thermostat, water heater or battery for a few hours. The credit is real; read the event terms before enrolling, and know how to opt out of an event.

Serving that peak is expensive in a specific way. Utilities keep peaker plants that run a few dozen hours a year, and they size transformers and feeders for the maximum load. A kilowatt avoided at 6 p.m. on the hottest day is worth more to the system than a kilowatt saved at 2 a.m. in April, which is why demand response pays for timing rather than for total consumption. On a hot summer evening, air conditioners, water heaters, ovens, and EVs all draw at once, and the utility has to have enough generation and wire to serve that peak — even though it lasts a few hours a year. Demand response is the alternative: pay customers to use less during those hours instead of building for them.

The DOE’s Federal Energy Management Program defines demand response as a short-term, voluntary decrease in electricity consumption, triggered by grid reliability or high wholesale prices, in exchange for a payment. That definition is doing a lot of work. It is voluntary, it is short-term, and it is paid. A program that fails any of those tests is not demand response; it is a rate increase or a control scheme.

The category is larger than most people think. FERC’s 2025 assessment counted about 10.6 million customer accounts enrolled in retail demand response programs in 2023, up 2.4 percent from the year before. Most of that growth is residential, and most of it runs through devices that are already in the house: thermostats, water heaters, chargers, and batteries.

This guide covers how the programs work, what they pay, the comfort trade, and the hardware that qualifies. For the wider picture, start with the Automation hub.

Section 2: How does a residential demand response event work?

A demand response event is a signal. The utility or its aggregator sends a message to enrolled devices, the devices reduce their load for a defined window, and the customer is credited afterward.

Who runs the event

The utility may run the program directly or through an aggregator — a company that enrolls devices and sells the combined reduction into the utility’s program. The aggregator is why a single household can participate at all: one thermostat is too small to matter, but ten thousand thermostats are a power plant. Read who the counterparty is, because the payment terms and the support quality come from that company, not from the logo on the flyer.

The most common residential program. During an event, the utility raises the setpoint by a few degrees — the DOE’s residential guidance describes adjustments in the range of 1 to 3 degrees — or cycles the compressor. The air conditioner still runs; it just runs less. Pre-cooling before the event is the standard companion strategy: cool the house a little lower ahead of time, then let the setpoint drift during the event.

The water heater

A heat-pump or electric resistance water heater is a thermal battery. A controller can pause the heating element for an hour or two without the tank running cold, especially if the household showers at predictable times. Some utilities control the water heater directly; others use a controller supplied by the manufacturer or a third party.

The EV charger

EV charging is the most flexible large load in the house. A program can delay a charging session by an hour or reduce its amperage during the event. The car still charges; it charges later. This is the same logic as time-of-use scheduling, with the utility deciding the window instead of the tariff.

The battery

A home battery can discharge during an event, which is the cleanest form of demand response: no comfort change at all. The battery has to be enrolled and the reserve has to be set so the event does not empty the pack before the outage it was reserved for.

Opting out

Every legitimate program allows an override. The DOE’s guidance is explicit that participation is voluntary; a program that locks the thermostat for the duration of an event, with no manual escape, is a red flag. Read the override terms before enrolling, and check whether repeated overrides remove you from the program or reduce the payment.

Section 3: What does demand response pay, and what does it cost you?

The payment structures vary more than the technology.

• Bill credits per event. A small credit for each event, sometimes scaled by the load reduced.
• Seasonal or annual credits. A flat payment for enrolling and staying enrolled through the season.
• Device discounts. A subsidized or free thermostat, water heater controller, or charger in exchange for enrollment.
• Gift cards or sweepstakes entries. Common for thermostat programs, and usually the least valuable form.

There is no national number. A program in a constrained market may pay more than one in a surplus market, and the same utility may change the terms each year. The DOE’s guidance notes that utilities offer rebates for facilities that curtail on a small number of peak days, and the same logic applies to households: the payment is for the flexibility, not for the kilowatt-hours.

How the payment is calculated

Programs pay in one of three ways: a flat enrollment credit, a per-event credit, or a payment based on the estimated load reduction. The last is the most complex and the most variable, because the utility has to estimate what you would have used without the event. A household that is already efficient may see a smaller payment than a household with a big air conditioner, even if both are equally cooperative.

That is not a reason to skip the program; it is a reason to read the terms. A flat credit is predictable, a per-event credit rewards participation, and a measured reduction rewards load. For most households, the difference is a few dollars a month, and the comfort terms matter more than the payment formula.

The costs that are not on the bill

• Comfort. A 2-degree setback during a heat wave is noticeable. Pre-cooling helps, but a house with a single-zone system and a west-facing bedroom will feel it.
• Control. The utility can change your setpoint, within the program’s limits. That is the deal.
• Data. The utility or aggregator sees device status and event participation. Read the privacy terms; some programs share data with the device manufacturer as well.
• Wear. A battery or water heater that cycles more often ages a little faster. The effect is small for a few events a year, and larger for a program with dozens of events.

Section 4: How do you keep an event comfortable?

If the house is going to participate, set it up so the event is invisible.

1. Pre-cool before the window. Lower the setpoint an hour before the event, within the program’s rules. The thermal mass carries the house through the first part of the event.
2. Close the blinds and the doors. Solar gain and open doors are the two fastest ways to lose the pre-cooled air.
3. Use the ceiling fans. A fan makes the higher setpoint feel cooler, which is the cheapest comfort fix in the house.
4. Set a hard limit. Most apps let you cap the setback or the event duration. Use it.
5. Keep a manual override for medical need. A household with an infant, an older adult, or medical equipment should not rely on the program’s default limits.
6. Watch the first event. Treat the first one as a test: note the indoor temperature, the duration, and whether anyone noticed. Adjust the enrollment or the pre-cooling before the next heat wave.

The humidity problem

A thermostat setback in a humid climate does more than raise the temperature: the air conditioner also dehumidifies, and a system that runs less removes less moisture. A house can feel clammy at 76 degrees even if the thermometer says the setback is small. If the house has a dehumidifier or a variable-speed system, the program may be invisible; if it has a single-stage unit and a tight envelope, expect to notice.

The battery version

A battery program is the easiest to live with, because the house does not change temperature. The trade is the reserve: if the battery discharges for an event and the grid fails an hour later, the backup is smaller. Set the reserve for the outage you actually care about, and let the program use the rest.

Section 5: Which hardware can enroll in a program?

The utility publishes a list, and it is shorter than the smart home catalog.

The verification step

Enrollment usually asks for the device model, the account number, and permission to send control signals. The utility may verify the device online, and some programs require a firmware update or a specific app version before the first event. If the device drops off the network, the events stop and the credit may stop with it. A program is only as reliable as the Wi-Fi at the device.

A device being “smart” does not mean it is eligible. The manufacturer has to support the utility’s program, and the utility has to accept the model. Check both lists — the utility’s and the manufacturer’s — before buying hardware for a program.

The smart thermostat’s role

ENERGY STAR’s smart thermostat guidance describes the features that make a thermostat a good DR candidate: schedules, geofencing, remote control, and the ability to enter a low-power standby. The program adds a utility signal on top. If the thermostat is already installed, enrollment is usually a form and a few taps; if it is not, the program may subsidize the device.

Section 6: Should you enroll, and when should you skip it? (Conclusion)

1. Find the programs your utility offers. Search the utility’s site for demand response, smart thermostat, or connected water heater; the list changes annually.
2. Read the event terms. How many events, how long, what setback, what override, what payment.
3. Start with one device. A thermostat is the lowest-commitment entry; a battery is the most valuable but the biggest commitment.
4. Pre-cool and set limits. The first event should be boring.
5. Check the data terms. Know who sees the device data and how long they keep it.
6. Review the value after a season. Compare the credits with the comfort cost and the wear. If the payment is trivial, opt out.

A typical event looks like this: the utility forecasts a peak for 5 to 8 p.m., sends a notice the day before, and the thermostat pre-cools at 3 p.m., then lets the setpoint rise two degrees during the event. The house stays comfortable, the air conditioner runs less at the peak, and the credit appears on the next bill. The household notices nothing except a slightly warmer hour and a smaller peak charge.

Some households should skip demand response. A house with medical equipment, a household that is home all day in a hot climate, or a battery reserved for frequent outages may find the comfort and reliability costs higher than the credit. And a renter whose thermostat belongs to the landlord may not be able to enroll at all.

Demand response is the rare utility program that pays the customer for a behavior the smart home is already good at: waiting. The device does the work; the household decides how much control to give up.

Where to buy

Related reading

• Time-of-Use Rates: Automate the Cheap Hours — the price signal next to the event signal.
• Solar Self-Consumption, Explained — the battery that can answer an event.
• Smart Thermostat Audit — the device most programs enroll.
• Power Backup for the Home Office — the outage the battery reserve is for.

Sources

• DOE FEMP: Federal Demand Flexibility — demand response definition, voluntary curtailment and utility rebates, checked October 2026
• DOE: Demand Response in Residential Energy Code — smart thermostats, water heating and storage strategies, 1–3 degree setpoint adjustments and pre-cooling, checked October 2026
• FERC: 2025 Assessment of Demand Response and Advanced Metering — 10.6 million retail DR accounts in 2023, 2.4 percent growth, checked October 2026
• ENERGY STAR: Smart Thermostats — schedules, geofencing, remote control and standby features, checked October 2026