ERCOT pays customers who can reduce load on demand. Here’s how the programs work and which ones actually fit Texas businesses.
Most businesses think of electricity as a one-way relationship: you consume, you pay. But ERCOT operates several programs that flip that dynamic — paying customers who can reduce or shift load when the grid needs it. For the right facility, demand response is one of the few line items on a business’s P&L that can convert operational flexibility into recurring revenue.
These programs aren’t a fit for every business. They require some operational discipline and some willingness to be interrupted. But for facilities with the right characteristics, they can offset a meaningful portion of annual energy spend.
The Main Programs
Emergency Response Service (ERS)
ERS is ERCOT’s primary demand-side reliability program. Participants commit to reducing load when called during emergency conditions. ERCOT procures ERS in standard contract terms — currently structured as four-month periods — through competitive RFPs. Participants are paid for being available, not just for actually curtailing.
ERS comes in several flavors: weather-sensitive and non-weather-sensitive, with different response time requirements (10-minute and 30-minute notification windows). The non-weather-sensitive products tend to be the easiest fit for businesses that can ramp down quickly without worrying about temperature drift.
Load Resource Participation in Ancillary Services
Larger commercial and industrial customers can participate directly in ERCOT’s ancillary services markets — Responsive Reserve Service (RRS), ERCOT Contingency Reserve Service (ECRS), and Non-Spinning Reserve. This is more operationally complex than ERS but can be more lucrative for facilities with the right profile and metering.
Retail Provider 4CP and Demand Charge Programs
Outside ERCOT’s direct programs, most large customers have an additional incentive to manage load: 4CP. ERCOT identifies the four highest-load 15-minute intervals, one in each summer month (June, July, August, September). Your facility’s average demand during those four intervals sets your transmission cost allocation for the entire next year. A few hours of careful load reduction in the summer can produce meaningful savings on transmission costs every month for the following 12 months.
Who Should Look at This
Demand response works best for businesses that meet several conditions:
- You consume meaningful load. Programs typically have minimum thresholds — often 100 kW or more for ERS, higher for ancillary services participation.
- You can reduce load on short notice. The faster you can curtail, the more program options open up. Facilities with backup generation, batteries, or interruptible processes have the most options.
- You have predictable, measurable load. ERCOT and your provider need to be able to verify your baseline and your reduction. Facilities with stable, well-instrumented load are easier to enroll.
- You can tolerate occasional interruption. Most years, programs are called rarely if at all. But “rarely” is not “never,” and the times you get called are by definition the worst times to have your operations interrupted. That tradeoff has to be worth it.
Common Examples
Industries that consistently make demand response work include cold storage and food processing (pre-cooling allows them to ride through curtailment), water and wastewater utilities (pumping can be shifted across hours), large irrigation operations, manufacturing operations with batch processes that can be paused, hospitals and large facilities with on-site generation that can island during events, and crypto mining and certain data center operations that are explicitly designed around interruptibility.
Where It Goes Wrong
Three patterns to avoid:
- Enrolling load you can’t actually shed. Penalties for non-performance during ERS deployments can erase a year of capacity payments quickly. Be conservative about what you commit.
- Not coordinating with your retail contract. Some retail contracts include provisions or restrictions around third-party demand response participation. Read before you sign up.
- Ignoring 4CP entirely. Even if formal demand response isn’t a fit, almost every large Texas customer should be doing some form of 4CP management. The transmission cost savings are real and the operational impact is minimal.
If your facility has any operational flexibility at all, you’re probably leaving money on the table. The first step is just measuring it honestly — most businesses underestimate how much load they could shed in a pinch.
Take the Next Step
Wondering if demand response or 4CP management could work for your facility? Amerigy Energy can assess your load profile against the available programs and identify what’s worth pursuing — and what isn’t. Reach out for a straightforward review.