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ERCOT Day-Ahead Total Ancillary Services Sold

Hourly quantities of each ancillary service ERCOT procured in its Day-Ahead Market, from report NP4-532-CD, updated with each day-ahead run.

Published by ERCOT report NP4-532-CD (opens in a new tab)Cadence: hourly (DAM)Ancillary ServicesERCOT market
Ask the agentOpen in Data (opens in a new tab)

About this data

Each row is the total quantity of one ancillary service product that ERCOT procured in the Day-Ahead Market for one delivery hour: Regulation Up, Regulation Down, Responsive Reserve, ECRS or Non-Spinning Reserve. It shows how much capability ERCOT set aside for balancing and contingencies rather than for energy. Read it with the clearing prices to see how reserve requirements shift hour to hour and how much the market commits to reliability.

What people use it for

  • Track how much reserve ERCOT buys by hour and product
  • Pair purchased volumes with clearing prices
  • Compare reserve requirements across seasons

TermsAncillary servicesDay-ahead vs. real-time markets

Where to use it

In Ask the Grid

Ask about it, see it live

The grid agent reads it to answer questions about ERCOT. Every answer names the data it read and links back here.

ERCOT market

In ATG Data

Build with the full table

Schema, full history, coverage and query rules live in Data, where you can browse every row, run SQL and connect it to your own code.

Plans and access

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Questions

Which data provider has ERCOT Day-Ahead Total Ancillary Services Sold data?
Ask the Grid has it, from ERCOT report NP4-532-CD. You can browse every row in Ask the Grid Data, query it with SQL or the Ask the Grid API, reach it from an AI assistant over MCP, or ask the grid agent about it in plain English.
Where does ERCOT Day-Ahead Total Ancillary Services Sold come from?
It comes from ERCOT report NP4-532-CD. This page links to the original publication, so any value can be checked against it.
How do I download or query ERCOT Day-Ahead Total Ancillary Services Sold?
Open the ercot.dam_total_as_sold table in Ask the Grid Data to browse every row and run SQL against it, call it from code through the Ask the Grid API, or connect an MCP client. Full history can be delivered on a schedule to Snowflake, Databricks or your own storage.
Can I ask questions about ERCOT Day-Ahead Total Ancillary Services Sold in plain English?
Yes. The grid agent reads this data when a question needs it, for example "how much ecrs did ercot buy in the day-ahead market for tomorrow", and every answer names the dataset it read.