Fuel Mix (5-minute)

Realized generation in megawatts across ERCOT's eight headline fuel categories (such as gas, wind, solar, nuclear, coal, and hydro), reported at five-minute intervals for the Texas grid.

Generation data

Download data

Native record

ERCOT system x 5-minute interval

5-minute publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Point-in-time records

UTC · event_time

Overview

This is the live operational view of where power is actually coming from at any moment, the faster companion to the settlement-grade Fuel Mix Report. It lets operators, traders, and researchers watch the resource mix shift in near real time, track renewable ramps and gas response intraday, and see how generation composition moves with load and prices. The official upstream source is ERCOT report NP6-788-CD (Fuel Mix Report). The SQL agent queries this through the unified `ercot_fuel_mix` view (quality='live') rather than this table directly.

Query contract

Select one exact event_time snapshot. Each fuel column is the ERCOT-wide net output for that interval.

Analysis rules

For a current fuel mix, use every fuel column from the same latest event_time; do not combine values from different snapshots.
Calculate shares against the algebraic sum of all returned fuel columns at that snapshot.

Interpretation

storage_mw is net fleet output: positive is discharging into the grid and negative is charging from the grid.
A single snapshot supports the observed mix and storage direction, but not a ramp, daily pattern, cause, or forecast narrative.

Schema10

Column

Type

event_timeDateTime64(6, 'UTC')

coal_mwNullable(Float64)

hydro_mwNullable(Float64)

nuclear_mwNullable(Float64)

storage_mwNullable(Float64)

solar_mwNullable(Float64)

wind_mwNullable(Float64)

gas_mwNullable(Float64)

other_mwNullable(Float64)

ingested_atDateTime64(6, 'UTC')

Sample data

event_time	coal_mw	hydro_mw	nuclear_mw	storage_mw	solar_mw	wind_mw	gas_mw	other_mw	ingested_at
2026-09-25 02:15:00.000000	8549.931640625	60.0712585449219	4968.07861328125	4971.20166015625	201.364700317383	13376.7998046875	41307.02429199218	85.3000030517578	2026-09-25 02:20:12.378856
2026-09-25 02:10:00.000000	8544.431640625	59.9129676818848	4968.353515625	5131.33837890625	201.370162963867	13285.294921875	41307.50038146974	85.3000030517578	2026-09-25 02:20:12.378856
2026-09-25 02:10:00.000000	8544.431640625	59.9129676818848	4968.353515625	5131.33837890625	201.370162963867	13285.294921875	41307.50038146974	85.3000030517578	2026-09-25 02:15:12.782561
2026-09-25 02:05:00.000000	8544.5830078125	57.6222534179688	4967.1884765625	5269.80224609375	201.299163818359	13153.31640625	41333.18098449707	85.9000015258789	2026-09-25 02:20:12.378856
2026-09-25 02:05:00.000000	8544.5830078125	57.6222534179688	4967.1884765625	5269.80224609375	201.299163818359	13153.31640625	41333.18098449707	85.9000015258789	2026-09-25 02:15:12.782561
2026-09-25 02:05:00.000000	8544.5830078125	57.6222534179688	4967.1884765625	5269.80224609375	201.299163818359	13153.31640625	41333.18098449707	85.9000015258789	2026-09-25 02:10:12.338843
2026-09-25 02:00:00.000000	8577.701171875	105.649803161621	4967.501953125	5409.2998046875	201.324096679688	13148.05078125	41347.38935852051	86.3000030517578	2026-09-25 02:20:12.378856
2026-09-25 02:00:00.000000	8577.701171875	105.649803161621	4967.501953125	5409.2998046875	201.324096679688	13148.05078125	41347.38935852051	86.3000030517578	2026-09-25 02:15:12.782561
2026-09-25 02:00:00.000000	8577.701171875	105.649803161621	4967.501953125	5409.2998046875	201.324096679688	13148.05078125	41347.38935852051	86.3000030517578	2026-09-25 02:10:12.338843
2026-09-25 02:00:00.000000	8577.701171875	105.649803161621	4967.501953125	5409.2998046875	201.324096679688	13148.05078125	41347.38935852051	86.3000030517578	2026-09-25 02:05:11.334411
2026-09-25 01:55:00.000000	8568.0615234375	145.504486083984	4968.2734375	5641.220703125	201.365463256836	13092.4111328125	41375.507690429695	89.1999969482422	2026-09-25 02:20:12.378856
2026-09-25 01:55:00.000000	8568.0615234375	145.504486083984	4968.2734375	5641.220703125	201.365463256836	13092.4111328125	41375.507690429695	89.1999969482422	2026-09-25 02:15:12.782561
2026-09-25 01:55:00.000000	8568.0615234375	145.504486083984	4968.2734375	5641.220703125	201.365463256836	13092.4111328125	41375.507690429695	89.1999969482422	2026-09-25 02:10:12.338843
2026-09-25 01:55:00.000000	8568.0615234375	145.504486083984	4968.2734375	5641.220703125	201.365463256836	13092.4111328125	41375.507690429695	89.1999969482422	2026-09-25 02:05:11.334411
2026-09-25 01:50:00.000000	8590.8623046875	145.732238769531	4967.4970703125	6019.33447265625	201.285766601563	12971.7412109375	41391.2480773926	91.4000015258789	2026-09-25 02:20:12.378856
2026-09-25 01:50:00.000000	8590.8623046875	145.732238769531	4967.4970703125	6019.33447265625	201.285766601563	12971.7412109375	41391.2480773926	91.4000015258789	2026-09-25 02:15:12.782561
2026-09-25 01:50:00.000000	8590.8623046875	145.732238769531	4967.4970703125	6019.33447265625	201.285766601563	12971.7412109375	41391.2480773926	91.4000015258789	2026-09-25 02:10:12.338843
2026-09-25 01:50:00.000000	8590.8623046875	145.732238769531	4967.4970703125	6019.33447265625	201.285766601563	12971.7412109375	41391.2480773926	91.4000015258789	2026-09-25 02:05:11.334411
2026-09-25 01:45:00.000000	8611.5615234375	147.842742919922	4968.0263671875	6340.79150390625	201.531478881836	12876.7294921875	41402.681838989265	94	2026-09-25 02:20:12.378856
2026-09-25 01:45:00.000000	8611.5615234375	147.842742919922	4968.0263671875	6340.79150390625	201.531478881836	12876.7294921875	41402.681838989265	94	2026-09-25 02:15:12.782561
2026-09-25 01:45:00.000000	8611.5615234375	147.842742919922	4968.0263671875	6340.79150390625	201.531478881836	12876.7294921875	41402.681838989265	94	2026-09-25 02:10:12.338843
2026-09-25 01:45:00.000000	8611.5615234375	147.842742919922	4968.0263671875	6340.79150390625	201.531478881836	12876.7294921875	41402.681838989265	94	2026-09-25 02:05:11.334411
2026-09-25 01:40:00.000000	8614.44921875	146.668228149414	4966.8291015625	6669.2763671875	201.450378417969	12678.7998046875	41385.0177154541	96.4000015258789	2026-09-25 02:20:12.378856
2026-09-25 01:40:00.000000	8614.44921875	146.668228149414	4966.8291015625	6669.2763671875	201.450378417969	12678.7998046875	41385.0177154541	96.4000015258789	2026-09-25 02:15:12.782561
2026-09-25 01:40:00.000000	8614.44921875	146.668228149414	4966.8291015625	6669.2763671875	201.450378417969	12678.7998046875	41385.0177154541	96.4000015258789	2026-09-25 02:10:12.338843

Coverage

100.0% complete0 gap days109 days with data

Show coverage history

Coverage: 100.0%Days with data: 109Gaps: 0

2026

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Dataset	Description
ERCOT Generation Mix by FuelERCOT · 5-minute (live) and 15-minute (settled)	What is physically generating in ERCOT, in megawatts by fuel, one row per interval. 691,109 intervals, 2007-01 to now. Columns: coal_mw, gas_mw, nuclear_mw, hydro_mw, wind_mw, solar_mw, storage_mw, other_mw. Wide rather than long: a whole interval's mix is one row, so shares are computed across columns in that row and the timestamp does not repeat once per fuel. "Which fuel is largest" is greatest() across the columns, or simply reading the row.
Fuel Mix (Unified)ERCOT · 5-minute (live only, pending settled backfill)	Realized ERCOT generation in megawatts by fuel type (coal, hydro, nuclear, storage, solar, wind, gas, other), one row per (event_time, fuel_type, quality). Long-format unification of the live 5-minute feed and the settlement-grade Fuel Mix Report — but quality='settled' is TEMPORARILY DISABLED: ercot.fuel_mix_report's gen_mw was found to be ~4x too low (ERCOT publishes MWh delivered per 15-min interval, not average MW, and the writer didn't convert). The write-path bug is fixed, but existing report rows are still wrong pending a full historical backfill, so this view currently emits quality='live' only (the 5-minute feed, which reads a separate MW-native source and is correct). The settled branch will return once the backfill is verified. Always filter by event_time; this is a view, and an unbounded scan is expensive. This is the table the SQL agent actually queries; ercot_fuel_mix_report and ercot_fuel_mix_5min remain in the public catalog as the underlying raw sources.
Fuel Mix ReportERCOT · 15-minute (settlement)	ERCOT's Fuel Mix Report (IntGenByFuel) gives actual electricity generation across the Texas grid broken out by fuel type, for every 15-minute settlement interval. Each interval lists output for categories such as gas, coal, nuclear, wind, solar, hydro, and storage, with values first published as initial readings and later restated as settlement-quality finals. It shows what physically ran on the system and in what proportion, letting operators, traders, and researchers track the real-time generation mix, gauge renewable penetration against load, and study how the fuel stack shifts hour to hour and season to season. The SQL agent queries this through the unified `ercot_fuel_mix` view (quality='settled') rather than this table directly.
Hourly RUC Committed CapacityERCOT · hourly	How much generation capacity ERCOT's Reliability Unit Commitment (RUC) process has effectively forced online, hour by hour. For each hour of the RUC study period, ERCOT publishes the sum of the High Sustained Limits (HSLs) of resources that are online in the most recent SCED execution but were indicated as offline in their Current Operating Plan (COP) — i.e. capacity RUC committed beyond what the market self-committed. This is a direct hourly proxy for RUC-committed MW, the signal behind reliability commitments on tight days. From 2021 the megawatts are broken out by weather zone (South, North, West, Houston) with committed_capacity_mw as the system total; earlier vintages (back to October 2018) carry the system-wide total only, since ERCOT did not publish the zonal split before then. It is bitemporal — every row carries both the study delivery hour (event_time) and the publishing vintage (source_time), so successive hourly RUC runs accumulate as distinct rows. The official source is ERCOT report NP3-764-CD, Hourly RUC Online In SCED Offline In COP.