Solar Generation by Region

Solar generation across the ERCOT footprint, broken out by geographic region and rolled up system-wide, at hourly resolution.

Generation data ERCOT market

Query with the agent

Native record

target hour x forecast vintage x geography

hourly (forecast vintages) publication cadence

Evidence

Mixed evidence

Multiple evidence types kept distinct in the contract

Time basis

Point-in-time records

UTC · event_time

Overview

Alongside metered actuals, it carries the successive forecast vintages ERCOT publishes for each region, including the capacity-based high sustained limit (COP HSL) and the two physical solar production forecasts (STPPF and PVGRPP), so you can see what was expected versus what was delivered. This is the basis for tracking how solar output ramps through the day, how forecasts evolve as an operating hour approaches, and where regional solar buildout is concentrating across Texas. It comes from ERCOT report NP4-745-CD, Solar Power Production, Hourly Averaged Actual and Forecasted Values by Geographical Region.

Query contract

Choose one geography and one source_time vintage per event_time before comparing forecast and actual solar output. Use geography='system_wide' for an ERCOT-wide value.

Analysis rules

Do not sum regional rows together with geography='system_wide', and do not sum forecast vintages.

Interpretation

actual_mw, stppf_mw, and other solar fields measure generation output, not gross electricity demand. A solar forecast miss may change net load and dispatch needs, but it does not establish the cause or magnitude of an ERCOT gross-load forecast error.

Access

Query from your own tools

Use the guarded HTTP endpoint directly, or connect an MCP client and load the dataset contract with describe_data before calling query_data.

ERCOT MCP API reference

HTTP endpoint

POST /api/v1/datasets/ercot_solar_generation_geo/query

Schema11

Column

Type

event_timeDateTime64(6, 'UTC')

source_timeDateTime64(6, 'UTC')

geographyLowCardinality(String)

actual_mwNullable(Float64)

cop_hsl_mwNullable(Float64)

stppf_mwNullable(Float64)

pvgrpp_mwNullable(Float64)

dst_flagNullable(Bool)

emil_idNullable(String)

doc_idNullable(Int64)

ingested_atDateTime64(6, 'UTC')

Sample data

event_time	source_time	geography	actual_mw	dst_flag	emil_id	doc_id	ingested_at
2026-09-25 05:00:00.000000	2026-09-25 01:55:11.000000	system_wide	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 01:55:11.000000	south_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 01:55:11.000000	north_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 01:55:11.000000	far_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 01:55:11.000000	far_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 01:55:11.000000	center_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 01:55:11.000000	center_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 00:55:12.000000	system_wide	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 00:55:12.000000	south_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 00:55:12.000000	north_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 00:55:12.000000	far_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 00:55:12.000000	far_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 00:55:12.000000	center_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-25 00:55:12.000000	center_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 23:55:11.000000	system_wide	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 23:55:11.000000	south_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 23:55:11.000000	north_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 23:55:11.000000	far_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 23:55:11.000000	far_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 23:55:11.000000	center_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 23:55:11.000000	center_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 22:55:11.000000	system_wide	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 22:55:11.000000	south_east	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 22:55:11.000000	north_west	∅	false	∅	∅	2026-09-25 02:34:11.103950
2026-09-25 05:00:00.000000	2026-09-24 22:55:11.000000	far_west	∅	false	∅	∅	2026-09-25 02:34:11.103950

Coverage

100.0% complete0 gap days1,551 days with data

Show coverage history

Coverage: 100.0%Days with data: 1,551Gaps: 0

2026

2025

2024

2023

2022

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