Generation Fuel Mix

SPP system generation by fuel, published every five minutes.

One row per: event_time; 5-minute cadence
Evidence: Observed market data; Published observations from the named source
Time basis: Point-in-time records; UTC · event_time

Overview

Unlike markets that publish one row per fuel, SPP publishes one row per interval with a column per fuel: wind, solar, natural gas, coal, nuclear, hydro, diesel, waste, and other, alongside total load and wind's percentage share. Wind is the defining series in this market and regularly supplies a larger share of demand than in any other US market. Solar can read slightly negative overnight, which reflects real station-service draw rather than a data error.

Query contract: Preserve one canonical row per (event_time) before aggregating.
Analysis rules: Group only after preserving the declared grain: event_time.

Access

Download: Query it in SQL, download it, or read it with an API key. Download data
Full history: Delivered to Snowflake, Databricks or your own storage on a schedule by Data services.
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Schema

13 columns

Column	Type
`event_time`	`DateTime64(6, 'UTC')`
`wind_mw`	`Nullable(Float64)`
`solar_mw`	`Nullable(Float64)`
`natural_gas_mw`	`Nullable(Float64)`
`coal_mw`	`Nullable(Float64)`
`nuclear_mw`	`Nullable(Float64)`
`hydro_mw`	`Nullable(Float64)`
`diesel_mw`	`Nullable(Float64)`
`other_mw`	`Nullable(Float64)`
`waste_mw`	`Nullable(Float64)`
`total_load_mw`	`Nullable(Float64)`
`wind_pct`	`Nullable(Float64)`
`ingested_at`	`DateTime64(6, 'UTC')`

Sample data

event_time	wind_mw	solar_mw	natural_gas_mw	coal_mw	nuclear_mw	hydro_mw	diesel_mw	other_mw	waste_mw	total_load_mw	wind_pct	ingested_at
2026-11-04 21:35:00.000000	9917.7	2642.9	11392.099999999999	5398.3	1220.6	838.2	6.6	25.1	6.6	32037.53	31	2026-11-04 21:39:21.043290
2026-11-04 21:30:00.000000	9915.9	2655	11427.699999999999	5407.299999999999	1220.6	832.0999999999999	6.6	25	6.7	32037.57	31	2026-11-04 21:34:22.956579
2026-11-04 21:25:00.000000	9976.4	2690.9	11393.4	5387.4	1220.6	832.9000000000001	6.6	25.1	6.7	31939.09	31.2	2026-11-04 21:29:21.047008
2026-11-04 21:20:00.000000	9951.6	2715.5	11380.400000000001	5409.6	1220.6	835.4000000000001	6.6	25.1	6.7	31975.8	31.1	2026-11-04 21:24:21.308586
2026-11-04 21:15:00.000000	9903.7	2711	11517	5423.299999999999	1220.6	832.5	6.6	25.1	6.6	31995.78	31	2026-11-04 21:19:22.671121
2026-11-04 21:10:00.000000	9896.8	2722.3	11502.7	5396.8	1220.6	834.9	6.6	25.1	6.6	31931.21	31	2026-11-04 21:14:29.081639
2026-11-04 21:05:00.000000	9835.3	2740.7	11525.3	5445.5	1222.3	833.3	6.6	31.1	6.8	31992.25	30.7	2026-11-04 21:09:21.519109
2026-11-04 21:00:00.000000	9882.5	2760.8	11585	5480.799999999999	1220.6	844.1999999999999	6.6	33	6.7	31934.25	30.9	2026-11-04 21:04:23.769432
2026-11-04 20:55:00.000000	9929.7	2721	11567.599999999999	5491.4	1220.6	850.1999999999999	6.6	35	6.6	31775.72	31.2	2026-11-04 20:59:21.203772
2026-11-04 20:50:00.000000	9983.4	2721.2	11488.1	5456.1	1220.6	844.5	6.6	25.2	6.7	31813.11	31.4	2026-11-04 20:54:21.470512
2026-11-04 20:45:00.000000	10011.1	2714.7	11460.400000000001	5428.6	1220.6	846.8	6.6	25.1	6.6	31819.89	31.5	2026-11-04 20:49:21.613975
2026-11-04 20:40:00.000000	10017	2719.6	11432.099999999999	5451.2	1219	843	6.6	25.1	6.6	31832.96	31.5	2026-11-04 20:44:20.440741
2026-11-04 20:35:00.000000	10030	2705.9	11434.599999999999	5454.9	1220.6	846.6	6.6	25.2	6.6	31984.17	31.4	2026-11-04 20:39:21.871332
2026-11-04 20:30:00.000000	9996.4	2704.1	11407.4	5471.5	1219	840.6	6.6	25.1	6.7	31849.71	31.4	2026-11-04 20:34:23.674997
2026-11-04 20:25:00.000000	10004.7	2689.7	11371.1	5456.2	1220.6	843.0999999999999	6.6	25.1	6.7	32058.54	31.2	2026-11-04 20:29:21.060817
2026-11-04 20:20:00.000000	10049.9	2681	11458.5	5463.5	1220.6	840.1999999999999	6.6	25.1	6.7	32113.76	31.3	2026-11-04 20:24:24.137128
2026-11-04 20:15:00.000000	10058.1	2684.5	11341.3	5465.8	1220.6	847.3	6.6	25.1	6.5	32062.32	31.4	2026-11-04 20:19:22.207475
2026-11-04 20:10:00.000000	10111	2669.6	11281.099999999999	5471.2	1219	847.0999999999999	6.6	25.1	6.6	32077.58	31.5	2026-11-04 20:14:24.011185
2026-11-04 20:05:00.000000	10083.1	2657.3	11372.300000000001	5435.4	1220.6	847.1999999999999	6.6	25.2	6.6	31874.08	31.6	2026-11-04 20:09:22.468914
2026-11-04 20:00:00.000000	10074	2653.7	11119.4	5365.3	1220.6	953.1999999999999	6.6	25.1	6.6	32024.28	31.5	2026-11-04 20:04:24.051932
2026-11-04 19:55:00.000000	10085.4	2644.3	11045.2	5346.6	1219	952.4	6.6	25.2	6.6	32077.56	31.4	2026-11-04 19:59:20.478701
2026-11-04 19:50:00.000000	10040.8	2613.8	11148	5343.9	1220.6	948.4	6.6	25.1	6.5	32085.74	31.3	2026-11-04 19:54:22.724691
2026-11-04 19:45:00.000000	9942.8	2612.9	11198.099999999999	5325.799999999999	1220.6	942.0999999999999	6.6	25	6.7	32096.47	31	2026-11-04 19:49:21.579802
2026-11-04 19:40:00.000000	9863.6	2620.8	11280.599999999999	5352.200000000001	1220.6	920.1999999999999	6.6	25.1	6.7	32056.6	30.8	2026-11-04 19:44:23.372105
2026-11-04 19:35:00.000000	9944.3	2607.6	11212.6	5317.5	1220.6	951.6999999999999	6.6	25.1	6.7	32058.13	31	2026-11-04 19:39:22.836687

Coverage

Complete: 100.0%
Gap days: 0
Days with data: 5,787

Show coverage history

Coverage: 100.0%Days with data: 5,787Gaps: 0

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Related data

Related generation data
Dataset	Description
All hourly reserve-zone forecast vintagesSPP · day publication	SPP's All hourly reserve-zone forecast vintages. Each row preserves a publisher record, workbook row, or report document with its source member and row index. Source timestamps, units, geographic scope, and revision qualifiers are retained in record_json; event_time is collection time; completed_at is when the entire document became available.
Completed-year curtailment archiveSPP · year publication	SPP's Completed-year curtailment archive. Each row preserves a publisher record, workbook row, or report document with its source member and row index. Source timestamps, units, geographic scope, and revision qualifiers are retained in record_json; event_time is collection time; completed_at is when the entire document became available.
Daily VER curtailments, preserving BAASPP · day publication	SPP's Daily VER curtailments, preserving BAA. Each row preserves a publisher record, workbook row, or report document with its source member and row index. Source timestamps, units, geographic scope, and revision qualifiers are retained in record_json; event_time is collection time; completed_at is when the entire document became available.
East / West Available Maintenance MarginSPP · source publication	Published additional MW of available maintenance by East/West source file and calendar target label. MKTHOUR remains unqualified source text; event_time is file publication. Use one complete forecast vintage per footprint rather than stacking publications. Complete views require a matching receipt and mirrored row count; empty results are unknown coverage. Raw sources retain publication history internally.