SPP Southwest electricity demand today
Southwest Power Pool (SPP) used today
315,745MWhD
Metered to · hourly, delayed
Now
Demand
26473M MWhourly · EIA-930 preliminary · delayed
No price is shown for this market: the EIA-930 feed carries demand and generation, not prices.
Last 24 hours
Min 26342, max 33838, latest 26473 MW. Line breaks mark gaps longer than two reporting intervals.
Baseline building: 2 of 28 days.
Generation mix
This market publishes no generation mix.
About this market
Southwest Power Pool covers a vast, windy stretch of the central United States. As a regional transmission organization it serves members in all or part of 17 states, a territory of about 732,086 square miles. EIA lists it as SWPP; you will see that code in the data.
Wind is what sets SPP apart. Wind produced 36.7% of its energy in 2025, more than any other fuel. In the capacity ledger the picture is different: wind is only 8.4% of accredited capacity, so the share of energy and the share of firm supply are very different things. When the wind drops on a still summer evening, other fuels must cover the gap.
Demand is climbing. SPP’s coincident peak load was 58,181 MW on 7/27/2026, and summer afternoons define the system’s stress. Because SPP and MISO are joined by interties, congestion in one region can show up in the other.
Official SPP prices are published by SPP; we do not show prices on this page. You see hourly demand, net generation, net interchange and generation by fuel where reported, from the EIA Hourly Electric Grid Monitor. Values are preliminary, revised later, delayed by an hour or two, and refreshed every three hours. Not for trading or operational decisions.
Source
Source
US EIA · licence · Source: U.S. Energy Information Administration, Hourly Electric Grid Monitor (EIA-930) · fetched ·
Source: U.S. Energy Information Administration, Hourly Electric Grid Monitor (EIA-930). Values are preliminary hourly averages (MWh per hour, shown as MW), published about one to two hours after the hour and refreshed every few hours; they can be revised.
Each value is shown as of the end of the hour it covers. If the feed is silent for more than 8 hours the figure is marked paused with its last value; nothing is estimated.
Facts
- SPP is a Regional Transmission Organization serving members in all or part of 17 states, with additional energy services to customers in 23 states and provinces. Source: SPP
- The service territory covers about 732,086 square miles and the membership numbers 161 (October 2026). Source: SPP
- Coincident peak load was 58,181 MW (7/27/2026); winter peak load was 48,142 MW (2/20/2025). Source: SPP
- Accredited generating capacity is 65,639 MW as of June 2025: 48.4% natural gas, 32.7% coal and 8.4% wind. Source: SPP
- In 2025 SPP produced 300,382 GWh: 36.7% wind, 29% coal and 25.1% natural gas. Source: SPP
- The East balancing authority has 1,013 generating plants and 72,979 miles of transmission; the West has 166 plants and 12,552 miles. Source: SPP
- The Integrated Marketplace launched in 2014 and includes a day-ahead market, a reliability unit commitment process and a real-time balancing market. Source: SPP
- Average hourly wind curtailment in SPP rose from 136 MW in 2019 to 1,097 MW in 2023 (EIA). Source: EIA
- SPP's demand record in the EIA monitor is 58.0 GW on 27 July 2026, 3.5% above the pre-2026 peak of 56.0 GW on 21 August 2023 (EIA). Source: EIA
Other markets
Demand in other markets
- Great Britain: 25140M MW
- Denmark: 5954D MW
- NEM New South Wales: 6547M MW
- NEM Queensland: 5836M MW
- NEM Victoria: 4530M MW
- NEM South Australia: 1245M MW
- NEM Tasmania: 878M MW
- Taiwan: 26238M MW
- ERCOT (Texas): 44674M MWhourly · EIA-930 preliminary · delayed
- PJM Interconnection: 78578M MWhourly · EIA-930 preliminary · delayed
- MISO: 61910M MWhourly · EIA-930 preliminary · delayed
- ISO New England: 11022M MWhourly · EIA-930 preliminary · delayed
Cite this
SolarCostData Data Desk (2026). Southwest Power Pool (SPP) electricity data, solarcostdata.com/markets/us-swpp/, accessed 2026-10-25. Source data: Source: U.S. Energy Information Administration, Hourly Electric Grid Monitor (EIA-930).
Download last 24 h: data.csv · data.json (CC BY 4.0 (our figures); source data: Source: U.S. Energy Information Administration, Hourly Electric Grid Monitor (EIA-930))
Not for trading or operational decisions. Provisional data.