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Data as of 2026-10-27
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Built 2026-10-28 (28 October 2026)

IID Daily Load Shape and Duck Curve by Hour, 29 September to 27 October 2026

In the 29 complete local days from 29 September to 27 October 2026, electricity demand in IID averaged 431 MW and typically peaked at 16:00 local time (593 MW) and bottomed out at 04:00 (304 MW). With solar taken off, the remaining load fell to -91 MW at 10:00 and then rose 424 MW between 15:00 to 18:00. Hours are local clock time (America/Los_Angeles).

Key Facts

  • Over 29 complete local days from 29 September to 27 October 2026, average demand in IID was 431 MW. The hour of the day with the highest average demand was 16:00 local time (593 MW) and the lowest was 04:00 (304 MW).
  • The largest three hour rise in average demand was 23 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 908 MW, in the hour starting 8 Oct 2026, 16:00 PDT (UTC-07:00).
  • Solar output averaged 511 MW at its 12:00 peak, 119% of average demand.
  • Demand minus solar (net load) averaged 241 MW, fell to -91 MW at 10:00 and rose 424 MW over the three hours from 15:00 to 18:00, 99% of average demand.

Average Day by Local Hour

29 days to 2026-10-27, America/Los_Angeles time
IID average demand and net generation by local hour Average electricity demand in IID by local clock hour over 29 complete local days from 29 September to 27 October 2026. It was lowest at 04:00 (304 MW) and highest at 16:00 (593 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 250 500 750 1,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in IID by local clock hour over 29 complete local days from 29 September to 27 October 2026. It was lowest at 04:00 (304 MW) and highest at 16:00 (593 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports.
Mean MW by local hour, 2026-09-29 to 2026-10-27
IID average demand and net generation by local hour
Local hour (America/Los_Angeles)DemandNet generation
00:00348 MW487 MW
01:00327 MW474 MW
02:00313 MW481 MW
03:00305 MW475 MW
04:00304 MW469 MW
05:00317 MW477 MW
06:00336 MW515 MW
07:00345 MW603 MW
08:00364 MW789 MW
09:00389 MW894 MW
10:00418 MW924 MW
11:00448 MW926 MW
12:00487 MW938 MW
13:00519 MW933 MW
14:00559 MW934 MW
15:00585 MW928 MW
16:00593 MW842 MW
17:00582 MW666 MW
18:00554 MW603 MW
19:00520 MW585 MW
20:00483 MW555 MW
21:00448 MW551 MW
22:00413 MW532 MW
23:00378 MW489 MW
IID duck curve: demand and net load by local hour Average demand and net load (demand minus solar) in IID by local clock hour over 29 complete local days from 29 September to 27 October 2026. Net load was lowest at 10:00 (-91 MW) and then rose 424 MW between 15:00 to 18:00. -91 82 255 427 600 00:0003:0006:0009:0012:0015:0018:0021:00
Average demand and net load (demand minus solar) in IID by local clock hour over 29 complete local days from 29 September to 27 October 2026. Net load was lowest at 10:00 (-91 MW) and then rose 424 MW between 15:00 to 18:00.
Mean MW by local hour, 2026-09-29 to 2026-10-27
IID duck curve: demand and net load by local hour
Local hour (America/Los_Angeles)DemandNet load (demand minus solar)
00:00348 MW341 MW
01:00327 MW322 MW
02:00313 MW307 MW
03:00305 MW302 MW
04:00304 MW301 MW
05:00317 MW314 MW
06:00336 MW330 MW
07:00345 MW230 MW
08:00364 MW4 MW
09:00389 MW-86 MW
10:00418 MW-91 MW
11:00448 MW-63 MW
12:00487 MW-24 MW
13:00519 MW11 MW
14:00559 MW63 MW
15:00585 MW116 MW
16:00593 MW236 MW
17:00582 MW471 MW
18:00554 MW540 MW
19:00520 MW495 MW
20:00483 MW460 MW
21:00448 MW428 MW
22:00413 MW403 MW
23:00378 MW372 MW
IID average solar output by local hour Average solar generation in IID by local clock hour over 29 complete local days from 29 September to 27 October 2026. Solar peaked at 12:00 at 511 MW. 0 150 300 450 600 00:0003:0006:0009:0012:0015:0018:0021:00
Average solar generation in IID by local clock hour over 29 complete local days from 29 September to 27 October 2026. Solar peaked at 12:00 at 511 MW.
Mean MW by local hour, 2026-09-29 to 2026-10-27
IID average solar output by local hour
Local hour (America/Los_Angeles)Solar
00:006 MW
01:006 MW
02:006 MW
03:004 MW
04:003 MW
05:003 MW
06:006 MW
07:00115 MW
08:00359 MW
09:00476 MW
10:00508 MW
11:00510 MW
12:00511 MW
13:00509 MW
14:00495 MW
15:00469 MW
16:00357 MW
17:00111 MW
18:0013 MW
19:0025 MW
20:0023 MW
21:0020 MW
22:0010 MW
23:006 MW
Average IID demand, net generation, solar and net load by local hour
Local hourDemandNet generationSolarNet load
00:00 348 MW 487 MW 6 MW 341 MW
01:00 327 MW 474 MW 6 MW 322 MW
02:00 313 MW 481 MW 6 MW 307 MW
03:00 305 MW 475 MW 4 MW 302 MW
04:00 304 MW 469 MW 3 MW 301 MW
05:00 317 MW 477 MW 3 MW 314 MW
06:00 336 MW 515 MW 6 MW 330 MW
07:00 345 MW 603 MW 115 MW 230 MW
08:00 364 MW 789 MW 359 MW 4 MW
09:00 389 MW 894 MW 476 MW -86 MW
10:00 418 MW 924 MW 508 MW -91 MW
11:00 448 MW 926 MW 510 MW -63 MW
12:00 487 MW 938 MW 511 MW -24 MW
13:00 519 MW 933 MW 509 MW 11 MW
14:00 559 MW 934 MW 495 MW 63 MW
15:00 585 MW 928 MW 469 MW 116 MW
16:00 593 MW 842 MW 357 MW 236 MW
17:00 582 MW 666 MW 111 MW 471 MW
18:00 554 MW 603 MW 13 MW 540 MW
19:00 520 MW 585 MW 25 MW 495 MW
20:00 483 MW 555 MW 23 MW 460 MW
21:00 448 MW 551 MW 20 MW 428 MW
22:00 413 MW 532 MW 10 MW 403 MW
23:00 378 MW 489 MW 6 MW 372 MW

Each value is the mean over 29 complete local days from 29 September to 27 October 2026, weekdays and weekends together, for the hour starting at that local clock time. Net load is demand minus solar generation. The single highest hour of demand in the whole 30 day window was 908 MW; it is a published reading, not an average, and is not part of the profile above.

Source: U.S. Energy Information Administration (EIA). (US Government work, public domain) Data as of 2026-10-27. Profiles are computed by World Power Monitor from the operator's hourly series.

Assumptions

  • Hours are local clock time in America/Los_Angeles. A local day is used only if it is whole inside the 30 day window and at least 22 of its hours are complete; the profile uses the 29 most recent such days. Daylight saving follows the local clock: on a clock change day the missing hour is absent and the repeated hour is averaged over both readings.
  • The average mixes weekdays and weekends and covers only 29 days, so it describes recent conditions, not a seasonal norm.
  • The evening ramp is the largest rise over three hours in the average profile, starting between 14:00 and 20:00 local time.
Cite this page
APA 7

World Power Monitor. (2026). IID Daily Load Shape and Duck Curve by Hour. https://worldpowermonitor.com/load-shapes/iid/

Plain text

World Power Monitor. IID Daily Load Shape and Duck Curve by Hour. Data as of 2026-10-27. Data from U.S. Energy Information Administration. https://worldpowermonitor.com/load-shapes/iid/

BibTeX 
@misc{wpm_load_shapes_iid_2026,
  title = {{IID Daily Load Shape and Duck Curve by Hour}},
  author = {{World Power Monitor}},
  year = {2026},
  note = {Data as of 2026-10-27. Data from U.S. Energy Information Administration.},
  url = {https://worldpowermonitor.com/load-shapes/iid/}
}

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