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Data as of 2026-09-19
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Built 2026-09-21 (21 September 2026)

TEPC Daily Load Shape and Duck Curve by Hour, 22 August to 19 September 2026

In the 29 complete local days from 22 August to 19 September 2026, electricity demand in TEPC averaged 2,125 MW and typically peaked at 17:00 local time (2,708 MW) and bottomed out at 04:00 (1,686 MW). With solar and wind taken off, the remaining load fell to 1,345 MW at 09:00 and then rose 425 MW between 14:00 to 17:00. Hours are local clock time (America/Phoenix).

Key Facts

  • Over 29 complete local days from 22 August to 19 September 2026, average demand in TEPC was 2,125 MW. The hour of the day with the highest average demand was 17:00 local time (2,708 MW) and the lowest was 04:00 (1,686 MW).
  • The largest three hour rise in average demand was 207 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 3,401 MW, in the hour starting 27 Aug 2026, 17:00 MST (UTC-07:00).
  • Solar output averaged 525 MW at its 11:00 peak, 25% of average demand.
  • Demand minus solar and wind (net load) averaged 1,836 MW, fell to 1,345 MW at 09:00 and rose 425 MW over the three hours from 14:00 to 17:00, 20% of average demand.

Average Day by Local Hour

29 days to 2026-09-19, America/Phoenix time
TEPC average demand and net generation by local hour Average electricity demand in TEPC by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 04:00 (1,686 MW) and highest at 17:00 (2,708 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 750 1,500 2,250 3,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in TEPC by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 04:00 (1,686 MW) and highest at 17:00 (2,708 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports.
Mean MW by local hour, 2026-08-22 to 2026-09-19
TEPC average demand and net generation by local hour
Local hour (America/Phoenix)DemandNet generation
00:001,891 MW2,094 MW
01:001,803 MW2,036 MW
02:001,746 MW1,975 MW
03:001,701 MW1,920 MW
04:001,686 MW1,885 MW
05:001,708 MW1,908 MW
06:001,870 MW1,925 MW
07:001,812 MW1,802 MW
08:001,834 MW1,726 MW
09:001,881 MW1,733 MW
10:001,981 MW1,779 MW
11:002,047 MW1,860 MW
12:002,083 MW1,958 MW
13:002,409 MW2,172 MW
14:002,501 MW2,250 MW
15:002,525 MW2,313 MW
16:002,616 MW2,444 MW
17:002,708 MW2,581 MW
18:002,617 MW2,591 MW
19:002,560 MW2,562 MW
20:002,475 MW2,471 MW
21:002,340 MW2,376 MW
22:002,172 MW2,279 MW
23:002,041 MW2,192 MW
TEPC duck curve: demand and net load by local hour Average demand and net load (demand minus solar and wind) in TEPC by local clock hour over 29 complete local days from 22 August to 19 September 2026. Net load was lowest at 09:00 (1,345 MW) and then rose 425 MW between 14:00 to 17:00. 0 750 1,500 2,250 3,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average demand and net load (demand minus solar and wind) in TEPC by local clock hour over 29 complete local days from 22 August to 19 September 2026. Net load was lowest at 09:00 (1,345 MW) and then rose 425 MW between 14:00 to 17:00.
Mean MW by local hour, 2026-08-22 to 2026-09-19
TEPC duck curve: demand and net load by local hour
Local hour (America/Phoenix)DemandNet load (demand minus solar and wind)
00:001,891 MW1,743 MW
01:001,803 MW1,652 MW
02:001,746 MW1,605 MW
03:001,701 MW1,572 MW
04:001,686 MW1,571 MW
05:001,708 MW1,599 MW
06:001,870 MW1,746 MW
07:001,812 MW1,512 MW
08:001,834 MW1,364 MW
09:001,881 MW1,345 MW
10:001,981 MW1,425 MW
11:002,047 MW1,486 MW
12:002,083 MW1,524 MW
13:002,409 MW1,880 MW
14:002,501 MW1,994 MW
15:002,525 MW2,064 MW
16:002,616 MW2,210 MW
17:002,708 MW2,418 MW
18:002,617 MW2,467 MW
19:002,560 MW2,441 MW
20:002,475 MW2,347 MW
21:002,340 MW2,190 MW
22:002,172 MW2,018 MW
23:002,041 MW1,891 MW
TEPC average solar and wind output by local hour Average solar and wind generation in TEPC by local clock hour over 29 complete local days from 22 August to 19 September 2026. Solar peaked at 11:00 at 525 MW. 0 150 300 450 600 00:0003:0006:0009:0012:0015:0018:0021:00
Average solar and wind generation in TEPC by local clock hour over 29 complete local days from 22 August to 19 September 2026. Solar peaked at 11:00 at 525 MW.
Mean MW by local hour, 2026-08-22 to 2026-09-19
TEPC average solar and wind output by local hour
Local hour (America/Phoenix)SolarWind
00:000 MW148 MW
01:000 MW152 MW
02:000 MW141 MW
03:000 MW130 MW
04:000 MW115 MW
05:000 MW109 MW
06:0038 MW87 MW
07:00240 MW60 MW
08:00422 MW47 MW
09:00494 MW42 MW
10:00517 MW39 MW
11:00525 MW36 MW
12:00518 MW41 MW
13:00487 MW43 MW
14:00454 MW54 MW
15:00401 MW60 MW
16:00340 MW66 MW
17:00215 MW75 MW
18:0058 MW92 MW
19:004 MW114 MW
20:000 MW128 MW
21:000 MW150 MW
22:000 MW154 MW
23:000 MW151 MW
Average TEPC demand, net generation, solar, wind and net load by local hour
Local hourDemandNet generationSolarWindNet load
00:00 1,891 MW 2,094 MW 0 MW 148 MW 1,743 MW
01:00 1,803 MW 2,036 MW 0 MW 152 MW 1,652 MW
02:00 1,746 MW 1,975 MW 0 MW 141 MW 1,605 MW
03:00 1,701 MW 1,920 MW 0 MW 130 MW 1,572 MW
04:00 1,686 MW 1,885 MW 0 MW 115 MW 1,571 MW
05:00 1,708 MW 1,908 MW 0 MW 109 MW 1,599 MW
06:00 1,870 MW 1,925 MW 38 MW 87 MW 1,746 MW
07:00 1,812 MW 1,802 MW 240 MW 60 MW 1,512 MW
08:00 1,834 MW 1,726 MW 422 MW 47 MW 1,364 MW
09:00 1,881 MW 1,733 MW 494 MW 42 MW 1,345 MW
10:00 1,981 MW 1,779 MW 517 MW 39 MW 1,425 MW
11:00 2,047 MW 1,860 MW 525 MW 36 MW 1,486 MW
12:00 2,083 MW 1,958 MW 518 MW 41 MW 1,524 MW
13:00 2,409 MW 2,172 MW 487 MW 43 MW 1,880 MW
14:00 2,501 MW 2,250 MW 454 MW 54 MW 1,994 MW
15:00 2,525 MW 2,313 MW 401 MW 60 MW 2,064 MW
16:00 2,616 MW 2,444 MW 340 MW 66 MW 2,210 MW
17:00 2,708 MW 2,581 MW 215 MW 75 MW 2,418 MW
18:00 2,617 MW 2,591 MW 58 MW 92 MW 2,467 MW
19:00 2,560 MW 2,562 MW 4 MW 114 MW 2,441 MW
20:00 2,475 MW 2,471 MW 0 MW 128 MW 2,347 MW
21:00 2,340 MW 2,376 MW 0 MW 150 MW 2,190 MW
22:00 2,172 MW 2,279 MW 0 MW 154 MW 2,018 MW
23:00 2,041 MW 2,192 MW 0 MW 151 MW 1,891 MW

Each value is the mean over 29 complete local days from 22 August to 19 September 2026, weekdays and weekends together, for the hour starting at that local clock time. Net load is demand minus solar and wind generation. The single highest hour of demand in the whole 30 day window was 3,401 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 2026-09-19. Profiles are computed by World Power Monitor from the operator's hourly series.

Assumptions

  • Hours are local clock time in America/Phoenix. 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.