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

SCEG 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 SCEG averaged 3,444 MW and typically peaked at 16:00 local time (4,231 MW) and bottomed out at 04:00 (2,751 MW). With solar taken off, the remaining load fell to 2,729 MW at 09:00 and then rose 342 MW between 15:00 to 18:00. Hours are local clock time (America/New_York).

Key Facts

  • Over 29 complete local days from 22 August to 19 September 2026, average demand in SCEG was 3,444 MW. The hour of the day with the highest average demand was 16:00 local time (4,231 MW) and the lowest was 04:00 (2,751 MW).
  • The largest three hour rise in average demand was 40 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 4,819 MW, in the hour starting 2 Sept 2026, 16:00 EDT (UTC-04:00).
  • Solar output averaged 775 MW at its 12:00 peak, 23% of average demand.
  • Demand minus solar (net load) averaged 3,159 MW, fell to 2,729 MW at 09:00 and rose 342 MW over the three hours from 15:00 to 18:00, 10% of average demand.

Average Day by Local Hour

29 days to 2026-09-19, America/New_York time
SCEG average demand and net generation by local hour Average electricity demand in SCEG by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 04:00 (2,751 MW) and highest at 16:00 (4,231 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 1,250 2,500 3,750 5,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in SCEG by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 04:00 (2,751 MW) and highest at 16:00 (4,231 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
SCEG average demand and net generation by local hour
Local hour (America/New_York)DemandNet generation
00:002,934 MW2,992 MW
01:002,848 MW2,908 MW
02:002,799 MW2,860 MW
03:002,764 MW2,829 MW
04:002,751 MW2,810 MW
05:002,785 MW2,836 MW
06:002,875 MW2,921 MW
07:002,889 MW2,982 MW
08:003,051 MW3,147 MW
09:003,283 MW3,358 MW
10:003,494 MW3,555 MW
11:003,690 MW3,745 MW
12:003,869 MW3,898 MW
13:004,046 MW4,063 MW
14:004,151 MW4,164 MW
15:004,212 MW4,219 MW
16:004,231 MW4,245 MW
17:004,191 MW4,212 MW
18:004,084 MW4,097 MW
19:003,919 MW3,968 MW
20:003,786 MW3,826 MW
21:003,574 MW3,611 MW
22:003,328 MW3,395 MW
23:003,099 MW3,136 MW
SCEG duck curve: demand and net load by local hour Average demand and net load (demand minus solar) in SCEG by local clock hour over 29 complete local days from 22 August to 19 September 2026. Net load was lowest at 09:00 (2,729 MW) and then rose 342 MW between 15:00 to 18:00. 0 1,250 2,500 3,750 5,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average demand and net load (demand minus solar) in SCEG by local clock hour over 29 complete local days from 22 August to 19 September 2026. Net load was lowest at 09:00 (2,729 MW) and then rose 342 MW between 15:00 to 18:00.
Mean MW by local hour, 2026-08-22 to 2026-09-19
SCEG duck curve: demand and net load by local hour
Local hour (America/New_York)DemandNet load (demand minus solar)
00:002,934 MW2,934 MW
01:002,848 MW2,848 MW
02:002,799 MW2,799 MW
03:002,764 MW2,764 MW
04:002,751 MW2,751 MW
05:002,785 MW2,785 MW
06:002,875 MW2,875 MW
07:002,889 MW2,844 MW
08:003,051 MW2,754 MW
09:003,283 MW2,729 MW
10:003,494 MW2,813 MW
11:003,690 MW2,929 MW
12:003,869 MW3,094 MW
13:004,046 MW3,274 MW
14:004,151 MW3,403 MW
15:004,212 MW3,510 MW
16:004,231 MW3,589 MW
17:004,191 MW3,682 MW
18:004,084 MW3,852 MW
19:003,919 MW3,851 MW
20:003,786 MW3,754 MW
21:003,574 MW3,561 MW
22:003,328 MW3,327 MW
23:003,099 MW3,099 MW
SCEG average solar output by local hour Average solar generation in SCEG by local clock hour over 29 complete local days from 22 August to 19 September 2026. Solar peaked at 12:00 at 775 MW. 0 200 400 600 800 00:0003:0006:0009:0012:0015:0018:0021:00
Average solar generation in SCEG by local clock hour over 29 complete local days from 22 August to 19 September 2026. Solar peaked at 12:00 at 775 MW.
Mean MW by local hour, 2026-08-22 to 2026-09-19
SCEG average solar output by local hour
Local hour (America/New_York)Solar
00:000 MW
01:000 MW
02:000 MW
03:000 MW
04:000 MW
05:000 MW
06:000 MW
07:0045 MW
08:00297 MW
09:00553 MW
10:00681 MW
11:00761 MW
12:00775 MW
13:00773 MW
14:00748 MW
15:00702 MW
16:00642 MW
17:00510 MW
18:00232 MW
19:0068 MW
20:0032 MW
21:0013 MW
22:001 MW
23:000 MW
Average SCEG demand, net generation, solar and net load by local hour
Local hourDemandNet generationSolarNet load
00:00 2,934 MW 2,992 MW 0 MW 2,934 MW
01:00 2,848 MW 2,908 MW 0 MW 2,848 MW
02:00 2,799 MW 2,860 MW 0 MW 2,799 MW
03:00 2,764 MW 2,829 MW 0 MW 2,764 MW
04:00 2,751 MW 2,810 MW 0 MW 2,751 MW
05:00 2,785 MW 2,836 MW 0 MW 2,785 MW
06:00 2,875 MW 2,921 MW 0 MW 2,875 MW
07:00 2,889 MW 2,982 MW 45 MW 2,844 MW
08:00 3,051 MW 3,147 MW 297 MW 2,754 MW
09:00 3,283 MW 3,358 MW 553 MW 2,729 MW
10:00 3,494 MW 3,555 MW 681 MW 2,813 MW
11:00 3,690 MW 3,745 MW 761 MW 2,929 MW
12:00 3,869 MW 3,898 MW 775 MW 3,094 MW
13:00 4,046 MW 4,063 MW 773 MW 3,274 MW
14:00 4,151 MW 4,164 MW 748 MW 3,403 MW
15:00 4,212 MW 4,219 MW 702 MW 3,510 MW
16:00 4,231 MW 4,245 MW 642 MW 3,589 MW
17:00 4,191 MW 4,212 MW 510 MW 3,682 MW
18:00 4,084 MW 4,097 MW 232 MW 3,852 MW
19:00 3,919 MW 3,968 MW 68 MW 3,851 MW
20:00 3,786 MW 3,826 MW 32 MW 3,754 MW
21:00 3,574 MW 3,611 MW 13 MW 3,561 MW
22:00 3,328 MW 3,395 MW 1 MW 3,327 MW
23:00 3,099 MW 3,136 MW 0 MW 3,099 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 generation. The single highest hour of demand in the whole 30 day window was 4,819 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/New_York. 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.