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Time of Use Rate Update
The South Carolina Public Service Commission has approved proposed updates to time-of-use (TOU) rates and time periods.
New time periods begin July 1, 2026. The new rates will apply to bills issued on or after July 1, 2026.
Important: Beginning July 1, weekends and holidays will be treated the same as weekdays, meaning on‑peak hours will apply on weekends and holidays.
Final approved rates will be posted on July 7, 2026 on our Rates and Tariffs page.
Frequently Asked Questions
Under the new rates, weekends and holidays are treated the same as weekdays.
Summer Months
| Previous | New | |
|---|---|---|
| Months | May – September | May – September |
| On-Peak Hours | 4 p.m. – 8 p.m. | 4 p.m. – 8 p.m. |
| Off-Peak Hours | 5 a.m. – 4 p.m. 8 p.m. – 1 a.m. |
5 a.m. – 4 p.m. 8 p.m. – 1 a.m. |
| Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. |
Winter Months
| Previous | New | |
|---|---|---|
| Months | October – April | October – April |
| On-Peak Hours | 6 a.m. – 9 a.m. | 6 a.m. – 9 a.m. |
| Off-Peak Hours | 9 a.m. – 1 a.m. 5 a.m. – 6 a.m. |
9 a.m. – 12 p.m. 3 p.m. – 1 a.m. 5 a.m. – 6 a.m. |
| Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. 12 p.m. – 3 p.m. (NEW) |
Summer Months
| Previous | New | |
|---|---|---|
| Months | May – September | May – September |
| On-Peak Hours | 6 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Off-Peak Hours | 5 a.m. – 6 p.m. 10 p.m. – 1 a.m. |
5 a.m. – 5 p.m. 9 p.m. – 1 a.m. |
| Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. |
Winter Months
| Previous | New | |
|---|---|---|
| Months | October – April | October – April |
| On-Peak Hours | 6 a.m. – 9 a.m. 6 p.m. – 10 p.m. |
6 a.m. – 9 a.m. 5 p.m. – 9 p.m. |
| Off-Peak Hours | 9 a.m. – 6 p.m. 10 p.m. – 1 a.m. 5 a.m. – 6 a.m. |
9 a.m. – 5 p.m. 9 p.m. – 1 a.m. 5 a.m. – 6 a.m. |
| Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. |
Summer Months
| Previous | New | |
|---|---|---|
| Months | May – September | May – September |
| On-Peak Hours | 6 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Off-Peak Hours | 5 a.m. – 6 p.m. 10 p.m. – 1 a.m. |
5 a.m. – 5 p.m. 9 p.m. – 1 a.m. |
| Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. |
Winter Months
| Previous | New | |
|---|---|---|
| Months | October – April | October – April |
| On-Peak Hours | 6 a.m. – 9 a.m. 6 p.m. – 10 p.m. |
6 a.m. – 9 a.m. 5 p.m. – 9 p.m. |
| Off-Peak Hours | 9 a.m. – 6 p.m. 10 p.m. – 1 a.m. 5 a.m. – 6 a.m. |
9 a.m. – 5 p.m. 9 p.m. – 1 a.m. 5 a.m. – 6 a.m. |
| Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. |
Summer Months
| Previous | New | |
|---|---|---|
| Months | May – September | May – September |
| Energy On-Peak Hours | 6 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Energy Off-Peak Hours | 10 p.m. – 1 a.m. 5 a.m. – 6 p.m. |
9 p.m. – 1 a.m. 5 a.m. – 5 p.m. |
| Energy Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. |
| Demand On-Peak Hours | 3 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Demand Off-Peak Hours | 10 p.m. – 3 p.m. | 9 p.m. – 5 p.m. |
Winter Months
| Previous | New | |
|---|---|---|
| Months | October – April | October – April |
| Energy On-Peak Hours | 6 a.m. – 9 a.m. 6 p.m. – 10 p.m. |
6 a.m. – 9 a.m. 5 p.m. – 9 p.m. |
| Energy Off-Peak Hours | 5 a.m. – 6 a.m. 9 a.m. – 6 p.m. 10 p.m. – 1 a.m. |
5 a.m. – 6 a.m. 9 a.m. – 5 p.m. 9 p.m. – 1 a.m. |
| Energy Super Off-Peak Hours | 1 a.m. – 5 p.m. | 1 a.m. – 5 a.m. |
| Demand On-Peak Hours | 3 p.m. – 10 p.m. | 6 a.m. – 9 a.m. 5 p.m. – 9 p.m. |
| Demand Off-Peak Hours | 10 p.m. – 3 p.m. | 9 a.m. – 5 p.m. 9 p.m. – 6 a.m. |
Summer Months
| Previous | New | |
|---|---|---|
| Months | May – September | May – September |
| Energy On-Peak Hours | 6 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Energy Off-Peak Hours | 10 p.m. – 1 a.m. 5 a.m. – 6 p.m. |
9 p.m. – 1 a.m. 5 a.m. – 5 p.m. |
| Energy Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. |
| Demand On-Peak Hours | 3 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Demand Off-Peak Hours | 10 p.m. – 3 p.m. | 9 p.m. – 5 p.m. |
Winter Months
| Previous | New | |
|---|---|---|
| Months | October – April | October – April |
| Energy On-Peak Hours | 6 a.m. – 9 a.m. 6 p.m. – 10 p.m. |
6 a.m. – 9 a.m. 5 p.m. – 9 p.m. |
| Energy Off-Peak Hours | 5 a.m. – 6 a.m. 9 a.m. – 6 p.m. 10 p.m. – 1 a.m. |
5 a.m. – 6 a.m. 9 a.m. – 5 p.m. 9 p.m. – 1 a.m. |
| Energy Super Off-Peak Hours | 1 a.m. – 5 p.m. | 1 a.m. – 5 a.m. |
| Demand On-Peak Hours | 3 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Demand Off-Peak Hours | 10 p.m. – 3 p.m. | 9 p.m. – 5 p.m. |
Summer Months
| Previous | New | |
|---|---|---|
| Months | May – September | May – September |
| Energy On-Peak Hours | 6 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Energy Off-Peak Hours | 10 p.m. – 1 a.m. 5 a.m. – 6 p.m. |
9 p.m. – 1 a.m. 5 a.m. – 5 p.m. |
| Energy Super Off-Peak Hours | 1 a.m. – 5 a.m. | 1 a.m. – 5 a.m. |
| Demand On-Peak Hours | 3 p.m. – 10 p.m. | 5 p.m. – 9 p.m. |
| Demand Off-Peak Hours | 10 p.m. – 3 p.m. | 9 p.m. – 5 p.m. |
| Demand Super Off-Peak Hours | N/A | N/A |
Winter Months
| Previous | New | |
|---|---|---|
| Months | October – April | October – April |
| Energy On-Peak Hours | 6 a.m. – 9 a.m. 6 p.m. – 10 p.m. |
6 a.m. – 9 a.m. 5 p.m. – 9 p.m. |
| Energy Off-Peak Hours | 5 a.m. – 6 a.m. 9 a.m. – 6 p.m. 10 p.m. – 1 a.m. |
5 a.m. – 6 a.m. 9 a.m. – 5 p.m. 9 p.m. – 1 a.m. |
| Energy Super Off-Peak Hours | 1 a.m. – 5 p.m. | 1 a.m. – 5 a.m. |
| Demand On-Peak Hours | 3 p.m. – 10 p.m. | 6 a.m. – 9 a.m. 5 p.m. – 9 p.m. |
| Demand Off-Peak Hours | 10 p.m. – 3 p.m. | 9 a.m. – 5 p.m. 9 p.m. – 6 a.m. |
| Demand Super Off-Peak Hours | N/A | N/A |
For residential Solar Choice customers, any extra energy your system makes will first be applied toward energy you get from us during the same time it was produced. If there's still extra energy left, it will then be applied toward energy you get from us during the other time periods that are worth the same or less.
You can learn more about ways to use less energy and save money through programs and services for eligible homes and businesses.
For more information about current rates, visit our Rates and Tariffs page.