Tri-County Electric Co-op, Inc (SC) electricity rates
Electric cooperative · South Carolina · SERC region
Tri-County Electric Co-op, Inc (SC) is a member-owned electric cooperative, so its customers own it and elect its board, serving 17,670 homes in South Carolina. Its residential customers pay an average of 20.84¢/kWh including fixed and delivery charges, 16% more than the U.S. average.
Rate basis: EIA-861 2025 annual data, adjusted to the 12 months ending 2026-07 using the state's price trend.
What things cost on Tri-County Electric Co-op, Inc (SC)'s rate
Popular — tap to add, then add more to compare:
Add as many devices as you like to compare them side by side. Search again to add another, or use Duplicate to compare two settings.
Tri-County Electric Co-op, Inc (SC) bill estimates
| Monthly use | At average all-in rate |
|---|---|
| 500 kWh | $104.20 |
| 1,000 kWh | $208.40 |
| 1,500 kWh | $312.60 |
| 2,000 kWh | $416.80 |
Tri-County Electric Co-op, Inc (SC) rate history
2015–2025: +32% change in the average residential rate (15.12¢ → 19.94¢). Annual EIA-861 data.
Outages & reliability
Right now
Checking live outages…
Reliability history
| 2025 | Tri-County Electric Co-op, Inc (SC) | South Carolina avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 265 | 151 | 266 |
| Outages per customer (SAIFI) | 2.45 | 1.16 | 1.34 |
| Average restoration time (CAIDI) | 108 min | — | — |
| Outage minutes excluding major storms | 112 | 102 | 121 |
Outages in counties served (2025)
From ORNL EAGLE-I, which tracks customers without power every 15 minutes. These counts cover every utility in each county. Weighted across Tri-County Electric Co-op, Inc (SC)'s counties, customers averaged 2 hr 59 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Calhoun | 344 | 64 | 12,785 | 2025-06-26 |
| Lexington | 240 | 48 | 55,567 | 2025-06-08 |
| Richland | 172 | 38 | 43,801 | 2025-06-26 |
| Sumter | 149 | 60 | 22,428 | 2025-06-20 |
| Kershaw | 128 | 45 | 4,356 | 2025-06-20 |
| Orangeburg | 72 | 37 | 6,191 | 2025-06-26 |
Tri-County Electric Co-op, Inc (SC) service area
Tri-County Electric Co-op, Inc (SC) serves 6 counties in South Carolina and 20 ZIP codes.
Calhoun, Kershaw, Lexington, Orangeburg, Richland, Sumter
Cities: Columbia, Orangeburg, Brookdale, Hopkins, Edisto, Wilkinson Heights, South Congaree, Pineridge, Saint Matthews, Gaston, Gadsden, Holly Hill
Programs, smart meters & solar
| Smart meters (AMI) for homes | 0% |
| Time-based rate programs | None reported |
| Net-metered solar homes | 210 |
| Homes in demand response (e.g. thermostat rebates) | 17,326 |
Tri-County Electric Co-op, Inc (SC) at a glance
| Ownership | Electric cooperative |
| Services | Distribution |
| Commercial rate | 17.07¢/kWh |
| Industrial rate | 13.18¢/kWh |
| Retail revenue (2025) | $57,952,000 |
| Electricity sold (2025) | 307,209 MWh |
| Peak demand | 79 MW summer · 97 MW winter |
| Line losses | 4.8% |
| Balancing authority | SC |
| EIA utility ID | 14175 |
Other utilities in South Carolina
Frequently asked questions
What is Tri-County Electric Co-op, Inc (SC)'s electricity rate?
Tri-County Electric Co-op, Inc (SC) residential customers pay an average of 20.84¢ per kWh, all charges included (EIA-861 2025 annual data, adjusted to the 12 months ending 2026-07 using the state's price trend). That's 33% above the South Carolina average of 15.64¢ and 16% above the U.S. average.
What is the average Tri-County Electric Co-op, Inc (SC) electric bill?
About $236 a month. The average Tri-County Electric Co-op, Inc (SC) home uses 1,131 kWh a month. At 1,000 kWh the bill would be about $208.
How many customers does Tri-County Electric Co-op, Inc (SC) have?
Tri-County Electric Co-op, Inc (SC) serves 17,670 residential customers and 18,488 customers in total in South Carolina, across 6 counties.
How reliable is Tri-County Electric Co-op, Inc (SC)?
In 2025, the average Tri-County Electric Co-op, Inc (SC) customer was without power for 4 hr 25 min (SAIDI) over 2.45 interruptions (SAIFI), including major storms. Excluding major event days it was 112 min. The South Carolina average was 2 hr 31 min and the U.S. average 4 hr 26 min.
Does Tri-County Electric Co-op, Inc (SC) offer net metering for solar?
Tri-County Electric Co-op, Inc (SC) had 210 residential net-metered customers in 2025 with 1.6 MW of capacity. Estimate solar savings at this utility's rate.
Sources: EIA-861 2025 and EIA-861M (through July 2026), OpenEI URDB, ORNL EAGLE-I, U.S. Census. Methodology. Spot an error? Rates change often, so confirm with Tri-County Electric Co-op, Inc (SC) before making decisions.