Tombigbee Electric Power Association Rate Selection Guide
Tombigbee Electric Power Association (TEPA) is a member-owned electric cooperative serving roughly 46,000 meters in northeast Mississippi and a 100% TVA wholesale power distributor. Member data access runs through the CSA Orbit One (UtilityNexus) portal; there is no Green Button, EDI, or public API today.
Tombigbee Electric Power Association Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| GSA-1 | Commercial <50 kW | $25.37 customer + ~$0.136-0.149/kWh | Small shops, offices, light commercial |
| GSA-2 | Commercial 51-1,000 kW | $126.85 customer + $16.59/kW + ~$0.082-0.132/kWh | Mid-size demand-metered businesses |
| GSA-3 | Large C&I | $490.07 customer + $15.14/kW + $0.08614/kWh | Large facilities with high demand |
| TOU (MSB) | Large industrial | $1,500 customer + on/off-peak demand & energy | High load factor manufacturers shifting load off-peak |
Market Overview
Mississippi is a regulated market with no retail electric choice. Tombigbee is a member-owned cooperative that buys 100% of its wholesale power from TVA and resells at board-approved rates. C&I customers cannot select a competitive supplier.
Need to pull your actual usage data to compare rates? See the Tombigbee Electric Power Association Data Access Guide →
Current Rate Schedules
Rates effective May 1, 2026. Tombigbee passes through TVA wholesale costs plus a board-set retail margin (the co-op operates on ~22 cents of each dollar billed). Commercial service is tiered by demand under GSA-1/2/3, with a time-of-use (MSB) option for large/manufacturing loads. A 4.0% retail increase took effect 10/1/2023 and a further increase took effect October 2025; TVA fuel cost adjustments flow through monthly.
Effective: May 1, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| GSA-1 General Service (Commercial, <50 kW) | commercial | Small commercial accounts below 50 kW demand. | Customer charge $25.37/mo; first 300 kWh $0.14879/kWh; additional kWh $0.13622/kWh. (Effective May 1, 2026.) | — |
| GSA-2 General Service (Commercial, 51-1,000 kW) | commercial | Medium commercial accounts, demand-metered, 51-1,000 kW. | Customer charge $126.85/mo; demand $16.59/kW (51-1,000 kW); first 15,000 kWh $0.13223/kWh; additional kWh $0.08210/kWh. (Effective May 1, 2026.) | — |
| GSA-3 General Service (Large Commercial/Industrial) | industrial | Large demand accounts; demand blocks 0-1,000 kW and 1,001-5,000 kW. | Customer charge $490.07/mo; demand $15.14/kW (0-1,000 kW) and $15.14/kW (1,001-5,000 kW); all kWh $0.08614/kWh. (Effective May 1, 2026.) | — |
| Time-of-Use / Manufacturing Service (MSB) | industrial | Large manufacturing and high-load-factor C&I customers electing TVA TOU pricing. | Customer charge $1,500.00/mo; admin $350.00; on-peak demand $10.19/kW; max demand $2.77/kW; off-peak excess $10.19/kW; on-peak energy $0.06452/kWh; off-peak energy tiers $0.02847 and $0.02566/kWh. (Effective May 1, 2026.) | — |
Rate Recommendations by Use Case
Mid-size commercial facility (51-1,000 kW)
GSA-2 with active demand management.
GSA-2 carries a $16.59/kW demand charge, so the bill is dominated by peak demand. Managing the 15-minute peak is the single biggest lever.
- Track interval-equivalent demand via monthly bill demand readings
- Stagger HVAC and large motor startups
- Set a demand ceiling alarm in your BMS
Large industrial / manufacturing plant
Compare GSA-3 vs Time-of-Use (MSB).
GSA-3 demand runs $15.14/kW with $0.08614/kWh energy; MSB offers much lower off-peak energy but high fixed/admin charges. The crossover depends on load factor and off-peak shiftability.
- Model both schedules against 12 months of demand history
- Quantify how much load can move off-peak
- Factor the $1,500 + $350 MSB fixed/admin charges
Energy consultant needing usage data
Plan for member-mediated manual data collection.
Tombigbee has no API, Green Button, or EDI. Automated ingestion is not possible; budget for manual PDF collection per meter.
- Collect a signed data release from the member
- Have the member download Orbit One PDFs monthly
- For large historical pulls, request a billing export (5-10 business days)
Small commercial account (<50 kW)
GSA-1 flat-rate service.
Below 50 kW there is no demand charge; bills are customer charge plus tiered energy, so focus on overall kWh efficiency.
- Improve lighting and HVAC efficiency
- Right-size equipment
- Enroll in paperless billing and autopay
Historical Rate Trends
Tombigbee adjusts retail rates infrequently and passes TVA wholesale changes through directly. The co-op states it is the second least expensive TVA cooperative in Mississippi.
October 1, 2022
Retail rate increase of 0.50%.
+0.50%October 1, 2023
4.0% retail increase, partly due to TVA discontinuing its Pandemic Relief Credit (~1.5% effective).
+4.0%October 1, 2025
Rate increase announced October 2025 (see TEPA notice); reflected in rates effective May 1, 2026.
Not specifiedOverall trend: Gradual increases tied to TVA wholesale costs and rising materials/equipment prices (up ~80% over recent years).
Next expected change: Future adjustments expected to track TVA wholesale rate changes and the monthly fuel cost adjustment; no specific date published beyond the October 2025 increase.
Cost Optimization Strategies
Because GSA-2/GSA-3 bills are demand-driven and energy charges are tiered, the highest-leverage actions for Tombigbee C&I customers are peak demand reduction, load-factor improvement, and (for large loads) evaluating the time-of-use MSB schedule.
Peak demand management
For: GSA-2, GSA-3
Stagger large equipment startups and cap simultaneous loads to lower the 15-minute peak that sets the ~$15-17/kW demand charge on GSA-2/GSA-3.
Load-factor improvement
For: GSA-2, GSA-3
Flatten the load curve so more kWh ride under the same demand peak, reducing effective $/kWh.
Evaluate Time-of-Use (MSB)
For: Large industrial
High-load-factor manufacturers that can shift consumption off-peak may benefit from the MSB schedule's lower off-peak energy ($0.02566-0.02847/kWh vs ~$0.086 on GSA-3).
Rate schedule audit
For: All C&I
Confirm the facility is on the lowest-cost applicable schedule for its demand profile; crossing the 50 kW or 1,000 kW thresholds changes the optimal class.
To implement these strategies, you need your 15-minute interval data. Learn how to download Tombigbee Electric Power Association interval data →
Frequently Asked Questions
Can a third-party energy consultant get automated access to our C&I usage data?▾
Not today. Tombigbee has no OAuth, Green Button Connect My Data, EDI, or API. The only path is member-mediated manual PDF export from the Orbit One portal, optionally with a signed data release form. For ongoing needs, contact TEPA at (662) 842-7635 to request a third-party authorization feature.
Is interval (15-minute) data available for demand analysis?▾
No. Tombigbee has not deployed AMI/smart meters at scale, so only monthly billing reads exist. Prepay (EasyPay) members can see daily totals via myusage.com, but no sub-daily interval data is available for any rate class.
How do we export historical bills for multiple commercial meters?▾
Consolidate the meters under one Orbit One login and download monthly PDF statements per account. There is no bulk CSV/XML export; for large historical pulls, request a billing export from member services (5-10 business days).
Which commercial rate schedule applies to our facility?▾
Tombigbee uses TVA-based General Service Administration rates: GSA-1 (under 50 kW), GSA-2 (51-1,000 kW, demand-metered), and GSA-3 (large demand, 0-1,000 kW and 1,001-5,000 kW demand blocks). Time-of-use (MSB) is available for manufacturing/large loads. Your demand level determines the schedule.
Can we shop for a competitive electricity supplier?▾
No. Mississippi has no retail choice and Tombigbee is a TVA distributor. All energy is purchased wholesale from TVA and resold at board-set rates; there is no competitive supplier market for C&I customers.
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