Oklahoma Electric Cooperative Rate Selection Guide
Oklahoma Electric Cooperative (OEC) is a member-owned electric cooperative serving roughly 64,000 members across seven central Oklahoma counties. Members access billing and interval usage through the MyOEC (NISC SmartHub) portal with Green Button Download My Data support, and commercial members take service under published demand-based non-residential tariffs.
Oklahoma Electric Cooperative Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| SMCO2 Non-Residential | commercial | $1.75/meter/day + seasonal energy ($0.04946-$0.324179/kWh) | Small/mid commercial up to 250 kVA |
| INSD3 Large Power & Industrial | industrial | $9.09-$17.09/kW demand + $0.075445/kWh | Industrial loads 250-499 kVA |
| LP150 Large Power over 150 kW | industrial | $800/mo + $13.50/kW demand + ~$0.044/kWh | Large power loads 500-1000 kVA |
Market Overview
OEC is a not-for-profit electric cooperative governed by a member-elected board. It purchases wholesale power and distributes across member-owned lines, setting rates internally rather than through a state regulator. There is no competitive retail supplier choice; all C&I members take service under published cooperative tariffs.
Need to pull your actual usage data to compare rates? See the Oklahoma Electric Cooperative Data Access Guide →
Current Rate Schedules
OEC publishes tiered non-residential tariffs by demand level. SMCO2 serves loads up to 250 kVA with seasonal on/off-peak energy pricing; INSD3 (250-499 kVA) and LP150 (500-1000 kVA) add demand charges; accounts at 1000+ kVA are handled directly by OEC's Key Account Specialist. The figures below are verified from OEC's published rates page.
Effective: January 1, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| SMCO2 Non-Residential | commercial | Non-residential loads up to 250 kVA. | Service Availability $1.75/meter/day. Summer (Jul-Sep) energy on-peak $0.324179/kWh, off-peak $0.113179/kWh. Winter (Jan-May, Nov-Dec) first 2,000 kWh $0.1235, over 2,000 kWh $0.04946. Shoulder (Jun-Oct) on-peak $0.324179, off-peak $0.12. | — |
| INSD3 Large Power and Industrial | industrial | Loads 250-499 kVA. | Demand $17.09/kW (Jun-Oct), $9.09/kW (Nov-May). Energy $0.075445/kWh. | — |
| LP150 Large Power over 150 kW | industrial | Loads 500-1000 kVA. | Service Availability $800/meter/month. Energy first 2,000,000 kWh $0.044703/kWh, over 2,000,000 kWh $0.040703/kWh. Demand $13.50/kW, minimum billing demand 150 kW. | — |
| Large Power / Key Account (1000+ kVA) | industrial | Loads 1000+ kVA. | Custom pricing handled by OEC's Key Account Specialist (Tim Ferree, tim.ferree@okcoop.org). | — |
Rate Recommendations by Use Case
Small/mid commercial (<= 250 kVA)
Take service on SMCO2 and aggressively shift summer load off-peak to avoid the $0.324179/kWh on-peak energy charge.
SMCO2 has no separate demand charge but very high summer on-peak energy, so time-shifting summer usage is the biggest lever.
- Use Green Button data to find summer on-peak usage.
- Shift HVAC pre-cooling and process loads off-peak.
- Compare winter tiered pricing for high-usage months.
Industrial facility (250-499 kVA)
On INSD3, manage the monthly peak kW that drives the $17.09/kW summer demand charge.
Seasonal demand charges ($17.09/kW summer vs $9.09/kW winter) dominate the bill, so peak management and summer load control yield the largest savings.
- Pull interval data to identify peak intervals.
- Stagger large-motor and process start-ups.
- Concentrate flexible production in winter where possible.
Large power load (500-1000 kVA)
On LP150, manage demand against the 150 kW minimum and target the 2,000,000 kWh energy tier break.
With a $13.50/kW demand charge, a 150 kW minimum, and a tiered energy rate, both demand control and volume scheduling matter.
- Keep billed demand efficient relative to the 150 kW minimum.
- Schedule high-volume production to capture the lower >2M kWh rate.
- Engage the Key Account Specialist for optimization.
Energy consultant / aggregator
Onboard OEC members via member-initiated Green Button downloads or Nectar's API, and ask OEC about Green Button Connect My Data.
OEC has no proprietary API, EDI, or advertised CMD, so Green Button XML and Nectar's API are the supported programmatic paths.
- Request Green Button XML from the member.
- Use Nectar for programmatic billing and interval access — docs.nectarclimate.com.
- Contact OEC at (405) 321-2024 to confirm CMD availability.
Historical Rate Trends
OEC sets rates internally through its member-elected board. Current published non-residential tariffs use seasonal energy pricing and demand charges; specific dated historical change percentages are not published on the public rates page.
January 1, 2026
Current published non-residential tariffs (SMCO2, INSD3, LP150) in effect; OEC does not publish dated percentage changes on its public rates page.
n/a (structure only)Overall trend: Stable structure with seasonal (summer/winter/shoulder) energy differentials; demand charges peak in summer (Jun-Oct).
Next expected change: Not publicly announced; members should monitor okcoop.org/rates for updates.
Cost Optimization Strategies
Because OEC's larger commercial tariffs are dominated by per-kW demand charges and SMCO2 has steep summer on-peak energy pricing, C&I members save most by managing peak demand and shifting summer load off-peak.
Peak demand (kW) management
For: INSD3 and LP150 members
On INSD3 and LP150, reduce the monthly peak kW that sets the demand charge ($17.09/kW summer on INSD3, $13.50/kW on LP150) by staggering loads and limiting coincident peaks.
Summer on-peak avoidance (SMCO2)
For: SMCO2 non-residential members
Shift discretionary load out of summer on-peak hours where SMCO2 energy is $0.324179/kWh versus off-peak $0.113179/kWh.
LP150 energy tier optimization
For: LP150 members
Large accounts crossing 2,000,000 kWh/month see a lower marginal energy rate ($0.040703 vs $0.044703); align production schedules to capture tiered savings.
Interval-data-driven monitoring
For: All C&I members
Use Green Button hourly data and the MyOEC portal to identify demand spikes and verify efficiency measures.
To implement these strategies, you need your 15-minute interval data. Learn how to download Oklahoma Electric Cooperative interval data →
Frequently Asked Questions
How can a C&I member get interval data from OEC?▾
Use Green Button Download My Data in the MyOEC portal to export up to 14 months of hourly interval usage as ESPI XML, or view daily/hourly usage in the portal. 15-minute resolution may be available via the unofficial NISC SmartHub API for technical users.
Does OEC offer a third-party API or Share My Data program?▾
No. OEC does not publish a formal third-party API or Share My Data program. Consultants typically use member-initiated Green Button XML downloads or Nectar, which provides API access to billing and interval data after member authorization — see docs.nectarclimate.com. Members can ask OEC whether Green Button Connect My Data is available.
Does OEC support EDI billing for commercial accounts?▾
OEC does not publish an EDI trading partner program. Large commercial customers should contact (405) 321-2024 or the Key Account Specialist and use Green Button XML or the NISC SmartHub API as the integration alternative.
What commercial rate applies based on my demand level?▾
Non-residential members up to 250 kVA take the SMCO2 rate; 250-499 kVA take the INSD3 Large Power and Industrial rate; 500-1000 kVA take the LP150 Large Power over 150 kW rate; and 1000+ kVA accounts are handled by OEC's Key Account Specialist.
How are OEC commercial demand charges structured?▾
Demand charges are based on the highest level of demand during the billing period. For example, INSD3 bills $17.09/kW June-October and $9.09/kW November-May, while LP150 bills $13.50 per kW with a 150 kW minimum billing demand.
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