Sun River Electric Co-op electricity rates
Electric cooperative · Montana
Sun River Electric Co-op is a member-owned electric cooperative, so its customers own it and elect its board, serving 6,300 homes in Montana. Its residential customers pay an average of 14.31¢/kWh including fixed and delivery charges, 20% less 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. This utility files EIA's short form, which reports total sales only, so the rate covers all customer classes.
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Sun River Electric Co-op bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $71.55 | $79.60 |
| 1,000 kWh | $143.10 | $126.20 |
| 1,500 kWh | $214.65 | $172.80 |
| 2,000 kWh | $286.20 | $219.40 |
*Residential Green Energy (effective 2015-01-01, $33.00/month customer charge), energy and fixed charges from the OpenEI Utility Rate Database. Riders, fuel adjustments and taxes are often billed separately, so real bills usually land closer to the all-in column. Calculate your bill.
Sun River Electric Co-op residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| Residential Green Energy | 2015-01-01 | $33.00 | 9.32¢ |
| Residential | 2015-01-01 | $33.00 | 9.07¢ |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Sun River Electric Co-op rate history
2015–2025: +2% change in the average residential rate (13.21¢ → 13.42¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2019 | Sun River Electric Co-op | Montana avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 79 | 285 | 266 |
| Outages per customer (SAIFI) | 1.33 | 1.34 | |
| Outage minutes excluding major storms | 79 | 136 | 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 Sun River Electric Co-op's counties, customers averaged 6 hr 26 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Chouteau | 1,246 | 19 | 1,793 | 2025-12-17 |
| Judith Basin | 870 | 17 | 508 | 2025-01-08 |
| Liberty | 859 | 8 | 1,507 | 2025-12-18 |
| Pondera | 677 | 14 | 4,355 | 2025-12-17 |
| Lewis and Clark | 506 | 35 | 12,309 | 2025-06-03 |
| Teton | 253 | 12 | 1,216 | 2025-12-17 |
| Cascade | 247 | 39 | 3,633 | 2025-12-17 |
| Toole | 0 | 0 | 0 | 2025-01-01 |
Sun River Electric Co-op service area
Sun River Electric Co-op serves 8 counties in Montana and 15 ZIP codes.
Cascade, Chouteau, Judith Basin, Lewis and Clark, Liberty, Pondera, Teton, Toole
Cities: Helena, Helena Valley West Central, Shelby, Helena West Side
Programs, smart meters & solar
| Smart meters (AMI) for homes | 100% |
| Time-based rate programs | None reported |
| Net-metered solar homes | 0 reported |
Sun River Electric Co-op at a glance
| Ownership | Electric cooperative |
| Services | — |
| Retail revenue (2025) | $13,509,900 |
| Electricity sold (2025) | 100,685 MWh |
| Balancing authority | WAUW |
| EIA utility ID | 18401 |
Other utilities in Montana
Frequently asked questions
What is Sun River Electric Co-op's electricity rate?
Sun River Electric Co-op residential customers pay an average of 14.31¢ 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 3% above the Montana average of 13.84¢ and 20% below the U.S. average.
What is the average Sun River Electric Co-op electric bill?
About $191 a month. The average Sun River Electric Co-op home uses 1,332 kWh a month. At 1,000 kWh the bill would be about $143.
How many customers does Sun River Electric Co-op have?
Sun River Electric Co-op serves 6,300 residential customers in Montana, across 8 counties.
How reliable is Sun River Electric Co-op?
In 2019, the average Sun River Electric Co-op customer was without power for 79 min (SAIDI) over undefined interruptions (SAIFI), including major storms. Excluding major event days it was 79 min. The Montana average was 4 hr 45 min and the U.S. average 4 hr 26 min.
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 Sun River Electric Co-op before making decisions.