UNS Electric, Inc
Investor Owned electric utility · Arizona · #218 of 3,199 U.S. utilities by customers · EIA utility #19728
UNS Electric, Inc is a investor owned electric utility serving 107,073 customers in Arizona. In 2025 it sold 1,801 gigawatt-hours of electricity for $295.53M in revenue, an average realized rate of 16.41¢ per kWh across all customer classes and 16.99¢ per kWh for residential customers. Its reported service territory covers 2 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 95,288 | 971 | $164.86M | 16.99¢ | |
| Commercial | 11,779 | 722 | $116.21M | 16.10¢ | |
| Industrial | 6 | 109 | $14.46M | 13.32¢ | |
| Total | 107,073 | 1,801 | $295.53M | 16.41¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (849 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 102,632 | 1,841 | $189.81M | 10.53¢ |
| 2022 | 104,520 | 1,847 | $220.30M | 12.03¢ |
| 2023 | 106,045 | 1,832 | $247.87M | 13.64¢ |
| 2024 | 107,484 | 1,906 | $294.80M | 16.02¢ |
| 2025 | 107,073 | 1,801 | $295.53M | 16.99¢ |
Reliability (2025)
Average outage time (SAIDI): 81 minutes per customer per year
Average outages (SAIFI): 0.94 per customer
Average restoration time (CAIDI): 87 minutes
As reported for Arizona under the IEEE standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 793 GWh
Wholesale power purchased: 1,569 GWh
Winter peak demand: 291 MW
Energy losses: 6.4% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 95.5% of 117,663 meters
Customer-sited generation (net metering): 11,701 installations, 111.2 MW of capacity
Counties served
Mohave, AZSanta Cruz, AZ
Other large utilities in Arizona
- Arizona Public Service Co - 1,433,294 customers, residential 17.03¢
- Salt River Project - 1,188,189 customers, residential 13.98¢
- Tucson Electric Power Co - 458,898 customers, residential 14.88¢
- Trico Electric Cooperative Inc - 56,123 customers, residential 14.26¢
- Sulphur Springs Valley E C Inc - 54,786 customers, residential 14.61¢
- Navopache Electric Coop, Inc - 46,592 customers, residential 13.52¢
- Mohave Electric Cooperative, Inc. - 46,326 customers, residential 11.27¢
- Navajo Tribal Utility Authority - 43,250 customers, residential 16.41¢
All Arizona utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #19728 in the EIA frame.