How the two plans work
TRRES: Residential Service Basic
- In July the first 500 kWh a month cost 15.0¢ each; then 17.1¢ above 500 kWh a month, then 15.2¢ above 549 kWh a month, then 15.9¢ above 1,000 kWh a month.
- An average Arizona home (1,711 kWh in July) goes past the first tier, so extra load such as an EV is priced higher.
- Fixed charge: $15.28 a month.
TRREST: Residential Service Time-of-Use
- Peak 3 pm–7 pm on July weekdays; 4 of 24 hours carry the top price of 21.5¢.
- The cheapest July weekday hour costs 14.3¢, so moving 1 kWh out of the top hours saves 7.2¢.
- January weekdays range from 13.9¢ to 14.8¢.
- Summer pricing applies May–Sep; winter pricing Oct–Apr.
- Weekends follow a different schedule from weekdays.
- Fixed charge: $12.23 a month.
Your own pattern of use decides the winner: compare every TEP plan on your usage, or see all TEP plans, sources and peak hours.