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APS R-EV vs R-1 (Tier 2)

For a typical Arizona home using 1,054 kWh a month, R-1 (Tier 2) is cheaper by about $67 a year ($193 against $199 a month). R-1 (Tier 2) is cheaper at every level of use from 200 to 2,500 kWh a month, with the same daily pattern of use.

Utility APSTariffs checked 2026-09-28Typical use 1,054 kWh/mo, Arizona

Head to head

ScenarioR-EVR-1 (Tier 2)Cheaper
Typical home, per month$199$193R-1 (Tier 2)
All-in price per kWh18.8¢18.3¢R-1 (Tier 2)
Home + EV, charged at the cheapest hour$231$239R-EV
Home + EV, plugged in at 6 pm$277$239R-1 (Tier 2)
Fixed charge$13.94$13.94

Typical home: Arizona average use by month (EIA), shaped hour by hour (NREL ResStock), before taxes. EV: Tesla Model Y Long Range AWD, 1,000 miles a month; cheapest start 10 am on R-EV, any hour on R-1 (Tier 2).

R-EV is an EV or electrification rate: check the eligibility rules on APS’s tariff before switching.

Month by month

Typical-home bill each month on each plan.

PlanJanFebMarAprMayJunJulAugSepOctNovDec
R-EV$135$117$156$153$209$278$321$335$250$172$128$129
R-1 (Tier 2)$143$123$160$155$193$259$303$316$234$162$132$137

R-EV: price by hour

July weekday.

Off-peakMid-peakPeak
11.2¢15.0¢39.5¢15.0¢11.2¢12a3a6a9a12p3p6p9p12a

R-1 (Tier 2): price by hour

July weekday.

Same price all day
16.8¢12a3a6a9a12p3p6p9p12a

R-EV or R-1 (Tier 2): common questions

Is R-EV or R-1 (Tier 2) cheaper?

For a typical Arizona home using 1,054 kWh a month, R-1 (Tier 2) is cheaper by about $67 a year ($193 against $199 a month). R-1 (Tier 2) is cheaper at every level of use from 200 to 2,500 kWh a month, with the same daily pattern of use. Adding an EV driven 1,000 miles a month and charged at each plan’s cheapest hour, R-EV gives the lower total ($231 against $239 a month).

What is the difference between R-EV and R-1 (Tier 2)?

R-EV is time-of-use (summer weekdays: Mid-peak 5 am–4 pm, Peak 4 pm–7 pm, Mid-peak 7 pm–11 pm; lowest price 11 pm–5 am next day), with a fixed charge of $13.94 a month. R-1 (Tier 2) is tiered: the price per kWh rises with monthly use, with a fixed charge of $13.94 a month.

More APS comparisons

How the two plans work

R-EV: Electric Vehicle Time-of-Use

  • Mid-peak 5 am–4 pm, Peak 4 pm–7 pm, Mid-peak 7 pm–11 pm on July weekdays; 3 of 24 hours carry the top price of 39.5¢.
  • The cheapest July weekday hour costs 11.2¢, so moving 1 kWh out of the top hours saves 28.3¢.
  • January weekdays range from 6.2¢ to 37.5¢.
  • Summer pricing applies May–Oct; winter pricing Nov–Apr.
  • Weekends differ: Mid-peak 12 am–12 am.
  • Fixed charge: $13.94 a month.

R-1 (Tier 2): Fixed Energy Charge Plan, Medium (Tier 2)

  • In July the first 401 kWh a month cost 17.4¢ each; then 16.8¢ above 401 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: $13.94 a month.

Your own pattern of use decides the winner: compare every APS plan on your usage, or see all APS plans, sources and peak hours.