HomeWattCost

Evergy Missouri West RPKA vs RTOU

For a typical Missouri home using 1,041 kWh a month, RPKA is cheaper by about $83 a year ($140 against $146 a month). RPKA is cheaper or about the same at every level of use from 200 to 2,500 kWh a month, with the same daily pattern of use.

Utility Evergy Missouri WestTariffs checked 2026-09-28Typical use 1,041 kWh/mo, Missouri

Head to head

ScenarioRPKARTOUCheaper
Typical home, per month$140$146RPKA
All-in price per kWh13.4¢14.1¢RPKA
Home + EV, charged at the cheapest hour$168$162RTOU
Home + EV, plugged in at 6 pm$173$210RPKA
Fixed charge$12.90$12.90

Typical home: Missouri 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 12 am on RPKA, 12 am on RTOU.

Month by month

Typical-home bill each month on each plan.

PlanJanFebMarAprMayJunJulAugSepOctNovDec
RPKA$153$129$110$97$104$171$216$199$155$102$104$136
RTOU$169$141$118$102$120$170$211$196$155$113$110$151

RPKA: price by hour

July weekday.

Off-peakMid-peakPeak
14.0¢15.1¢16.2¢15.1¢12a3a6a9a12p3p6p9p12a

RTOU: price by hour

July weekday.

Off-peakMid-peakPeak
6.4¢11.4¢31.6¢11.4¢12a3a6a9a12p3p6p9p12a

RPKA or RTOU: common questions

Is RPKA or RTOU cheaper?

For a typical Missouri home using 1,041 kWh a month, RPKA is cheaper by about $83 a year ($140 against $146 a month). RPKA is cheaper or about the same 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, RTOU gives the lower total ($162 against $168 a month).

What is the difference between RPKA and RTOU?

RPKA is time-of-use (summer weekdays: Mid-peak 6 am–4 pm, Peak 4 pm–8 pm, Mid-peak 8 pm–12 am; lowest price 12 am–6 am), with a fixed charge of $12.90 a month. RTOU is time-of-use (summer weekdays: Mid-peak 6 am–4 pm, Peak 4 pm–8 pm, Mid-peak 8 pm–12 am; lowest price 12 am–6 am), with a fixed charge of $12.90 a month.

How the two plans work

RPKA: Residential Peak Adjustment Service (Default Time Based Plan)

  • Mid-peak 6 am–4 pm, Peak 4 pm–8 pm, Mid-peak 8 pm–12 am on July weekdays; 4 of 24 hours carry the top price of 16.2¢.
  • The cheapest July weekday hour costs 14.0¢, so moving 1 kWh out of the top hours saves 2.2¢.
  • January weekdays range from 8.5¢ to 9.9¢.
  • Summer pricing applies Jun–Sep; winter pricing Oct–May.
  • Fixed charge: $12.90 a month.

RTOU: Residential Service Time of Use - Three Period (Nights and Weekends Plan)

  • Mid-peak 6 am–4 pm, Peak 4 pm–8 pm, Mid-peak 8 pm–12 am on July weekdays; 4 of 24 hours carry the top price of 31.6¢.
  • The cheapest July weekday hour costs 6.4¢, so moving 1 kWh out of the top hours saves 25.2¢.
  • January weekdays range from 5.5¢ to 25.9¢.
  • Summer pricing applies Jun–Sep; winter pricing Oct–May.
  • Weekends differ: Mid-peak 6 am–12 am.
  • Fixed charge: $12.90 a month.

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