HomeWattCost

KU RS vs RTOD-Energy

For a typical Kentucky home using 1,107 kWh a month, RTOD-Energy is cheaper by about $35 a year ($137 against $140 a month). RTOD-Energy stays cheaper at every level of use from 200 to 2,500 kWh a month with the same daily pattern of use.

Utility KUTariffs checked 2026-09-28Typical use 1,107 kWh/mo, Kentucky

Head to head

ScenarioRSRTOD-EnergyCheaper
Typical home, per month$140$137RTOD-Energy
All-in price per kWh12.7¢12.4¢RTOD-Energy
Home + EV, charged at the cheapest hour$171$158RTOD-Energy
Home + EV, plugged in at 6 pm$171$169RTOD-Energy
Fixed charge$17.48$17.48

Typical home: Kentucky 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 any hour on RS, 12 am on RTOD-Energy.

Month by month

Typical-home bill each month on each plan.

PlanJanFebMarAprMayJunJulAugSepOctNovDec
RS$180$167$121$107$112$142$172$164$129$112$115$160
RTOD-Energy$190$179$129$93$104$130$158$150$119$101$122$172

RS: price by hour

July weekday.

Same price all day
11.1¢12a3a6a9a12p3p6p9p12a

RTOD-Energy: price by hour

July weekday.

Off-peakPeak
7.5¢23.6¢7.5¢12a3a6a9a12p3p6p9p12a

How the two plans work

RS: Residential Service

  • One price per kWh at every hour, all year: 11.1¢.
  • Shifting use to other hours changes nothing on this plan; using less is the only lever.
  • Fixed charge: $17.48 a month.

RTOD-Energy: Residential Time-of-Day Energy

  • Peak 2 pm–6 pm on July weekdays; 4 of 24 hours carry the top price of 23.6¢.
  • The cheapest July weekday hour costs 7.5¢, so moving 1 kWh out of the top hours saves 16.1¢.
  • January weekdays range from 7.5¢ to 23.6¢.
  • Weekends follow a different schedule from weekdays.
  • Fixed charge: $17.48 a month.

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