HomeWattCost

Middle Tennessee Electric RS vs NITEFLEX

For a typical Tennessee home using 1,186 kWh a month, RS is cheaper by about $34 a year ($150 against $153 a month). RS 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 Middle Tennessee ElectricTariffs checked 2026-11-03Typical use 1,186 kWh/mo, Tennessee

Head to head

ScenarioRSNITEFLEXCheaper
Typical home, per month$150$153RS
All-in price per kWh12.7¢12.9¢RS
Home + EV, charged at the cheapest hour$180$175NITEFLEX
Home + EV, plugged in at 6 pm$180$186RS
Fixed charge$21.81$21.81

Typical home: Tennessee 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 NITEFLEX.

Month by month

Typical-home bill each month on each plan.

PlanJanFebMarAprMayJunJulAugSepOctNovDec
RS$170$195$129$121$119$151$184$188$150$126$116$154
NITEFLEX$171$198$131$124$122$155$188$192$154$129$117$156

RS: price by hour

July weekday.

Same price all day
10.8¢12a3a6a9a12p3p6p9p12a

NITEFLEX: price by hour

July weekday.

Off-peakPeak
7.8¢11.8¢7.8¢12a3a6a9a12p3p6p9p12a

RS or NITEFLEX: common questions

Is RS or NITEFLEX cheaper?

For a typical Tennessee home using 1,186 kWh a month, RS is cheaper by about $34 a year ($150 against $153 a month). RS 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, NITEFLEX gives the lower total ($175 against $180 a month).

What is the difference between RS and NITEFLEX?

RS is flat: the same price at every hour, with a fixed charge of $21.81 a month. NITEFLEX is time-of-use (summer weekdays: Peak 4 am–10 pm; lowest price 10 pm–4 am next day), with a fixed charge of $21.81 a month.

How the two plans work

RS: Residential

  • One price per kWh at every hour, all year: 10.8¢.
  • Shifting use to other hours changes nothing on this plan; using less is the only lever.
  • Fixed charge: $21.81 a month.

NITEFLEX: Time-of-Use Residential — NiteFlex

  • Peak 4 am–10 pm on July weekdays; 18 of 24 hours carry the top price of 11.8¢.
  • The cheapest July weekday hour costs 7.8¢, so moving 1 kWh out of the top hours saves 4.0¢.
  • January weekdays range from 7.8¢ to 11.8¢.
  • Fixed charge: $21.81 a month.

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