Skip to content
Tariff data · 2026-08-27
← Potomac Electric Power Co · MD

Residential Apartments-Master Meter-Schedule MMA

When does peak hit on Potomac Electric Power Co’s Residential Apartments-Master Meter-Schedule MMA? The hour never matters here — only the season. Rates peak November–May.

  • off-peak7.33¢
Weekdays
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Weekends
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Weekends are off-peak all day — the cheapest time to run anything you can schedule.

What does Residential Apartments-Master Meter-Schedule MMA cost a year?

This does not look like an ordinary household tariff — the tariff is named “Master Meter”. The utility files it under its residential sector, but the estimates below assume a normal home, so they may not describe what this service is for. We leave it out of the plan-to-plan comparisons for that reason.
HouseholdUsesA monthPer yearWorks out to
Apartment

One or two people, no central air, no electric heat

4,866 kWh$74$89318.3¢ / kWh
Family home

Three or four people with central air conditioning

9,453 kWh$145$1,74318.4¢ / kWh
Home with an EV

Same house, plus an electric car charging overnight

13,103 kWh$202$2,42518.5¢ / kWh

Estimates, not quotes. We run three made-up but realistic households through this tariff hour by hour for a full year — including the way air conditioning loads the afternoon and an EV loads the small hours. Your own bill depends on when you actually use electricity, which is exactly the thing a per-kWh number hides.

What you actually pay

PeriodRateApplies when
off-peak7.33¢ up to 30 kWh18.14¢midnight–midnight, June–October
off-peak7.33¢ up to 30 kWh19.10¢midnight–midnight, November–May

Plus a fixed charge of $2.01 per month.

Should you be on Residential Apartments-Master Meter-Schedule MMA?

The hour of day does not change what you pay here — the month does. Running the same house through the full year, July costs about $198 and February about $113. That $86 swing is part rate and part weather, and it is the reason a budget built on your spring bill will break in July.

There is a usage cliff to watch. The first 30 kWh each month are billed at 7.3¢; past that line the rate steps up to 19.1¢ — 160% more for every unit after. The last kilowatt-hour of a heavy month is the expensive one, which is why cutting a little off a big month saves more than cutting the same amount off a small one.

Before a single kilowatt-hour moves, this plan charges $24 a year in fixed fees. On the apartment above that is 3% of the whole bill; on the house with a car charging in it, 1%. Fixed charges are invisible in a cents-per-kWh comparison and they punish small users hardest — if you use very little electricity, the headline rate is the least important number on this page.

Other Potomac Electric Power plans

If this is new to you

Where this comes from

Effective
2025-08-01

the date this tariff took effect

Covers
delivery + supply

Generation + Transmission + Distribution + Procurement Cost Adjustment

Enrollment
open to new customers

Tariff document: https://www.pepco.com/cdn/assets/v3/assets/bltbb7c204688a1a6a8/blt1592c0ff5185f738/6838a59f7476148e7ae7d25a/DC_PCA_SOS_Current_Tariff_Eff_6.1.2025.pdf?branch=prod_alias