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Tariff data · 2026-08-26
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.
HouseholdUsesPer yearWorks out to
Apartment

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

4,866 kWh$89318.3¢ / kWh
Family home

Three or four people with central air conditioning

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

Same house, plus an electric car charging overnight

13,103 kWh$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.

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