Skip to content
Tariff data · 2026-08-27
← DTE Electric Company · MI

Water Heating Service Rate D5 Option 1 (Retail Service Residential)

Does the hour matter on Water Heating Service Rate D5 Option 1? No — one rate, every hour of the year.

  • off-peak13.93¢

There is no peak and no off-peak here: 13.93¢ per kilowatt-hour at 3am is the same as at 6pm, on a Sunday as on a Tuesday, in July as in January. Moving laundry or car charging to another time of day will not change this bill by a cent. What does change it is how much you use, and the fixed charge below, which you pay whether you use anything or not.

What does Water Heating Service Rate D5 Option 1 cost a year?

This does not look like an ordinary household tariff — it is a “Water Heating Service Rate D5 Option 1 (Retail Service” — a tariff for one appliance, not a whole home. 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$60$71614.7¢ / kWh
Family home

Three or four people with central air conditioning

9,453 kWh$113$1,35514.3¢ / kWh
Home with an EV

Same house, plus an electric car charging overnight

13,103 kWh$155$1,86314.2¢ / 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-peak13.93¢midnight–midnight

Plus a fixed charge of $3.2 per month.

Should you be on Water Heating Service Rate D5 Option 1?

One rate, every hour of the year. That makes this plan predictable and nothing else: there is no cheap window to move laundry or car charging into, and no penalty for running the oven at six in the evening. Predictability is worth something if your schedule is not yours to control — but if it is, a flat rate is the one structure that guarantees you cannot benefit from it.

Before a single kilowatt-hour moves, this plan charges $38 a year in fixed fees. On the apartment above that is 5% of the whole bill; on the house with a car charging in it, 2%. 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.

Expect the bill to move with the calendar. The same family home costs about $156 in July and $86 in February — a $70 spread driven by heating and cooling far more than by anything you chose. Budget against the July figure, not the average, and a summer bill stops being a surprise.

Other DTE Electric plans

Who can be on DTE Electric’s Water Heating Service Rate D5 Option 1 (Retail Service Residential)?

Eligibility is not our judgement — it is written into the tariff DTE Electric filed. This is what that document says:

Available to customers using hot water for sanitary purposes (other uses subject to the approval of the Company) and taking service under Residential and General Service Rate Schedules. Options I and III are also available to customers with solar assisted hot water heaters.

Shortened — the clause runs longer in the filing. Quoted from the filed tariff. Your utility decides eligibility, not us; check with them before you switch.

If this is new to you

Where this comes from

Effective
2026-04-01

the date this tariff took effect

Covers
delivery + supply

the ZIP-code service map lists this territory as bundled, so the utility sells delivery and supply together

Enrollment
open to new customers

Tariff document: https://www.michigan.gov/-/media/Project/Websites/mpsc/consumer/rate-books/electric/dte/dtee1cur.pdf?rev=e0168ab41b8245bba5f3ca7631c29614