IOU Michigan

Consumers Energy Co - (MI)

913min
SAIDI 2023
1.37
SAIFI 2023
1,884,290
Customers

What This Utility Data Tells You

Consumers Energy Co - (MI) is an investor-owned utility operating in Michigan under EIA identifier 4254. It reports service to approximately 1,884,290 customer accounts and generated about $4.67 billion in annual electric revenue, with a service footprint spanning 500 ZIP codes. Investor ownership puts this utility under the regulatory authority of the state public utility commission, which reviews its rate requests and reliability record.

In 2023, the average Consumers Energy Co - (MI) customer experienced 913.0 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). Excluding major weather events from that total, that falls inside the typical 120–180 minute national benchmark, in line with what most U.S. distribution utilities report. The SAIFI figure, which tracks average outage events per customer, came in at 1.37 for the same period, meaning customers statistically saw about 1 distinct interruption that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 176.4 minutes; the difference from the headline 913.0 shows how much of the outage total came from weather rather than everyday grid issues.

The EIA dataset includes 4 years of continuous reporting (2020–2023) for Consumers Energy Co - (MI), which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI climbed from 510.3 to 913.0 minutes over that window, a shift that can point to worsening weather exposure or delayed grid modernization.

SAIDI

913 min per year

Mean outage duration per year (2023)

SAIFI

1.37 interruptions/yr

Events per customer (2023)

Customers

1,884,290

Customers across Michigan

SAIDI vs. National Average (180 min) 100.0%

913 minutes per customer per year

Consumers Energy Co - (MI) SAIDI

Minutes without power per year (2023)

913 SAIDI913 SAIDINat. avg 120120SAIDI913SAIDI

Below Average

Reliability Trend (2020–2023)

Year SAIDI (min) SAIDI nMED SAIFI Customers
2020 510.3 194.7 1.348 1,843,992
2021 911.2 227.9 1.601 1,857,586
2022 466.6 182.0 1.287 1,861,956
2023 913.0 176.4 1.371 1,871,372

SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.

Service Area

Consumers Energy Co - (MI) serves 500 ZIP codes in Michigan.

4811548118481334813748140481444814548157481584816148169481774818248411484144841548417484184842048421484234842948430484334843648437484384843948442484494845148457484584846048462484634846448473484764848048501485024850348504485054850648507485094851948529485314853248550485514855248553485544855548556485574860148602486034860448605486064860748608486094861048611486124861348614486154861648617486184861948620486214862248623486244862548626486274862848629486304863148632486334863448635486364863748638486404864148642486474864948650486514865248653486544865548656486574865848659486614866248663486674867048674486864870348705487064870848710487214872248724487284873048732487334873448737487384873948740487424874348745487464874748748487494875048756487574875848761487624876348765487664876848770487874880148804488054880648807488084880948811488124881348815488164881748818488194882048821488224882348827488294883048831488324883348834488354883648837488384884048841488424884348845488464884748848488494885048851488524885348854 and 300 more

Frequently Asked Questions

How reliable is Consumers Energy Co - (MI)?

Consumers Energy Co - (MI) had a SAIDI of 913.0 minutes in 2023 including major weather events, but 176.4 minutes excluding them (the IEEE-standard measure of day-to-day reliability, the gap reflects a major storm that year, not chronic performance). Excluding major storm impacts, this tracks roughly with the national average.

What type of utility is Consumers Energy Co - (MI)?

Consumers Energy Co - (MI) is classified as a IOU serving Michigan.

How many customers does Consumers Energy Co - (MI) serve?

Consumers Energy Co - (MI) serves approximately 1,884,290 customers in Michigan.

How has Consumers Energy Co - (MI)'s reliability changed over time?

Consumers Energy Co - (MI) has 4 years of reliability data (2020-2023). SAIDI has held roughly steady across these years. Review the trend table above for year-by-year detail.

Utility Profile

Type
IOU
State
Michigan
Customers
1,884,290
Annual Revenue
$4.67B
EIA ID
4254

Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer.

Every figure on PlainUtility is rendered directly from the U.S. Energy Information Administration's Form 861 reliability data, no number is typed in by an editor. This utility's SAIDI/SAIFI figures are rendered directly from EIA Form 861 reliability files. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2020-2023.