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 a 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. As an investor-owned utility, it operates under state public utility commission oversight that reviews rate cases and reliability performance.

In 2023, the average Consumers Energy Co - (MI) customer experienced 913.0 minutes of power interruptions — a metric called SAIDI (System Average Interruption Duration Index). That is substantially above the 120–180 minute national benchmark, indicating either storm-prone geography, aging infrastructure, or extended restoration windows. SAIFI — the average number of outage events per customer — was 1.37 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 176.4 minutes — the gap between that figure and the headline 913.0 reveals how much weather, not day-to-day infrastructure, drove outages.

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 has increased from 510.3 to 913.0 minutes, which may reflect either worsening weather exposure or delayed grid modernization. All figures on this page come directly from EIA Form 861, the federal annual electric power industry survey, with service territory ZIPs sourced from OpenEI — you can cross-reference them with your own utility bill or use them when comparing providers before relocating.

SAIDI

913 min per year

Average outage minutes (2023)

SAIFI

1.37 interruptions/yr

Outage frequency (2023)

Customers

1,884,290

Served in 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, meaning the average customer experienced about 913 minutes of outages that year. This is above the national average, indicating below-average reliability.

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

Consumers Energy Co - (MI) is classified as a IOU serving Michigan. Investor-owned utilities (IOUs) are for-profit companies regulated by state public utility commissions.

What does SAIDI mean for Consumers Energy Co - (MI)?

SAIDI (System Average Interruption Duration Index) measures the average total minutes per year that a customer of Consumers Energy Co - (MI) experiences power outages. A lower SAIDI indicates better reliability. The national average is roughly 120-180 minutes per year, so comparing Consumers Energy Co - (MI)'s SAIDI to that benchmark shows whether this utility is above or below average.

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

Consumers Energy Co - (MI) serves approximately 1,884,290 customers in Michigan. Customer count can affect reliability metrics because larger utilities may face different infrastructure challenges compared to smaller ones.

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 remained relatively stable over this period. Review the trend table above for year-by-year detail.

What is SAIDI without major event days?

SAIDI "without major event days" (SAIDI nMED) excludes outages caused by hurricanes, ice storms, and other catastrophic weather events. It better reflects day-to-day infrastructure reliability rather than vulnerability to extreme weather. Both standard SAIDI and SAIDI nMED are shown in the reliability trend table above.

Utility Profile

Type
IOU
State
Michigan
Customers
1,884,290
Annual Revenue
$4.67B
EIA ID
4254
Data Source: U.S. Energy Information Administration Form 861 annual electric power industry survey. ZIP service territory from OpenEI.

Related

Data sourced from official EIA reliability statistics and OpenEI utility rate database. See our methodology for details. Retrieved and formatted by PlainUtility Editorial

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the U.S. Energy Information Administration (EIA) Form 861. Consult a qualified professional before making decisions based on this data.