Cooperative · Georgia · EIA 7090
GreyStone Power Corporation
Cooperative · Georgia · 148K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 197 minutes/customer.
Reliability verdict
GreyStone Power Corporation shows near-benchmark chronic reliability in 2023: 105 minutes SAIDI excluding major events across 148K customers.
- 197 min
- SAIDI 2023
- 1.96
- SAIFI 2023
- 105 min
- SAIDI ex-MED
- 148K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: mid-cohort SAIDI between the 96 and 258 minute tercile cuts.
What mid-pack GreyStone Power Corporation filings show
GreyStone Power Corporation is a member-owned electric cooperative operating in Georgia under EIA identifier 7090. It reports service to approximately 147,547 customer accounts and generated about $0.34 billion in annual electric revenue, with a service footprint spanning 26 ZIP codes. As a cooperative, its governance is accountable to its ratepayer-members rather than shareholders, which often shapes rate-setting and reinvestment priorities.
In 2023, the average GreyStone Power Corporation customer experienced 196.8 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). That sits within the 120–180 minute national benchmark range, indicating performance typical of U.S. distribution utilities. Over the same period, SAIFI (outage events per customer) was 1.96, putting the typical customer at roughly 2 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 105.0 minutes, the gap between that figure and the headline 196.8 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for GreyStone Power Corporation, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 803.1 to 196.8 minutes over that window, a meaningful direction for prospective customers and regulators watching capital investment outcomes.
Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.
197 min/year per customer
Annual minutes without electric service (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for GreyStone Power Corporation from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
GreyStone Power Corporation SAIDI trend
GreyStone Power Corporation vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
197 Around the middle fewer outage minutes than 43% of 911 utilities
Utilities nationwide, banded by latest reported SAIDI (minutes)
Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. EIA Form 861 reliability filings · August 2026
Price vs. reliability
Where GreyStone Power Corporation sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, GreyStone Power Corporation charges more per customer than 35% of them, and is more reliable (lower SAIDI) than 47% of them, placing it in the quadrant where it pays less and is less reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,294/year · Latest SAIDI: 196.8 minutes/year.
SAIDI 2023 breakdown: 196.8 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 803.1 | 93.7 | 2.395 | 135,650 |
| 2021 | 174.5 | 91.6 | 1.698 | 138,609 |
| 2022 | 118.3 | 79.5 | 1.474 | 141,487 |
| 2023 | 196.8 | 105.0 | 1.960 | 144,827 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
GreyStone Power Corporation serves 26 ZIP codes in Georgia.
Frequently Asked Questions
How reliable is GreyStone Power Corporation?
GreyStone Power Corporation had a SAIDI of 196.8 minutes in 2023. Excluding major storm impacts, this tracks roughly with the national average.
What type of utility is GreyStone Power Corporation?
GreyStone Power Corporation is classified as a Cooperative serving Georgia.
How many customers does GreyStone Power Corporation serve?
GreyStone Power Corporation serves approximately 147,547 customers in Georgia.
How has GreyStone Power Corporation's reliability changed over time?
GreyStone Power Corporation 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
- Cooperative
- State
- Georgia
- Customers
- 147,547
- Annual Revenue
- $0.34B
- EIA ID
- 7090
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for GreyStone Power Corporation. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.
Similar customer count
Nearest utilities by Form 861 customers (148K here), outside Georgia.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (196.8 here), outside Georgia, excluding the customer-peer set.
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 · methodology.