Charleston County, South Carolina Power Outages, 2015 to 2023

Charleston County, South Carolina had 14 major outages from 2015 to 2023

Above middle outage time among US counties

Residents here averaged 1.30 times the US outage time per person and 1.38 times the South Carolina rate. It ranks 15 of 46 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

1.6major outages per year

9 of 9years with a major outage

117 hrslongest major outage

Sep, Octhardest months

September and October made up 83% of this county's outage time. The largest outage on record began Sep 4, 2019, reached 137,536 customers, and left at least 200 customers out for 98.0 hours.

Outage time per resident, rated South Carolina counties

MostLeast

Outage impact by year

Customer-hours without power. 1,000 customers out for 2 hours is 2,000 customer-hours.

2015'152016'162017'172018'182019'192020'202021'212022'222023'23

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	298,784	182	1
2016	3,539,442	91	2
2017	1,219,004	194	1
2018	371,831	289	2
2019	4,806,729	231	3
2020	314,182	193	1
2021	362,294	197	1
2022	1,084,939	212	2
2023	314,338	241	1

When outages hit

Share of this county's customer-hours by month.

20%

40%

60%

80%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Sep 4, 2019	98.0	137,536	4,491,176
Oct 8, 2016	117.0	79,454	2,773,466
Sep 11, 2017	83.5	62,562	1,019,322
Sep 30, 2022	52.2	77,760	812,299
Oct 7, 2016	19.8	97,936	674,844

Hours measure how long at least 200 customers in the county were out. Most customers get power back sooner.

Size your backup battery

Start with what you would keep running. Wattages are typical averages, so check your own appliances.

Phones, Wi-Fi, lights, about 60 WRefrigerator, about 60 WChest freezer, about 40 WGas furnace fan, about 160 W

Hours to cover: 24

1,700 Whof battery capacity, allowing for about 15% conversion loss

If anyone relies on medical equipment, plan that with their provider. Run portable fuel generators outdoors only, at least 20 feet from doors, windows and vents. See the outage checklist.

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How to read this

A major outage lasted at least 8 hours and reached customers equal to at least 1% of county residents.
Records cover outages of at least 200 customers in a county. They do not show what happened on your street.
Utilities that do not report can make a county look better than it is. Data ends in 2023. Read the full method.