San Diego, Texas electricity: AEP Texas Central wires, 2 split ZIP codes to check
4,076 home meters, 1,253 households, 2 ZIP codes: San Diego on AEP Texas Central's wires, ZIP by ZIP.
Reviewed by Brent Ward, founder, on 2026-10-19. Updated .
San Diego at a glance: 4,076 San Diego-addressed homes in ERCOT's Oct. 5 extract: 2,364 on AEP Texas Central; 1,712 on Nueces Electric Cooperative. 2 split ZIP codes (78384, 78332) hold 4,076 of San Diego's 4,076 placed homes (100%); those addresses need a lookup.
San Diego wires and choice
AEP Texas Central outages: aeptexas.com/outages. AEP Texas Central · Nueces Electric Cooperative
2 split ZIP codes (78384, 78332) hold 4,076 of San Diego's 4,076 placed homes (100%); those addresses need a lookup.
Non-choice utilities listed by EIA (2024) for Duval · Jim Wells: 2.
Moving to San Diego
Local numbers for setting up a home in San Diego, each checked on the official source. More contacts, and a printable list, are on San Diego helpful move-in information.
- Water and utility billing: San Diego Municipal Utility District: water customer service, 361-279-3357.
- Natural gas: CenterPoint Energy: gas leak emergency (24/7), 888-876-5786.
- Public schools: San Diego ISD.
- Driver license: Texas DPS Driver License Office: Alice, 512-424-2600.
You enter your address on the next screen, and we confirm there whether you can choose an electricity provider at that address.
Have a High Light Bill or Electric Bill?
If your electricity bill in San Diego came in higher than you expected, upload or enter it and see whether another plan could lower your electricity costs, or whether staying where you are makes more sense.
Weather and electricity in San Diego
Typical weather near San Diego, from the nearest NOAA station with a complete 1991-2020 record: Alice, about 11 miles from the city center (station elevation 201 ft). These are normals for that station, not readings at your address. August is the warmest month on average, with a normal daily high of 97°F; January has the coolest average low, 47°F. Average daily highs reach 90°F or more in May to September. No month averages a daily low at or below freezing.
For electricity, the normals point to two seasons that can lift a household's usage: cooling-degree days (a measure of how far each day's mean temperature sits above 65°F) peak in August at 676 for the month, and heating-degree days (below 65°F) peak in January at 258. How much that matters to a bill depends on the home, its insulation, its heating fuel and the household, so use your own usage history, not a regional average, when you compare plans.
| Month | Avg high °F | Avg low °F | Precipitation (in) | Cooling degree-days | Heating degree-days |
|---|---|---|---|---|---|
| Jan | 68 | 47 | 1.3 | 28 | 258 |
| Feb | 73 | 52 | 1.4 | 65 | 134 |
| Mar | 79 | 58 | 1.7 | 161 | 61 |
| Apr | 86 | 64 | 1.0 | 301 | 10 |
| May | 90 | 71 | 3.5 | 478 | 1 |
| Jun | 96 | 75 | 2.3 | 612 | 0 |
| Jul | 97 | 76 | 2.5 | 673 | 0 |
| Aug | 97 | 76 | 2.6 | 676 | 0 |
| Sep | 93 | 73 | 5.3 | 533 | 0 |
| Oct | 87 | 65 | 2.7 | 346 | 10 |
| Nov | 77 | 56 | 1.6 | 139 | 87 |
| Dec | 71 | 50 | 1.3 | 60 | 209 |
Historical weather records for Duval County
The Texas Railroad Commission's county table lists a record low of 12°F (1989) and a record high of 116°F (1998), and a regional estimate of 12 consecutive hours as a typical longest freezing or frozen-precipitation period for Duval County. These are historical county extremes, not San Diego's monthly averages and not a forecast; the normals above describe ordinary months.
Reference only: the U.S. Energy Information Administration's 2020 Residential Energy Consumption Survey puts the average Texas household at about 13,440 kWh a year (about 1,120 kWh a month if spread evenly). That is a statewide average for 2020, not San Diego, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00410144; Texas Railroad Commission, Historical Weather Data by County (2022).
San Diego electricity, in numbers and sources
- Land: 1.9 sq mi; 1,843 residents and 659 households per sq mi; 2.80 people per San Diego household. [Gazetteer; PEP; ACS]
- Heating fuel, San Diego homes (ACS 2020-2024): electricity 78.0% (±8), utility gas 18.6%; Duval County overall: 88.3% electric. All-electric homes feel winter rates more. [ACS]
- Of San Diego homes paying a power bill, 44.1% report $250 or more a month and 13.1% under $100 (Duval County: 47.4% at $250+). [ACS]
- Housing stock: 81.7% detached houses, 4.8% in 5+ unit buildings, 9.1% mobile homes; median year built 1969, 1.2% built 2010 or later. [ACS]
- ERCOT status split for 7,039 San Diego home meters (Oct. 5, 2026): active 4,076, inactive 919, de-energized 2,044; idle share 42.1%. [ERCOT]
- ACS 2020-2024: 27.8% of San Diego housing units vacant (±9), with 20.1% of vacant units held for seasonal use. Vacant homes keep meters that are not counted as households. [ACS]
- 4,076 home meters use the San Diego postal name, against 1,253 households inside city limits (3.25 per household): the mailing area runs well past the boundary. [ERCOT; ACS]
- 78384 carries 4,018 of 4,076 San Diego-addressed homes (99%); ratio across the whole ZIP 2.50, from 4,030 home meters in all and 1,610 households. [ERCOT; ACS]
San Diego homes: heating fuel, bills, housing
| San Diego | Estimate |
|---|---|
| Heat with electricity | 78.0% |
| Heat with utility gas | 18.6% |
| Bill $250 or more | 44.1% |
| Built 2010 or later | 1.2% |
| Renter households | 28.5% |
| Median year built | 1969 |
ACS 2020-2024, the city (Census boundary). Bill rows are shares of homes that pay an electric bill.
San Diego meters and households
| Count | San Diego |
|---|---|
| Residents, July 2025 | 3,503 |
| Residents, 2020 base | 3,744 |
| Households (ACS) | 1,253 |
| Active home meters | 4,076 |
| Inactive home meters | 919 |
| De-energized home meters | 2,044 |
| Active small-business meters | 555 |
| Active large-business meters | 2 |
| Home meters per household | 3.25 |
| ZIP codes listed | 2 |
| Split ZIP codes | 2 |
| Counties | Duval / Jim Wells |
ERCOT report 203, Oct. 5, 2026 (San Diego postal city) and Census. CSV · Method
San Diego plan prices, October 19, 2026
Median fixed-rate Power to Choose listings. AEP Texas Central (164 listings): 12.7¢ / 12.1¢ / 12¢ per kWh at 500 / 1,000 / 2,000 kWh, delivery 5.6898¢ + $3.24/mo included. Not a quote.
San Diego ZIP codes, row by row
Not every address in these ZIP codes has retail choice; check your exact address.
| ZIP code | San Diego homes | All ZIP homes | San Diego share | ZIP households | Share of San Diego land | Meters per household | Flags |
|---|---|---|---|---|---|---|---|
| 78384 | 4,018 | 4,030 | 100% | 1,610 | 100% | 2.50 | split, 2 wires firms |
| 78332 | 58 | 11,373 | 1% | 8,946 | 0% | 1.27 | split, 2 wires firms |
San Diego split ZIP codes: 78384, 78332.
Towns around San Diego
San Diego businesses
557 San Diego-addressed business meters; 2 large-class meters across its main ZIP codes (ERCOT). Request a business rate review.
Compare San Diego plans
San Diego questions
Is electricity deregulated in San Diego?
Mostly. ERCOT counts 4,076 competitive San Diego home meters, all on AEP Texas Central's system, against 1,253 households. Split: 78384, 78332. An address lookup settles it.
Do San Diego homes heat with electricity?
78.0% of San Diego homes heat with electricity (ACS 2020-2024, margin ±8) and 18.6% with utility gas; 44.1% of bill-paying homes report $250 or more a month. Electric-heat homes should compare plans at winter usage.
Which ZIP code covers most of San Diego?
78384: 4,018 San Diego-addressed competitive homes; ratio 2.50 across the ZIP (4,030 home meters in all, 1,610 households).
Who handles San Diego power outages?
Call the wires utility for your street (not the company that bills you): AEP Texas Central (2,364 homes); Nueces Electric Cooperative (1,712 homes).
How do I set up power at a new San Diego home?
Check the address is on AEP Texas Central's wires, choose a plan and a start date. San Diego had 2,963 idle home meters (inactive or de-energized) on Oct. 5, 2026, so many move-ins reconnect an existing meter.
Near San Diego
Wires and counties: AEP Texas Central · Nueces Electric Cooperative · Duval · Jim Wells. Nearby pages: Alice (11 mi) · Bishop (30 mi) · Freer (25 mi) · Kingsville (29 mi) · Mathis (34 mi) · Premont (29 mi)
No-choice areas · Methodology · Compare plans
Sources
- ERCOT TDSP ESIID Extract (report 203): full extract as of Oct 5, 2026; daily files Oct 7-18, 2026
- Census ACS 2020-2024 5-year estimates, tables B25040, B25132, B25024, B25034, B25035, B25018, B19013, B25003, B25002, B25004 (90% margins of error)
- Census Vintage 2025 city and town population estimates
- Census 2020 ZCTA-to-place and ZCTA-to-county relationship files
- EIA-861 (2024) utility service territories by county
- PUCT Power to Choose residential offer export, Oct 19, 2026, 7:59 AM CT
- PUCT: Choosing an Electric Plan
- PUCT broker directory (BR260201)
- AEP Texas (Central Division)
- Nueces Electric Cooperative (NEC)
- AEP Texas Central delivery tariff (effective September 29, 2026)
- Census Bureau 2025 Gazetteer Files, Texas places (land and water area)
BJW Ventures LLC d/b/a Power Hopper | PUCT BR260201. PUCT registration is not an endorsement.