Texas interconnection applications
150 electric utilities serve Texas (EIA-861, 2025): 9 investor-owned utilitys, 72 municipal utilitys, 68 electric cooperatives, 1 state power authority. Together they serve 12,957,808 residential customers; 137,816 residential customers were on net metering at year-end 2025.
Largest utilities in Texas
Investor-owned utility · 3,545,814 residential customers · Texas
Applications: Third-party portal – Oncor installer portal (eTRACK / DERTRACK, hosted by anbetrack)
Interconnection process and documents →Investor-owned utility · 2,529,039 residential customers · Texas
Applications: Third-party portal – CenterPoint Energy Distribution Interconnection Portal for installers (hosted by anbetrack)
Interconnection process and documents →Municipal utility · 888,946 residential customers · Texas
Applications: Own online portal – CPS Energy Solar Application Site / DG Review Portal
Interconnection process and documents →Investor-owned utility · 793,896 residential customers · Texas
Applications: PowerClerk – AEP PowerClerk interconnection portal
Interconnection process and documents →Municipal utility · 522,446 residential customers · Texas
Applications: PDF + email – Distributed Generation Planning Application (DGPA) + City of Austin AB+C permit portal
Interconnection process and documents →Investor-owned utility · 469,094 residential customers · Texas
Applications: Own online portal – Entergy Interconnection Portal
Interconnection process and documents →Electric cooperative · 420,753 residential customers · Texas
Applications: PowerClerk – PEC Interconnection PowerClerk
Interconnection process and documents →Investor-owned utility · 417,578 residential customers · Texas
Applications: Own online portal – EPE Distributed Generation online Standard / Expansion Interconnection Application (solarium3; e-signature, online fee payment, status link)
Interconnection process and documents →Electric cooperative · 310,805 residential customers · Texas
Applications: Own online portal – CoServ online DG application (residential PV <=50 kW DC)
Interconnection process and documents →Investor-owned utility · 237,930 residential customers · Texas
Applications: PowerClerk – TNMP DG Portal (PowerClerk)
Interconnection process and documents →Investor-owned utility · 324,888 residential customers · Texas
Applications: Own online portal – Xcel Energy DER Interconnection Portal (Salesforce)
Interconnection process and documents →Investor-owned utility · 158,488 residential customers · Texas
Applications: PowerClerk – AEP PowerClerk interconnection portal
Interconnection process and documents →Export compensation among the researched Texas utilities: Buy-all/sell-all, Net billing, NEM. Rules differ by utility – see each utility page.
Texas interconnection rule
Public Utility Commission of Texas (PUCT)
Interconnection rule16 TAC §25.211 (Interconnection of On-Site Distributed Generation) and §25.212 (Technical Requirements) – Interconnection of On-Site Distributed Generation (DG) · source
Applies toElectric utilities under PUCT jurisdiction (incl. ERCOT transmission & distribution utilities such as Oncor, CenterPoint, AEP Texas, TNMP and non-ERCOT IOUs). Electric cooperatives only via §25.211(o) (distributed natural gas generation); municipal utilities not addressed.
Application formCommission-prescribed statewide application for interconnection and parallel operation (§25.211(q) figure) and prescribed interconnection agreement (§25.211(p)); utility must file DG tariff on prescribed form (§25.211(d)). Customer must submit application and execute agreement on these forms before interconnecting (§25.211(e)(5)).
TimelinesPre-certified: interconnect within 4 weeks of complete application; others 6 weeks; if substantial upgrades, within 2 weeks after upgrades complete (§25.211(m)); pre-interconnection studies <=4 weeks.
FeesNo separate application fee in rule; study fees in utility DG tariff; no study fee for pre-certified <=500 kW meeting (g)(1) or network inverter <20 kW; no distribution/O&M/transmission charges for exported energy (§25.211(d)).
External disconnect§25.212(b)(8): manual disconnect accessible to utility personnel, lockable open, with visible break; no small-inverter waiver in rule text, but parties may agree otherwise or seek good-cause exception (§25.212(a)(4)).
Export compensationNone statewide – 16 TAC §25.242(h) (QF purchase arrangements, integrated IOUs only)
No statewide net metering mandate found for ERCOT competitive areas; export compensation is set by retail electric providers. For integrated (non-unbundled) IOUs, §25.242(h) provides standard-rate purchase of QF output <=100 kW; single forward/backward meter option for renewable QFs <=50 kW closed to contracts after 2008-12-31. §25.242 excludes munis, river authorities, coops.
Municipal utilities and electric cooperatives are not bound by §25.211/§25.212 (except coop gas-DG under (o)) and set their own interconnection and net metering/buyback policies.
| Level | Up to | Criteria / review / fee |
|---|---|---|
| Pre-certified, <=500 kW (export/short-circuit limits met) | 500 kW | Pre-certified equipment meeting §25.211(g)(1) export and short-circuit limits · Interconnection within 4 weeks of completed application (§25.211(m)(1)) · No pre-interconnection study fee (§25.211(g)(1)) |
| Network-connected inverter <20 kW | 20 kW | Inverter systems on networked secondary · No study fee (§25.211(i)) |
| Other DG up to 10 MW at PCC, <60 kV | 10000 kW | Non-pre-certified or larger; pre-interconnection study may be required · Interconnection within 6 weeks (§25.211(m)(2)); studies max ~4 weeks (network ~6 weeks) · Study fee per utility tariff, cost estimate before study (§25.211(g)(2)) |
- 16 TAC §25.211: https://www.law.cornell.edu/regulations/texas/16-Tex-Admin-Code-SS-25-211 (retrieved 2026-11-13)
- 16 TAC §25.212: https://www.law.cornell.edu/regulations/texas/16-Tex-Admin-Code-SS-25-212 (retrieved 2026-11-13)
- 16 TAC §25.242: https://www.law.cornell.edu/regulations/texas/16-Tex-Admin-Code-SS-25-242 (retrieved 2026-11-13)
- PUCT §25.211 PDF (403 from fetch): https://ftp.puc.texas.gov/public/puct-info/agency/rulesnlaws/subrules/electric/25.211/25.211.pdf (retrieved 2026-11-13)
All 150 utilities in Texas
- Oncor3,545,814
- CenterPoint Energy Houston Electric2,529,039
- CPS Energy888,946
- AEP Texas (Central Division)793,896
- Austin Energy522,446
- Entergy Texas469,094
- PEC420,753
- El Paso Electric320,320
- CoServ310,805
- TNMP237,930
- Xcel Energy (SPS)223,685
- AEP Texas (North Division)158,488
- SWEPCO157,119
- Magic Valley Electric Cooperative129,596
- Bluebonnet Electric Cooperative119,030
- Tri-County Electric Cooperative117,857
- Grayson-Collin Electric Cooperative, Inc.97,950
- Guadalupe Valley Electric Cooperative Inc.95,358
- City of Lubbock94,738
- United Electric Cooperative Service Inc.91,268
- Sam Houston Electric Cooperative Inc.88,424
- Farmers Electric Cooperative, Inc.88,221
- Trinity Valley Electric Cooperative Inc.82,224
- City of Garland70,627
- City of Denton63,757
- City of Bryan62,535
- South Plains Electric Cooperative Inc.58,726
- City of New Braunfels57,050
- Nueces Electric Cooperative49,903
- Brownsville Public Utilities Board48,500
- Upshur Rural Electric Cooperative Corporation44,971
- City of College Station42,531
- Deep East Texas Electric Cooperative Inc.40,593
- Central Texas Electric Cooperative, Inc.40,305
- Mid-South Electric Cooperative Association37,251
- Wood County Electric Cooperative, Inc.36,173
- Bandera Electric Cooperative, Inc.35,906
- Bowie-Cass Electric Cooperative, Inc.34,727
- San Bernard Electric Cooperative, Inc.32,557
- City of Georgetown31,654
- Medina Electric Cooperative, Inc.30,778
- HILCO Electric Cooperative, Inc.27,850
- Cherokee County Electric Cooperative Association22,613
- City of San Marcos22,362
- Houston County Electric Cooperative Inc.21,761
- Victoria Electric Cooperative, Inc.21,716
- Jasper-Newton Electric Cooperative, Inc.21,316
- Wise Electric Cooperative Inc.20,682
- Kerrville Public Utility Board20,283
- Hamilton County Electric Cooperative Association19,876
- Navasota Valley Electric Cooperative, Inc.19,861
- Taylor Electric Cooperative Inc.19,215
- Navarro County Electric Cooperative, Inc.19,029
- Heart of Texas Electric Cooperative18,476
- Rusk County Electric Cooperative, Inc.18,253
- Cooke County Electric Cooperative Association16,192
- City of Floresville16,149
- City of Greenville16,117
- Jackson Electric Cooperative, Inc.15,670
- Weatherford Mun Utility System14,661
- Fayette Electric Cooperative, Inc.14,439
- Karnes Electric Cooperative Inc.13,599
- Lamar County Electric Cooperative Association13,121
- Bartlett Electric Cooperative, Inc.12,402
- Concho Valley Electric Cooperative Inc.12,230
- Fannin County Electric Cooperative11,962
- San Patricio Electric Cooperative Inc.10,087
- Big Country Electric Cooperative, Inc.9,533
- Panola-Harrison Electric Cooperative, Inc.9,432
- Rio Grande Electric Cooperative, Inc.9,371
- Lyntegar Electric Cooperative, Inc.9,163
- City of Seguin8,913
- Comanche County Electric Cooperative Association7,487
- City of Brenham6,073
- Southwest Texas Electric Cooperative, Inc.5,934
- Wharton County Electric Cooperative, Inc.5,583
- Greenbelt Electric Cooperative, Inc.3,929
- Lighthouse Electric Cooperative, Inc.3,880
- Bailey County Electric Cooperative Association3,461
- North Plains Electric Cooperative Inc.3,093
- Deaf Smith Electric Cooperative, Inc.2,993
- Lamb County Electric Cooperative, Inc.2,799
- Lea County Electric Cooperative, Inc.2,206
- Rita Blanca Electric Cooperative, Inc.1,166
- Southwest Arkansas E C C1,094
- Tri-County Electric Cooperative, Inc. (OK)220
- Southwestern Electric Cooperative Inc.11
- Farmers Electric Cooperative, Inc.0
- Coleman County Electric Cooperative, Inc.0
- Swisher Electric Cooperative, Inc.0
- Southwest Rural Electric Association Inc.0
- City of Lockhart0
- City of Boerne0
- Fort Belknap Electric Cooperative Inc.0
- City of Fredericksburg0
- J-A-C Electric Cooperative Inc.0
- City of Jasper0
- City of Lampasas0
- City of Robstown0
- City of Brownfield0
- City of Cuero0
- City of Liberty0
- City of Granbury0
- Harmon Electric Association Inc.0
- City of Burnet0
- City of Livingston0
- City of La Grange0
- City of Bowie0
- City of Yoakum0
- City of Brady0
- City of Gonzales0
- City of Hondo0
- City of Bellville0
- City of Bastrop0
- City of Giddings0
- City of Luling0
- City of Hempstead0
- City of Sanger0
- City of Hearne0
- City of Coleman0
- City of Bridgeport0
- City of Smithville0
- City of Caldwell0
- City of Whitesboro0
- City of Llano0
- City of Tulia0
- City of Schulenburg0
- City of San Saba0
- City of Hallettsville0
- City of Castroville0
- City of Farmersville0
- City of Mason0
- City of Seymour0
- City of Shiner0
- City of Goldthwaite0
- City of Floydada0
- City of Weimar0
- City of Electra0
- City of Flatonia0
- City of San Augustine0
- Kirbyville Light & Power Company0
- City of Newton0
- City of Hemphill0
- City of Bartlett0
- City of Timpson0
- City of Lexington0
- City of Moulton0
- City of Goldsmith0
- Texas A&M, Utilities & Energy Services0
- City of Waelder0
Residential customers in Texas per EIA-861 (2025). Customer counts = bundled + delivery-only service (EIA-861 Part A + Part D). Service territory is reported by county; a county can be served by several utilities.
$500 / month
Unlimited interconnection applications. 12-month agreement, signed online. The agreement starts the day you sign; first invoice right away, then monthly.
- Unlimited interconnection applications
- Single-line diagram and site plan for every application
- Pre-submission check against the utility’s requirements
- Homeowner e-signature link for the authorization
- Filing in your utility portal accounts or by the utility’s method
- Utility questions, corrections and resubmissions
- Follow-up through approval, inspection and PTO
- Customer list, exports, API and webhooks
Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.