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Get a Free QuoteAEP Texas serves 460,000+ customers across 27 South Texas counties including Corpus Christi, McAllen, Laredo, and Harlingen. This guide covers everything you need to know about solar in AEP territory — from interconnection to REP buyback rates — in plain English.
AEP Texas (American Electric Power Texas) is one of four major Transmission and Distribution Utilities (TDUs) in the ERCOT deregulated electricity market. They own and operate the physical power lines, transformers, and meters across South and Southeast Texas — but they are not your electric provider.
In the deregulated ERCOT market, you choose a separate Retail Electric Provider (REP) for your electricity supply. Your REP determines your electric rate, your solar buyback credit rate, and your monthly bill. AEP Texas handles the infrastructure — and critically, the solar interconnection process that allows your panels to connect to the grid.
Key insight: Because AEP Texas is a TDU (not your REP), you have the freedom to choose the best solar buyback plan from any licensed Texas REP. This is one of the biggest advantages of living in a deregulated market — solar customers can shop for REPs that pay the highest export rates.
AEP Texas serves 27 counties across South and Southeast Texas, covering major metro areas in the Coastal Bend, the Rio Grande Valley, and the South Plains. If you live in any of the following cities, AEP Texas is your TDU:
| City | County | Peak Sun Hours/Day | Annual Production (per kW) |
|---|---|---|---|
| Corpus Christi | Nueces County | 5.8 hrs | 1,651 kWh |
| McAllen | Hidalgo County | 6 hrs | 1,708 kWh |
| Laredo | Webb County | 6.2 hrs | 1,765 kWh |
| Harlingen | Cameron County | 6.1 hrs | 1,737 kWh |
| Brownsville | Cameron County | 6.1 hrs | 1,737 kWh |
| Edinburg | Hidalgo County | 6 hrs | 1,708 kWh |
| Mission | Hidalgo County | 6 hrs | 1,708 kWh |
| Victoria | Victoria County | 5.6 hrs | 1,594 kWh |
| Pharr | Hidalgo County | 6 hrs | 1,708 kWh |
South Texas is exceptional for solar. The Rio Grande Valley (McAllen, Laredo, Brownsville) averages 6.0–6.2 peak sun hours per day — among the highest in the continental US. Compare that to Dallas (5.2 hrs) or Houston (5.0 hrs). AEP territory customers get substantially more solar output per dollar invested.
Before your solar panels can connect to the grid, AEP Texas must approve your installation through an interconnection review. Your installer handles this process, but understanding the timeline helps you plan accordingly. Here is how it works:
Your solar installer submits an interconnection application to AEP Texas on your behalf. Applications are submitted through AEP's online Distributed Generation portal. A $100–$250 application fee typically applies.
AEP engineers review the system specifications to ensure your solar installation meets grid safety requirements. Systems under 10 kW typically receive expedited review. Larger systems may require a more detailed study.
AEP issues permission to install, allowing construction to begin. Your installer will coordinate with local permitting authorities in parallel.
Solar panels and inverters are installed. Local city or county inspector visits to verify code compliance. Corpus Christi, McAllen, and Laredo each have their own permit timelines (typically 1–3 weeks).
AEP installs a bi-directional meter to track energy produced and consumed. Permission to Operate (PTO) is issued, and your system goes live. Total timeline from application to PTO typically runs 30–60 days.
Texas does not have state-mandated net metering. What you earn for excess solar energy sent to the grid depends entirely on your chosen REP — not AEP Texas.
AEP Texas simply installs a bi-directional smart meter that tracks how much power flows in and out of your home. Your REP then applies their contracted buyback rate to any exported kilowatt-hours, crediting your account monthly.
| REP | Buyback Type | Export Rate | Notes |
|---|---|---|---|
| Green Mountain EnergyTop Pick | Sell All / Green Buyback | ~8–10¢/kWh | Best buyback rates; 100% renewable plans available |
| Chariot EnergyTop Pick | Solar Buyback | ~6–9¢/kWh | Solar-focused REP; competitive flat-rate plans for AEP territory |
| Gexa Energy | Net Metering Credit | ~5–7¢/kWh | Reliable mid-tier option; good customer service track record |
| TXU Energy | Energy Credit | ~3–5¢/kWh | Large provider but lower solar export credits in AEP territory |
| Reliant Energy | Solar Payback Rewards | ~4–6¢/kWh | Battery-friendly plans; decent buyback but not top tier |
Pro tip: You can switch your REP at any time — before or after solar installation. Many AEP territory solar customers switch to Green Mountain or Chariot Energy specifically for their superior buyback plans. Compare current plans at PowerToChoose.org, Texas's official REP comparison site.
Solar installation in South Texas runs $2.50–$2.90 per watt installed — slightly below the Texas statewide average of $2.60–$3.00/W. Lower labor costs in the Rio Grande Valley and Coastal Bend region, combined with strong local competition among solar installers, keep prices competitive.
| System Size | Gross Cost | Price/Watt | Annual Production | Payback |
|---|---|---|---|---|
| 8 kW | $20,000–$23,200 | $2.50–$2.90/W | 12,800–14,400 kWh | 7–10 years |
| 10 kW | $25,000–$29,000 | $2.50–$2.90/W | 16,000–18,000 kWh | 7–10 years |
| 14 kW | $35,000–$40,600 | $2.50–$2.90/W | 22,400–25,200 kWh | 7–10 years |
Federal 25D Tax Credit: $0 in 2026
The residential solar tax credit expired December 31, 2025. The costs shown above are your out-of-pocket costs. No federal rebate is applied.
Texas Property Tax Exemption — Still Available
Texas exempts 100% of the added home value from solar from property taxes — permanently. With a $25,000 system in Corpus Christi at a 2.1% effective rate, that saves approximately $525/year. Over a 25-year system life: $13,125 in savings.
South Texas is one of the highest-solar-yield regions in the continental United States. AEP territory customers in the Rio Grande Valley and Coastal Bend receive 1,600–1,800 kWh per kW of installed capacity per year — significantly more than most other Texas regions.
Unlike Oncor's "Take a Load Off Texas" program — which pays up to $9,000 for solar + battery combinations — AEP Texas offers no battery rebate for residential customers.
However, batteries still deliver real value in AEP territory:
If your REP has a lower buyback rate, storing excess solar and using it in the evening can significantly improve your ROI versus exporting at low rates.
South Texas is hurricane country. A battery system keeps your critical loads (lights, fridge, AC) running during extended outages when AEP is restoring power.
Tesla's Virtual Power Plant program operates in AEP territory. Powerwall owners can earn credits for dispatching battery energy during peak demand events.
With time-of-use REP plans, charging during solar peak and discharging during evening peak hours can add meaningful savings without any buyback dependency.
Businesses in AEP Texas territory have access to significant commercial solar incentives in 2026. While the residential 25D credit is gone, commercial Section 48/48E credits remain — and South Texas businesses should act before key deadlines.
| Incentive | Amount | Key Deadline |
|---|---|---|
| Section 48E Commercial ITC | 30% base (up to 70% with adders) | AEP territory qualifies. Energy community and domestic content adders available. |
| MACRS Bonus Depreciation | 20% bonus in 2026 (drops to 0% in 2027) | South TX businesses should act before year-end to capture 20% bonus. |
| Texas Property Tax Exemption | 100% of added value exempt | Nueces, Hidalgo, Webb, Cameron counties all qualify. |
| Texas Sales Tax Exemption | Exempt from 6.25% state + local taxes | Significant savings on large commercial systems. |
For large commercial customers (500+ kW), AEP Texas has a separate Large Customer Interconnection process. AEP's large commercial interconnection queue includes projects across the Corpus Christi port, Laredo industrial corridor, and McAllen manufacturing zones.
AEP customers in South and West Texas can access Propel — NuWatt's $0 down financing that gives you the benefits of solar ownership without the large upfront cost. A third-party owner installs FEOC-compliant Silfab 440W panels and claims the 40% Section 48E ITC, passing the savings to you as a fixed monthly payment. An 8 kW system at $2.90/W ($23,200) becomes ~$13,920 effective cost at ~$117/month. 8.99% APR, 25-year term, 660 FICO minimum. Construction must begin before July 4, 2026.
See Propel Financing DetailsSouth Texas has some of the best solar economics in the state. Get a free, no-obligation estimate tailored to your AEP service address.