Texas Solar in 2026: ERCOT, REP Buyback & the Deregulated-Market Economics

For most Texas homeowners, yes — Texas combines below-average installed cost (~$2.9/W), strong sun (5.4 peak hours), and a deregulated retail market where a well-chosen buyback plan can pay back in roughly 11.4–12.5 years on an 8 kW system. The catch is that there is no statewide net metering and no state income tax, so the payback depends heavily on which REP buyback plan you sign (or, for Austin/San Antonio, the municipal utility's solar terms). Without the now-expired 30% federal residential credit, direct ownership is tighter than it was — but Texas is still one of the strongest solar states in the country.

No — there is no statewide net metering mandate in Texas. Instead, in the deregulated ERCOT market (~85% of the state), each Retail Electric Provider (REP) sets its own solar buyback rate. Some REPs (Octopus, Rhythm, Chariot) offer near-full-retail buyback at 12–13.5¢/kWh; the average REP pays ~8.5¢/kWh (~60% of retail). The two big municipal utilities — Austin Energy (Value of Solar Tariff) and CPS Energy (full retail net metering) — set their own terms outside the deregulated market. El Paso Electric, outside ERCOT, offers full retail net metering. The plan you choose is the single biggest payback variable.

As of mid-2026, Octopus Energy (13.5¢/kWh buyback on a ~14¢/kWh retail plan) and Rhythm (13¢/kWh) offer the tightest near-full-retail spreads. Chariot Energy (12¢/kWh) is solar-friendly and 100% solar-sourced. Energy Texas (10¢/kWh) sits at ~77% of retail. The average ERCOT REP pays ~8.5¢/kWh — about 60% of retail — so if you don't shop for a solar-specific plan, you leave roughly half your export value on the table. Plans shift frequently; re-shop at every contract renewal.

Not strictly, but a battery is increasingly popular — ERCOT has a 40%+ battery attach rate on new solar installs. Three forces drive it: (1) Winter Storm Uri and summer heat-wave outages make resilience a real value; (2) time-of-use and wholesale-scarcity arbitrage lets you discharge stored energy during ERCOT price spikes; (3) battery-optimized REP plans (Tesla Electric, Base Power) pay you for dispatching stored energy during grid events. There is no SGIP-equivalent state storage rebate, so a Texas battery is justified on backup + arbitrage logic, not a rebate.

The REP Lock-In Trap is a consumer-protection risk specific to Texas's deregulated market: some REPs offer attractive solar buyback plans that lock you into a multi-year contract. If the REP later cuts the buyback rate, exits the market, or the plan terms change at renewal, you're stuck — either you pay an early-termination fee to leave, or you stay on a now-worse plan. The deeper risk is that a solar system sized around today's generous buyback can become uneconomic if the REP trims the rate at renewal. Protect yourself by reading the early-termination fee, checking whether the buyback rate is guaranteed for the full contract term (not a teaser), avoiding over-sizing based on a promotional rate, and verifying the contract length matches the buyback guarantee.

Yes — if you're in the deregulated ERCOT market (~85% of the state), you can switch REPs at any time, though switching mid-contract usually triggers an early-termination fee. Most Texans are on 12- or 24-month plans and re-shop at renewal. The switch itself is handled by the new REP; your TDU (Oncor, CenterPoint, AEP Texas, or TNMP) keeps delivering the wires and the physical electricity does not interrupt. If you are in Austin Energy, CPS Energy, or a cooperative territory, you cannot switch — those are municipal/co-op utilities outside the deregulated market.

A typical 8 kW rooftop system in Texas runs about $23,200 (2.90/W) before incentives — below the national average, reflecting Texas's mature installer base and competitive deregulated market. The 30% federal residential credit (Section 25D) expired December 31, 2025, so owned systems placed in service in 2026 receive $0 federal credit. Leased/PPA systems may still capture Section 48E for projects that began construction before July 4, 2026. The Texas property tax exemption (Tax Code §11.27) protects 100% of the system's appraised value from reassessment, and municipal rebates (Austin Energy $4,000 max for systems over 3 kW) lower the effective cost in those territories. The CPS Energy (San Antonio) residential per-watt rebate was fully exhausted in December 2022 and is no longer available.

Texas Tax Code §11.27 exempts 100% of the appraised value of a solar energy device from property taxation. In practice, this means installing solar does not trigger a property-tax reassessment that would raise your annual tax bill — the added value of the system is shielded. Because Texas has no state income tax, there is no state solar income-tax credit to stack; the property-tax exemption is the primary state-level solar incentive, and it is unusually generous (full 100% versus many states' partial exemptions). It applies statewide, including in municipal utility territories.

CPS Energy (San Antonio) is generally more solar-friendly than Austin Energy. CPS offers full 1:1 retail net metering at ~11¢/kWh — one of the cleanest payback structures in Texas — though its residential $0.60/W rebate was fully exhausted in December 2022 and is no longer available. Austin Energy uses a Value of Solar Tariff (VOST) crediting exports at ~8–10¢/kWh (below the best deregulated REP buybacks and below CPS retail), plus a $4,000 max rebate for systems over 3 kW (effective July 1, 2026). Both sit outside the deregulated ERCOT market, so you cannot switch to a REP in either. If you have a choice of where to live in Central Texas and solar is a priority, CPS territory has the edge on pure economics.

After the 2026 expiration of the Section 25D residential credit, the structure matters more than ever. A cash or loan purchase keeps the full long-term savings and the Texas property-tax exemption but receives $0 federal credit. A lease or PPA eliminates upfront cost and can still capture Section 48E (the developer claims it and passes value through) on projects that began construction before July 4, 2026 — but in Texas's deregulated market, pay close attention to whether the lease locks you into a specific REP buyback plan and what happens to it at contract end. Compare both paths with your actual REP plan and usage.

Texas averages about 5.4 peak sun hours per day statewide — among the best in the country. A south-facing 8 kW array tilted near latitude typically produces on the order of 12,500–14,500 kWh per year (around $13,500 kWh for a well-sited system). Production varies by region: the Permian Basin and El Paso routinely exceed 6.0 peak sun hours (~1,830 kWh/kW-yr), while humid Gulf-coast Houston runs lower (~1,450 kWh/kW-yr). The Panhandle's cold, clear winters keep winter production strong. Production data is anchored on the per-utility values in our texas-utilities.json dataset.

Look for a Texas-licensed electrical contractor (or a solar specialist with a master electrician on staff), 5+ years of ERCOT-specific experience, and demonstrated familiarity with the interconnection rules of your TDU (Oncor, CenterPoint, AEP Texas, or TNMP) or municipal utility (Austin Energy, CPS). Verify NABCEP certification, ask for recent local references in your specific TDU/utility territory, and confirm the warranty covers both workmanship and equipment. Two Texas-specific red flags: (1) any installer quoting a 30% federal tax credit on a 2026 owned-residential system (25D expired December 31, 2025); (2) any installer who steers you toward a REP buyback plan without showing you the early-termination fee and contract length — that is the REP Lock-In Trap.