Round Rock, TX Solar Panels

Under Texas Tax Code Section 11.27, the added value that a solar energy system contributes to your home is 100% exempt from property taxes. For example, if your solar installation increases your home’s appraised value by $20,000, you pay zero additional property taxes on that amount. With Texas property tax rates averaging 1.8–2.2%, a typical residential solar system can save homeowners in Round Rock $400–$640 per year in property taxes.

To claim the exemption, you must file Form 50-123 (Exemption Application for Solar or Wind-Powered Energy Devices) with your county appraisal district by April 30 of the year following installation. You do not need to re-file annually — the exemption remains in effect as long as the solar system is operational. Battery storage systems installed as part of a solar energy system and used to store solar-generated electricity generally qualify under the same exemption.

Over the 25-year lifetime of a typical system, this exemption can save Texas homeowners between $10,500 and $14,500 in total property taxes. With the federal residential solar tax credit now expired, this statewide exemption is the single most valuable solar incentive available to Round Rock homeowners in 2026.

Texas exempts solar energy equipment from the state’s 6.25% sales tax (plus any applicable local sales taxes). This exemption applies at the point of purchase, meaning you pay less upfront when buying solar panels, inverters, mounting hardware, and related components for your installation.

The exemption covers equipment used to produce, store, or distribute solar energy for residential or commercial use. Battery storage systems paired with solar installations are also generally eligible for this exemption. No special application is required — the exemption is applied automatically by the retailer or installer at the time of sale.

For a typical Texas residential solar system costing around $20,000–$25,000, the sales tax exemption can represent an immediate savings of $1,250–$1,560 or more, depending on local tax rates. This is an automatic, hassle-free benefit available to all Texas solar buyers statewide, including residents of Round Rock.

Texas does not have a statewide mandatory net metering law. Instead, homeowners with solar panels in the deregulated ERCOT market (covering approximately 85% of the state) must select a Retail Electric Provider (REP) that offers a solar buyback plan in order to receive compensation for excess electricity exported to the grid. Buyback rates vary widely by provider, ranging from approximately $0.037/kWh to retail-rate equivalents, depending on the plan and territory. The Power to Choose marketplace (powertochoose.org), operated by the Public Utility Commission of Texas, allows homeowners in Round Rock to search for and compare available solar buyback plans by ZIP code.

Key buyback options vary by utility territory: In the Austin Energy territory, solar exports are credited at the Value of Solar (VoS) rate of approximately 9.91¢/kWh (2026 rate). In the Oncor/DFW territory, some REPs such as TXU offer retail-rate credits (effectively 1:1), while Oncor’s base buyback rate is approximately 3.7¢/kWh — making battery storage pairing highly beneficial. In the CenterPoint/Houston area, Green Mountain Energy pays approximately 8.5¢/kWh. In AEP/TNMP territory, Chariot Solar Buyback pays around 7.0¢/kWh.

In regulated utility territories (such as El Paso Electric and CPS Energy), net metering or buyback programs are offered directly by the utility. Homeowners should carefully evaluate buyback rates when selecting a REP, as the rate significantly impacts the financial return on a solar investment — especially in areas with lower buyback rates where pairing solar with battery storage can maximize self-consumption and reduce reliance on low-rate grid exports.