Methodology.

Electricity prices

State and utility prices come from the U.S. Energy Information Administration: the Open Data API for state averages and the Form EIA-861 annual survey for each utility. An average residential price is revenue divided by kilowatt-hours sold, so it is a class-wide average and not what any one household pays. Typical bills are the average monthly use times the average price. Five-year changes compare the latest data year with the year five years earlier. Percentages are shown as percent, differences between places are shown with the direction in words.

Delivery-only and energy-only utilities are labeled as such. A delivery-only price leaves out the energy a retail provider sells you, so it is not comparable to a bundled price, and the pages say so.

Solar production

Each Texas city page uses one stored run of the PVWatts v8 model for a 1 kW array: fixed roof mount, 20 degree tilt, due south, standard modules, 14 percent system losses, and typical-year weather from the nearest weather station, whose distance is printed. Results scale linearly with array size, so a 6 kW system is six times the per-kW figure. The model cannot see shade, a roof's real pitch or the equipment actually installed, and the pages say a measured design from an installer is needed.

Derived figures

Rankings, percentiles and neighbor comparisons on a city page are computed only from the other modeled cities in the same data set. The page prints the inputs, so a reader can repeat the arithmetic. A difference smaller than about one percent is described as within the noise of weather-station differences, not as a real advantage.

Texas rules and statutes

Statements about Texas law and regulation come from the statute or rule text or from a PUCT or state agency page. Each guide lists the document, its effective date and the date it was read. When a source could not be read, the guide lists the item under "excluded" instead of filling the gap from memory.

Checks every page passes before it is published

• Every number traces to a listed source or to arithmetic on one.
• Every page lists its sources with the date, and prints any credit or notice the source requires.
• Pages touching topics where a mistake could cost a reader money, such as taxes or contracts, are held until the site owner approves them after a line-by-line check.
• Links are checked automatically: a build fails if any internal link is broken.
• Pages that would be near-copies of each other are blocked, and pages that add little beyond their template are kept out of search results (see below).

What is kept out of search results

The site has a page for every modeled Texas place, including very small towns, and for every utility in the federal survey. Small-town solar pages and utilities with few residential customers share most of their structure with their neighbors, so they carry a noindex tag and are left out of the sitemap. They stay reachable by link for anyone who needs the figure. Pages for places with at least 10,000 residents, every state, and every other utility are open to search engines.

Dates and updates

Each page shows when its facts were last checked. Price data is refreshed when the federal agency publishes a new year; the 2025 data year was published on 2026-10-07. Texas rule and tariff pages are re-read when this site is next reviewed, and a changed figure replaces the old one with a new date.

Limits

These are estimates from public data and a stated model. They are not quotes, bills, offers or financial advice, and the site does not recommend a provider or an installer.