Data sources

The calculator uses a small source registry instead of vague claims about live or proprietary data.

Registry last reviewed 2026-09-15

PVWatts V8 city reference yields — 8.5.0

National Laboratory of the Rockies

Source date: 2026-09-15
Last verified: 2026-09-15
Scope: 15 Phase 1 Texas incorporated places

Open primary source

Solar Photovoltaic System Cost Benchmarks — Q1 2025

U.S. Department of Energy

Source date: Q1 2025
Last verified: 2026-09-15
Scope: United States national residential reference system

Open primary source

EIA Texas residential monthly electricity price — 2026-06

U.S. Energy Information Administration

Source date: 2026-06-30
Last verified: 2026-09-15
Scope: Texas residential customers; statewide average

Open primary source

Residential Clean Energy Credit (Section 25D)

Internal Revenue Service

Source date: 2026-09-15
Last verified: 2026-09-15
Scope: United States federal tax law

Open primary source

Solar and Wind-Powered Energy Device Property Tax Exemption

Texas Comptroller of Public Accounts

Source date: 2026-09-15
Last verified: 2026-09-15
Scope: Texas property tax

Open primary source