Keller, TX Solar Energy: Panel Permits (2026)

Rooftop photovoltaic solar installations in Keller require a combined building and electrical permit from the Development Services Building Inspections Division. Permit submittals typically include a structural evaluation or letter from a Texas-licensed professional engineer confirming the roof system can carry the additional dead load, a site plan showing panel location and setbacks, electrical single-line diagrams, string configuration, inverter specifications, and rapid shutdown compliance. Keller enforces the adopted editions of the International Residential Code, International Building Code, International Fire Code, and National Electrical Code, which includes NEC Article 690 for photovoltaic systems and NEC Article 705 for interconnection.

Rooftop arrays must maintain fire access pathways along roof ridges and hips as required by the IFC, typically leaving 3-foot setbacks on each side of a ridge and along the eave. Ground-mounted arrays must comply with setback, height, and screening standards of the Zoning Ordinance. After installation, inspections include a roof-mount inspection, final electrical inspection, and in some cases a rooftop fire inspection. The serving electric utility Oncor requires a separate interconnection application and an approval-to-energize letter before the system can export power. Net metering terms are set by the retail electric provider under Texas PUC rules. Most installations take 4 to 10 weeks from permit to energization.