Learning Center

Solar permitting, demystified.

Practical guidance for Texas solar contractors. Articles cover the fundamentals; the city directory reads the same authority records TexPTO watches for its customers — when we learn a Plano gotcha, you see it here too.

Guides

49 articles

Fundamentals15

Texas Battery Storage Permits: Fire Code, UL 9540

How Texas AHJs permit residential batteries: the UL 9540 baseline, fire-code location and spacing rules, DER application impacts, and where cities diverge.

Updated August 2026

Expired Permits, Failed Finals, Re-Inspection Fees

How Texas solar permits expire, what failed finals really cost, and the tracking discipline that keeps a permit portfolio from quietly rotting.

Updated August 2026

Main Panel Upgrades and Solar: The MPU Decision

How main panel upgrades change a Texas solar job: the busbar math that triggers them, the alternatives (supply-side, derate, PCS) and the ripple effects.

Updated August 2026

NEC 2023 for Solar Crews: What Changed, and Where

Texas adopted NEC 2023 as its floor while cities enforce their own editions. The solar-relevant changes worth knowing, and designing to the right code.

Updated August 2026

Reroof + Solar: Sequencing Permits in Texas

Roof replacement and solar interact constantly in hail-country Texas. How to sequence the permits, handle detach-and-reset, and keep insurance honest.

Updated August 2026

Texas Solar Plan Set Requirements, Line by Line

The anatomy of a permit-ready Texas solar plan set: site plan, one-line, equipment sheets, structural detail, labels — plus the per-AHJ layer that decides.

Updated August 2026

SolarAPP+ in Texas: Instant Permits, When It Pays

SolarAPP+ issues instant permits for eligible rooftop solar. Houston runs it; here's how it works, what the data says about speed, and how to decide per job.

Updated August 2026

When Texas AHJs Require Structural Letters

Which Texas cities require PE-stamped structural documentation, what drives wind-load design across the state, and how to make engineering a fast lane.

Updated August 2026

Texas 45-Day Permit Rule: §214.904 and HB 14

Texas Local Government Code §214.904 gives cities 45 days on building permits, and HB 14 added a third-party review path. What installers can do with it.

Updated August 2026

Texas Solar Inspection Checklist: Passing Finals

What Texas inspectors check on residential solar finals — disconnects, labeling, rapid shutdown, as-built accuracy — and how to stop failing for paperwork.

Updated August 2026

Texas Solar Licensing: Who Can Sell and Install

Texas solar licensing explained: no solar-specific license, TDLR electrical contractor rules, who pulls permits, and the new solar retailer registration.

Updated August 2026

Solar Permitting in Texas: The Complete Guide

How solar permitting works in Texas: AHJ variation, the 45-day rule, codes, licensing, and the process from plan set to final inspection.

Updated August 2026

Solar Outside City Limits: Rules With No Permit

Most unincorporated Texas counties don't require solar permits — but the state electrical code, the utility's process and liability still apply.

Updated August 2026

SB 1036: TDLR Registration, Texas Solar Retailers

What Texas Senate Bill 1036 requires: residential solar retailers must register with TDLR, effective September 1, 2026. Not legal advice.

Updated July 2026

Texas Solar Permitting 101: From Permit to PTO

A plain-English guide to solar permits and PTO in Texas: AHJ vs. utility, the seven real steps, what each DFW city wants, and what changed in 2026.

Updated April 2026

Utility interconnection14

Austin Energy Interconnection: Rules and Rebates

How Austin Energy interconnection works: the DG application, AE technical standards, PV metering, value-of-solar compensation, and how rebates interlock.

Updated August 2026

CPS Energy Interconnection: San Antonio's Process

CPS Energy solar interconnection: the application package, equipment standards, review timelines, net billing compensation, and rebate sequencing.

Updated August 2026

AEP Texas Interconnection: One Utility, Two Regions

AEP Texas solar interconnection after the TCC/TNC merger: when to apply, the PUCT framework, in/out metering, REP buyback, and the enrolled-installer incentive program.

Updated August 2026

CenterPoint Interconnection: Houston Field Guide

CenterPoint's solar interconnection process: the DG portal, required documents, photo inspections, the AC disconnect rule, and avoiding violation status.

Updated August 2026

EV Chargers, Batteries, and Texas DER Apps

Which home energy equipment triggers a utility DER application in Texas, and which just triggers load math. Chargers, batteries, V2G, and how to paper each.

Updated August 2026

Meter Reprogramming and Surplus Reporting After PTO

PTO isn't the finish line: meter reprogramming, ERCOT profile updates, and REP reporting decide when export credits actually appear. The timelines, by utility.

Updated August 2026

Oncor Interconnection: The Installer's Field Guide

Oncor's solar interconnection step by step: eTRACK, the two required signatures, the PUCT four-week clock, meter reprogramming and common holdups.

Updated August 2026

Permission to Operate (PTO) in Texas: Timelines

What PTO means in Texas solar, how long it takes with Oncor and CenterPoint, what happens if you energize early, and how installers keep it on schedule.

Updated August 2026

PUCT DER Rulemaking: What Project 54233 Proposes

PUCT Project 54233 is rewriting Texas DER interconnection: new §25.210, amended §25.211, replaced §25.212. What the drafts propose and what to watch.

Updated August 2026

Texas Co-op Solar Interconnection: Their Own Rules

Texas electric co-ops set their own solar interconnection rules, mostly outside PUCT requirements. How installers work Pedernales, CoServ and Bluebonnet.

Updated August 2026

Texas Has No Net Metering: What It Has Instead

Texas has no statewide net metering. Export compensation depends on REP buyback plans in deregulated areas and utility programs elsewhere. How it works.

Updated August 2026

Texas Solar Interconnection: TDUs, Munis, Co-ops

Texas interconnection explained: TDUs vs munis vs co-ops, PUCT rules 25.211/25.212, what utilities can charge, and how installers keep PTO on schedule.

Updated August 2026

TNMP Interconnection: The Letter of No Objection

TNMP solar interconnection step by step: why the application comes before installation, the Letter of No Objection, the DG meter fee, and completion photos.

Updated August 2026

Transformer Limits: When the Grid Caps System Size

Why Texas utilities cap or study residential solar over local transformer capacity, what triggers it, and the design and sales moves that keep jobs alive.

Updated August 2026

Avoiding rejections2

City deep-dives6

Running the permit desk7

For homeowners5

City directory

What each city asks for, checked by our permit desk. Updated whenever the office changes it.

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